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Mods => Other Addons => Topic started by: EVO on March 23, 2013, 12:10:13 AM

Title: Yamaha KT100
Post by: EVO on March 23, 2013, 12:10:13 AM
Yeah.  Pretty much. I think if you use the airbox max scene for location and scale it may be the same id not close. Of course dont rotate.  Do you have quality hpmolgation for kt100?
Title: Re: Yamaha KT100
Post by: Andreas.L on March 23, 2013, 12:58:00 AM
Evo the yammaha kt100?
Title: Re: Yamaha KT100
Post by: EVO on March 23, 2013, 02:40:02 AM
I know. But its a start. Plus is some countries it very popular. So anyone have a homologation?
Title: Re: Yamaha KT100
Post by: jd88x89 on March 23, 2013, 02:59:14 AM
Quote from: EVO on March 23, 2013, 02:40:02 AM
I know. But its a start. Plus is some countries it very popular. So anyone have a homologation?
+1 for the KT100 Yamaha. I do have a dino sheet, Ill get it to u tomorrow. If thats what u r looking 4
Title: Re: Yamaha KT100
Post by: Arrowjmax4 on March 23, 2013, 04:48:10 AM
what kt100? theres a J and and S, the S pulls about 6 more HP, my family runs a kart shop and we have a dyno, we have ran at least 100 dyno runs on a J and many on and S, so i could get some of them for you, only problem is there is a large range of perfomance in them, we could get 2 brand new, never run, put them on and there could be about .4 hp difference
Title: Re: Yamaha KT100
Post by: jd88x89 on March 23, 2013, 05:19:33 AM
Quote from: Arrowjmax4 on March 23, 2013, 04:48:10 AM
what kt100? theres a J and and S, the S pulls about 6 more HP, my family runs a kart shop and we have a dyno, we have ran at least 100 dyno runs on a J and many on and S, so i could get some of them for you, only problem is there is a large range of perfomance in them, we could get 2 brand new, never run, put them on and there could be about .4 hp difference
I think EVO is talking about the ones that we race here in the USA
Title: Re: Yamaha KT100
Post by: EVO on March 23, 2013, 05:57:55 AM
yeah a dyno would be great. if I remember right the kt100S with can has 14hp and pipe the pipe gets 18.  the kt100j just has a different head right?  but 6 more hp really?
Title: Re: Yamaha KT100
Post by: DPKarter#43 on March 23, 2013, 12:08:52 PM
Heyy, Arrowjmax whats your shop name and where abouts is it?
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on March 23, 2013, 12:09:09 PM
By AKA rules (Australian Karting Association) a good S will have 16-17 hp vs 11-12 hp for a good J, obviously depending on who's dyno it is. The J has a longer stroke, smaller bore and smaller ports.
Title: Re: Yamaha KT100
Post by: Arrowjmax4 on March 23, 2013, 10:37:30 PM
I found these on the internet, so this is the end for the J pipe
http://api.ning.com/files/tpGVtgXnPAAqVSEYtSW3qzKaNUU8p1dq7fGEV*lziYTdrWEyVTfxczKcNs7d-96qiJRfuJCERgP38NpW1kXygNZZVPkaKqNf/jmotor3.jpg

heres the engine and header pipe

http://api.ning.com/files/YqS4vV75nxFO9Tlhoz9jDRwatYTI52xkcvvsMYLH*CyMj1OAsV2O6KcHKoCoMgaUd33Qod9XCX55bmZre1d1t1kXdSpOpvXm/jmotor.jpg

Quote from: DPKarter#43 on March 23, 2013, 12:08:52 PM
Heyy, Arrowjmax whats your shop name and where abouts is it?

One Stop Kart Shop

What sound recording device would be best?
Title: Re: Yamaha KT100
Post by: jd88x89 on March 24, 2013, 02:02:45 AM
EVO here is the Dyno. This is with the Yamaha KT100S w/SSX (SSX=4-hole can). Clutch should engage about 8500 to 8600. Max RPM it should pull is 14300-14400. Motors w/ cylinders Y3, Y4 and the 787 are legal (according to WKA's Tech Manuel). Only thing is, this is with the can and not the new pipe that has been added this year. But the can will still do you good, however the new pipe gives that motor that more of a kick. This is the new pipe: the SR-Y Pipe (google image search: karting SR-Y Pipe). I dont have the dyno with the new pipe.
Title: Re: Yamaha KT100
Post by: Andreas.L on March 24, 2013, 07:34:08 AM
Is it à yammaha kt100 senior!?!? Hos fast is it compered to rotax junior?
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on March 24, 2013, 12:34:37 PM
Well by Australian rules, Clubman is the KT100S with MG AZ (red) tyres with lights at 140kg and heavies at 160kg. Clubman light is usually about 0.5-1.0 seconds slower than Junior Max depending on the track.
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on March 24, 2013, 12:37:58 PM
Quote from: jd88x89 on March 24, 2013, 02:02:45 AM
EVO here is the Dyno. This is with the Yamaha KT100S w/SSX (SSX=4-hole can). Clutch should engage about 8500 to 8600. Max RPM it should pull is 14300-14400. Motors w/ cylinders Y3, Y4 and the 787 are legal (according to WKA's Tech Manuel). Only thing is, this is with the can and not the new pipe that has been added this year. But the can will still do you good, however the new pipe gives that motor that more of a kick. This is the new pipe: the SR-Y Pipe (google image search: karting SR-Y Pipe). I dont have the dyno with the new pipe.
2 1/8 turns on the low speed? Are you not allowed to modify the carby? :o
Title: Re: Yamaha KT100
Post by: jd88x89 on March 24, 2013, 01:27:35 PM
Quote from: jnl.42 on March 24, 2013, 12:37:58 PM
Quote from: jd88x89 on March 24, 2013, 02:02:45 AM
EVO here is the Dyno. This is with the Yamaha KT100S w/SSX (SSX=4-hole can). Clutch should engage about 8500 to 8600. Max RPM it should pull is 14300-14400. Motors w/ cylinders Y3, Y4 and the 787 are legal (according to WKA's Tech Manuel). Only thing is, this is with the can and not the new pipe that has been added this year. But the can will still do you good, however the new pipe gives that motor that more of a kick. This is the new pipe: the SR-Y Pipe (google image search: karting SR-Y Pipe). I dont have the dyno with the new pipe.
2 1/8 turns on the low speed? Are you not allowed to modify the carby? :o
Quote from: Andreas.L on March 24, 2013, 07:34:08 AM
Is it à yammaha kt100 senior!?!? Hos fast is it compered to rotax junior?

To answer your question jnl, yes you are allowed to adjust the carb settings. This was just a suggestion of what to run them at. And to anwser your question Andreas, yes, it is the sr yamaha kt100s. it has (w/ the 4 hole can) about 17 1/2horse. I know that the jr rotax is 24 horse
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on March 24, 2013, 02:06:07 PM
Yeah I know, but with our engines we usually only run about 1 3/4 low and 1/16 or no high if the low speed and intermediate jets are drilled right, and it has been back bored. 2 1/8 sounds like what I would use if it was a standard carby with a high pop off pressure. It's just interesting to hear what you guys run with the different rules. :D
Title: Re: Yamaha KT100
Post by: Andreas.L on March 24, 2013, 03:45:33 PM
Will this help?

http://web.sbf.se/regler/up/10/KA-H08_007.pdf
Title: Re: Yamaha KT100
Post by: EVO on March 24, 2013, 04:03:15 PM
ok what i really need is high quality photos of the enigne from the front, left, right, back, and top.   Also a dyno graph with the full rpm range.   to make it work in game we need to know the power it makes below 8,000rpm
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on March 24, 2013, 04:14:38 PM
Dyno runs don't go that low, and the engines don't run much below that on track ideally. I could probably get some photos next weekend of an S and a J close up from each side.
Title: Re: Yamaha KT100
Post by: Andreas.L on March 24, 2013, 04:19:19 PM
I can take some photos of my engien
Title: Re: Yamaha KT100
Post by: EVO on March 24, 2013, 05:11:50 PM
The reason i like homolgation photos and line drawings is becuae they are taken prefectly
can you take photos like this   http://www.italsistem.com/italsistem/MV41dwn.zip?? they dont have to be in black and white
Title: Re: Yamaha KT100
Post by: jd88x89 on March 25, 2013, 12:20:19 AM
Quote from: EVO on March 24, 2013, 04:03:15 PM
ok what i really need is high quality photos of the enigne from the front, left, right, back, and top.   Also a dyno graph with the full rpm range.   to make it work in game we need to know the power it makes below 8,000rpm
Is this what ur looking 4? This is with the can btw.
Title: Re: Yamaha KT100
Post by: EVO on March 25, 2013, 12:50:42 AM
thats the same dyno chart.  it needs to start at 0 rpm
Title: Re: Yamaha KT100
Post by: jd88x89 on March 25, 2013, 04:20:50 AM
Whoops, posted it just bc i disnt think u saw it. Sorry. Sadley, i dont have a dyno sheet that starts a zero
Title: Re: Yamaha KT100
Post by: Sam on March 26, 2013, 01:02:21 AM
we run them in australia a kt100s has the square head they have about 6 more hp and the kt100j has a round head
Title: Re: Yamaha KT100
Post by: LIAM-36-AUS on March 26, 2013, 04:34:03 AM
i can take photo's of my engine if you want,  its quite new, about 1 year old,   only been in one race meeting!  ;D     its on my kart though but we are going to take it off soon so it can get tuned  ;)
Title: Re: Yamaha KT100
Post by: Cory_Hayes on March 26, 2013, 06:18:03 AM
Liam, they want a clubby not a J by the sounds of it
Title: Re: Yamaha KT100
Post by: Arrowjmax4 on March 26, 2013, 06:21:26 AM
liam, leave, they want a clubby not j
Title: Re: Yamaha KT100
Post by: EVO on March 26, 2013, 06:25:31 AM
I have one of these with a wet clutch and pipe.not where i live at the moment though. you can see in my flickr

not my engine but funny pic
http://www.kartingclassifieds.com/wp-content/uploads/2012/07/990338-500x375.jpg
Title: Re: Yamaha KT100
Post by: LIAM-36-AUS on March 26, 2013, 06:26:43 AM
Quote from: Arrowjmax4 on March 26, 2013, 06:21:26 AM
liam, leave, they want a clubby not j
oops, sorry i forgot!  :P :-[
Title: Re: Yamaha KT100
Post by: EVO on March 26, 2013, 06:51:04 AM
so once i get the dyno chart and photos i will start this project and probably have a tesing version 1 week following recieving the reference material
Title: Re: Yamaha KT100
Post by: jd88x89 on March 26, 2013, 12:27:06 PM
Black and white photos? right?
Title: Re: Yamaha KT100
Post by: jd88x89 on March 26, 2013, 03:50:44 PM
Ok, here are some quick photos i took: https://www.dropbox.com/s/wzqby4yry1fcy6x/Yamaha%20Pictures.zip
The side with the clutch (black outside bearing) is on the side facing towards the right side pod
I can get better pictures, just give me a bit. There is a black motor mount that extends to meet up with the outside bearing (like the red mount on the bottom of this engine: http://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/ZykAAOxy2LJRCw-m/$(KGrHqF,!pEFD!Iru5fPBRCw-mqKGg~~60_35.JPG (http://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/ZykAAOxy2LJRCw-m/$(KGrHqF,!pEFD!Iru5fPBRCw-mqKGg~~60_35.JPG) ). Also EVO, the kart's clutch doesnt engage until 8600, 8700 and i think starting RPM is at 5500 (ill look) But my point is that i dont think you need the dyno from 0 to where the clutch engages because the kart doesnt do anything but rev until you hit 8600. So the curve is like a straight line going up until you hit 8600, then then you see a gradual  increase of the line as you accelerate. Ill get you a picture of a mychron curve. Just i dont have it now, all i have of anytype of curve right now is the dyno sheet i put up already.
Title: Re: Yamaha KT100
Post by: EVO on March 26, 2013, 05:25:01 PM
Are they not using the superCan anymore. I dont want to make an obsolete class
Title: Re: Yamaha KT100
Post by: jd88x89 on March 26, 2013, 05:52:42 PM
Quote from: EVO on March 26, 2013, 05:25:01 PM
Are they not using the superCan anymore. I dont want to make an obsolete class
Their not. But the motor is the same, ill just have to get a few pics (if i can w/ one w/ the pipe. But that means the curve on the dyno is gonna be off
Title: Re: Yamaha KT100
Post by: EVO on March 27, 2013, 02:21:19 AM
J  Those pictures wont really work.... can you put a white sheet behind,  and take the carb and can off. Also can you take the pictures zoomed in from 5-8 ft away.  it helps flatten the subject which helps me model it.  It would be great if you could do this for the can and carb.  Your efforts will pay off and ill be able to make the best model possible.  Anyone who helps will also get to beta test.   
Title: Re: Yamaha KT100
Post by: EVO on March 27, 2013, 02:33:22 AM
also can you prop up the motor mount so its nice level when you take the pictures
Title: Re: Yamaha KT100
Post by: jd88x89 on March 27, 2013, 04:51:20 PM
Quote from: EVO on March 27, 2013, 02:21:19 AM
J  Those pictures wont really work.... can you put a white sheet behind,  and take the carb and can off. Also can you take the pictures zoomed in from 5-8 ft away.  it helps flatten the subject which helps me model it.  It would be great if you could do this for the can and carb.  Your efforts will pay off and ill be able to make the best model possible.  Anyone who helps will also get to beta test.
Ya, I can. Only thing is I'm not home and I won't be home till Saturday. I'll get it to u, promise. Could u make do w/ the ones I have for now?
Title: Re: Yamaha KT100
Post by: EVO on March 27, 2013, 06:10:02 PM
not really the angles are skewed. i was homing to find a homologation like the one i posted but i had no such luck. They usually have line drawings and realy good pictures
Title: Re: Yamaha KT100
Post by: Sam Flintham on March 28, 2013, 02:48:22 AM
i found an AKA homologation if that helps but i'll keep looking http://www.karting.net.au/wp-content/uploads/2010/09/YAMAHA-KT100S-V-4.pdf
Title: Re: Yamaha KT100
Post by: Sam Flintham on March 28, 2013, 02:49:53 AM
also found this it has drawings http://kartdrome.com/index.php/engines/yamaha-kt-100-engine
Title: Re: Yamaha KT100
Post by: Sam Flintham on March 28, 2013, 02:50:46 AM
http://kartdrome.com/index.php/engines/engine-yamaha-kt100s
Title: Re: Yamaha KT100
Post by: EVO on March 28, 2013, 04:37:00 AM
Those dont help.  See the homologation i posted earlier for the Italsistem
Title: Re: Yamaha KT100
Post by: Sam Flintham on March 30, 2013, 07:43:04 AM
ok  :-[
Title: Re: Yamaha KT100
Post by: Barlo on March 30, 2013, 04:21:50 PM
Italsistem homologations:

Watercooled: http://ebookbrowse.com/italsistem-ml41-pdf-d457332682

Aircooled: http://ebookbrowse.com/italsistem-ml31-pdf-d369522794
Title: Re: Yamaha KT100
Post by: Eslotes on March 30, 2013, 05:10:32 PM
I was bored and looked for more homologations of Engines.

Maxter MX-L 100cc ICA: http://www.kartingzone.com/docs/homologations/engines/Maxter_MX-L.pdf
Vortex RVA 100cc ICA: http://www.kartingzone.com/docs/homologations/engines/Vortex_RVA.pdf
TM K11B 100cc ICA: http://www.kartingzone.com/docs/homologations/engines/TM_K11B.pdf
Parilla Reedjet 100cc ICA: http://www.kartingzone.com/docs/homologations/engines/Parilla_Reedjet.pdf
Title: Re: Yamaha KT100
Post by: EVO on March 30, 2013, 07:33:59 PM
Those are all eslotes and barlo, but one thing at a time. Also homologation are not enough. So one needs to own one of these glorious rotary valve engines so we can record its amazing sound. Which is why the kt100 is the most obvious choice at the moment
Title: Re: Yamaha KT100
Post by: Eslotes on March 30, 2013, 07:51:32 PM
Quote from: EVO on March 30, 2013, 07:33:59 PM
Those are all eslotes and barlo, but one thing at a time. Also homologation are not enough. So one needs to own one of these glorious rotary valve engines so we can record its amazing sound. Which is why the kt100 is the most obvious choice at the moment

Okey good luck with ur proyect wish i can help you..
Title: Re: Yamaha KT100
Post by: Barlo on March 30, 2013, 09:00:51 PM
Good luck Evo!!  ;)
Title: Re: Yamaha KT100
Post by: GhostriderPl on March 30, 2013, 10:15:03 PM
Here you have all the Homologations of the "real" engines  ;)

http://www.kartingzone.com/documents/homologations/engines/




I hope it help you ;) :)





gretings, GhostriderPL
Title: Re: Yamaha KT100
Post by: Arrowjmax4 on March 31, 2013, 06:55:53 AM
again, our family kart shop is dyno-ing (i dont know how to say that haha) well putting the kt100 J's and S's on the dyno weekly, some weeks every day, i need to know where you want the sound from, what is a good device to use (like my iphone?) in a closed room, out in the open, near the exhaust, give me what you need and i can give it, I can also provide like 50 dyno sheets if needed, but i will ask for a base out of the box dyno run for you
Title: Re: Yamaha KT100
Post by: Eslotes on March 31, 2013, 12:37:41 PM
Arrowjmax4 try to buy a snowball microphone they are very good to record sound or just for you at home to talk with ur friends..
Title: Re: Yamaha KT100
Post by: Schwoni on March 31, 2013, 03:59:07 PM
Quote from: Arrowjmax4 on March 31, 2013, 06:55:53 AM
again, our family kart shop is dyno-ing (i dont know how to say that haha) well putting the kt100 J's and S's on the dyno weekly, some weeks every day, i need to know where you want the sound from, what is a good device to use (like my iphone?) in a closed room, out in the open, near the exhaust, give me what you need and i can give it, I can also provide like 50 dyno sheets if needed, but i will ask for a base out of the box dyno run for you

Low, Mid and high rpm
one time just throttle and hold rpm
and then same but with throttle and brake together to simulate working engine.... i hope u understand^^
if u drive 10000 rpm without throttle is another sound as u drive 10000rpm fullthrottle :)
round about 5 sec should be enough, then we have to cut it loopable, that is our problem then ^^
Title: Re: Yamaha KT100
Post by: EVO on March 31, 2013, 05:05:21 PM
Yeah!  Ill use audacity for editing. We also need idle and very low rpm. And somehow rpm going down from low mid and high. For example the fs250 backfire sound on throttle off.
Title: Re: Yamaha KT100
Post by: EVO on March 31, 2013, 05:11:19 PM
Iphone should be fine just record at different distances until you get it clearest with no echo. Also can you put a pipe on please. Thankyou for your help.
Title: Re: Yamaha KT100
Post by: Matthew McLean on April 02, 2013, 03:41:50 AM
Please do the K100S without the clutch. The KT100SEC (the engine with clutch) has a lot less power than the KT100S (without clutch). It will ruin the whole fun in having the KT100S in the game if there is to be a clutch.
Title: Re: Yamaha KT100
Post by: EVO on April 02, 2013, 04:13:04 AM
The kt100 needs atleast a small dry clutch no?  Thats what we use here.
Title: Re: Yamaha KT100
Post by: jd88x89 on April 02, 2013, 04:17:58 AM
Only thing is, that class here in the US is a very popular class (the one with the centripical cluctch). I think this is why EVO is creating this class. But the good thing about it will make u a better driver since it diesnt have the power and or acceleration out of the coner. Therefore having u learn how to keep ur momentum up
Title: Re: Yamaha KT100
Post by: Matthew McLean on April 02, 2013, 08:22:30 AM
Having no clutch would make it more of a momentum challenge?
Maybe make two separate classes, one with clutch as the 'KT100SEC' one without the clutch as 'KT100S' (KT100S having a lot more pull off the corner than the KT100SEC)
Title: Re: Yamaha KT100
Post by: LauZzZn on April 02, 2013, 08:34:37 AM
if you want a 100cc engine without a clutch and great power, you need a kzh 100 from 1995 rpm limit was 22500 and it had 35 or 40hp its a really nice engine
Title: Re: Yamaha KT100
Post by: Matthew McLean on April 02, 2013, 08:54:17 AM
Lauzzzn we're not looking for an engine with great power otherwise we'd just make a jet kart. We want this class because it's a category that many people race in Japan, America, Australia and New Zealand. Japan, Australia and New Zealand use without clutch. There is the option of running with clutch but there is a significant power loss.
Title: Re: Yamaha KT100
Post by: Racehard on April 02, 2013, 12:17:43 PM
Quote from: Arrowjmax4 on March 31, 2013, 06:55:53 AM
again, our family kart shop is dyno-ing (i dont know how to say that haha) well putting the kt100 J's and S's on the dyno weekly, some weeks every day, i need to know where you want the sound from, what is a good device to use (like my iphone?) in a closed room, out in the open, near the exhaust, give me what you need and i can give it, I can also provide like 50 dyno sheets if needed, but i will ask for a base out of the box dyno run for you

Awesome :)
Title: Re: Yamaha KT100
Post by: EVO on April 02, 2013, 02:50:21 PM
Ill make both types. Each will have advantages and disadvantages
Title: Re: Yamaha KT100
Post by: EVO on April 02, 2013, 02:58:54 PM
The design of the twin disc horstman dry clutches we use here lockup in the powerband so they have more pull but the problem is they slip eventually. The difference in the karts will be better low range for clutch, equal mid range, and better top end for the direct drive
Title: Re: Yamaha KT100
Post by: Matthew McLean on April 02, 2013, 03:50:52 PM
Okay sounds good. How long do you think this project will take?
Title: Re: Yamaha KT100
Post by: oppolo on April 02, 2013, 04:06:28 PM
Quote from: EVO on April 02, 2013, 02:50:21 PM
Ill make both types. Each will have advantages and disadvantages

good! thanks for the new 2 karts, have a good work without hurry
Title: Re: Yamaha KT100
Post by: EVO on April 03, 2013, 02:33:08 AM
can some one take a picture of the top of thier engine without the spark cable on. must be perfect.
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on April 03, 2013, 06:12:22 AM
Ahh, I could have taken a bunch of photos of a bare S and J yesterday but I totally forgot. :(
Title: Re: Yamaha KT100
Post by: oppolo on April 03, 2013, 10:13:08 AM
it's some days I'm thinking about how modified the torque curve of an engine, Piboso told the tools for edit the engines is not still ready, how can you make a new engine? where are the RPM here? what's first and second values? what's the meaning of "brake"?

id = i f100
torque
{
   numpoints = 16
   point0 = 0.763889, 0.153375
   point1 = 33.611111, 6.978528
   point2 = 67.986115, 8.991564
   point3 = 116.875000, 11.886503
   point4 = 133.680557, 13.036810
   point5 = 150.486115, 13.899541
   point6 = 167.291672, 17.350460
   point7 = 182.569443, 19.075920
   point8 = 200.138901, 20.130367
   point9 = 219.236115, 18.788343
   point10 = 234.166672, 17.542177
   point11 = 265.833344, 13.707823
   point12 = 300.000000, 10.640338
   point13 = 334.166656, 6.518405
   point14 = 367.500000, 0.766872
   point15 = 398.333313, -0.191718
}
brake
{
   numpoints = 7
   point0 = 1.111111, -0.191718
   point1 = 32.847221, -1.763803
   point2 = 66.458336, -2.607360
   point3 = 116.875000, -4.294479
   point4 = 134.444443, -5.904907
   point5 = 200.138901, -8.512270
   point6 = 362.847229, -10.199386
}
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on April 03, 2013, 02:13:08 PM
My guess:

- First number is engine speed in revolutions per second, or RPM / 60
- Second number is torque in ft/lbs
- Brake means engine braking, ie. the amount of torque it produces with no throttle, should decrease with more revs as a negative number

Set whatever points you have data for and the engine model will interpolate between them in game to smooth it out. Hopefully PiBoSo can correct me if I'm wrong. ;)
Title: Re: Yamaha KT100
Post by: PiBoSo on April 03, 2013, 02:54:57 PM
Quote from: Nathan Dunnett on April 03, 2013, 02:13:08 PM
My guess:

- First number is engine speed in revolutions per second, or RPM / 60
- Second number is torque in ft/lbs
- Brake means engine braking, ie. the amount of torque it produces with no throttle, should decrease with more revs as a negative number

Set whatever points you have data for and the engine model will interpolate between them in game to smooth it out. Hopefully PiBoSo can correct me if I'm wrong. ;)

Correct, except that torque is in N/m
Title: Re: Yamaha KT100
Post by: EVO on April 03, 2013, 07:05:07 PM
Hey moderator can you copy the last two the engine thread. Its more important there. Ill post a progress pic tonight. Just model at the moment
Title: Re: Yamaha KT100
Post by: Sam on April 04, 2013, 01:45:32 AM
evo if you enjoy this project may u please make the j motor thankyou
Title: Re: Yamaha KT100
Post by: EVO on April 04, 2013, 01:55:01 AM
i need the resources and even with this popular engine im not getting much
Title: Re: Yamaha KT100
Post by: jd88x89 on April 04, 2013, 02:20:20 AM
Quote from: EVO on April 04, 2013, 01:55:01 AM
i need the resources and even with this popular engine im not getting much

Here's the top w/o the plug (my spare engine). Im sorry i havent been around to help as much, its just me and my stuff are @ the WKA  Man. Cup Nationals. Im sorry i cant help as much as i want too. Everyone, just be patient!!! In about a week i'll b able to devote time to help EVO. So Now, I hope this just proves im trying to help. Only things that this pic is missing is the clutch, motor mount and third bearing. I will get that stuff soon!! i promise. Plz tell me if u need anymore specifics.

http://www.mediafire.com/?bt4lmdvhu7ouc1f (http://www.mediafire.com/?bt4lmdvhu7ouc1f)
Title: Re: Yamaha KT100
Post by: EVO on April 04, 2013, 02:27:54 AM
Quote from: jd88x89 on April 04, 2013, 02:20:20 AM
Quote from: EVO on April 04, 2013, 01:55:01 AM
i need the resources and even with this popular engine im not getting much

Here's the top w/o the plug (my spare engine). Im sorry i havent been around to help as much, its just me and my stuff are @ the WKA  Man. Cup Nationals. Im sorry i cant help as much as i want too. Everyone, just be patient!!! In about a week i'll b able to devote time to help EVO. So Now, I hope this just proves im trying to help. Only things that this pic is missing is the clutch, motor mount and third bearing. I will get that stuff soon!! i promise. Plz tell me if u need anymore specifics.

http://www.mediafire.com/?bt4lmdvhu7ouc1f (http://www.mediafire.com/?bt4lmdvhu7ouc1f)

Thanks for the picture!!! i just need one of the bottom end crank end side with the clutch off.
Title: Re: Yamaha KT100
Post by: jd88x89 on April 04, 2013, 02:29:47 AM
Quote from: EVO on April 04, 2013, 02:27:54 AM
Quote from: jd88x89 on April 04, 2013, 02:20:20 AM
Quote from: EVO on April 04, 2013, 01:55:01 AM
i need the resources and even with this popular engine im not getting much

Here's the top w/o the plug (my spare engine). Im sorry i havent been around to help as much, its just me and my stuff are @ the WKA  Man. Cup Nationals. Im sorry i cant help as much as i want too. Everyone, just be patient!!! In about a week i'll b able to devote time to help EVO. So Now, I hope this just proves im trying to help. Only things that this pic is missing is the clutch, motor mount and third bearing. I will get that stuff soon!! i promise. Plz tell me if u need anymore specifics.

http://www.mediafire.com/?bt4lmdvhu7ouc1f (http://www.mediafire.com/?bt4lmdvhu7ouc1f)

Thanks for the picture!!! i just need one of the bottom end crank end side with the clutch off.

U want 1 from the bottom or from the side where the crank is sticking out?
Title: Re: Yamaha KT100
Post by: EVO on April 04, 2013, 02:43:43 AM
what airbox and pipe do you use in Australia?
we use this (http://i.ebayimg.com/t/kt100-birel-tony-kart-margay-air-filter-box-rlv-2-hole-/00/s/NDgwWDY0MA==/$T2eC16J,!ysE9sy0h(WgBQ6jC5wrRQ~~60_35.JPG)
Title: Re: Yamaha KT100
Post by: LIAM-36-AUS on April 04, 2013, 03:34:56 AM
Quote from: EVO on April 04, 2013, 02:43:43 AM
what airbox and pipe do you use in Australia?
we use this (http://i.ebayimg.com/t/kt100-birel-tony-kart-margay-air-filter-box-rlv-2-hole-/00/s/NDgwWDY0MA==/$T2eC16J,!ysE9sy0h(WgBQ6jC5wrRQ~~60_35.JPG)
We use exactly the same!  :o  i have one,
i could get pictures ;)
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on April 04, 2013, 05:05:47 AM
Ours are different colour though, silver. This weekend I can get photos from all directions of either the J or S engine as well as the airbox, header pipe and exhaust we use over here.
Title: Re: Yamaha KT100
Post by: Matthew McLean on April 04, 2013, 05:14:02 AM
(http://img130.imageshack.us/img130/7079/p4040303.jpg) (http://imageshack.us/photo/my-images/130/p4040303.jpg/)

Here is an image of the top of my Yamaha KT100S.
I have plenty of photos from all different angles, let me know what you need and I will post more.
Title: Re: Yamaha KT100
Post by: EVO on April 04, 2013, 05:49:16 AM
ive already mafe that airbox in 3d so this is verry good

jd88x89 i found the side picture dont worry about it
http://api.ning.com/files/UNPQW6VKiXDomRlCwbIXtJUkmHbPUjMwYdZkD0vYMSRG48v3MTDuNUEhXrMMpddLqDt-LcxuEwyK-xDNKmNhXpZH1IqBhUKf/15.1.12kartgearforsale018.JPG
Title: Re: Yamaha KT100
Post by: EVO on April 04, 2013, 06:12:21 AM
simple model 2hours
(http://i45.tinypic.com/mw5i60.jpg)
Title: Re: Yamaha KT100
Post by: LauZzZn on April 04, 2013, 08:52:56 AM
good job evo
Title: Re: Yamaha KT100
Post by: James Beer on April 04, 2013, 08:30:19 PM
looking good ;) :)
Title: Re: Yamaha KT100
Post by: Racehard on April 04, 2013, 10:17:18 PM
Great work evo.
Title: Re: Yamaha KT100
Post by: EVO on April 05, 2013, 06:19:48 AM
1 more hour of work
(http://i45.tinypic.com/291ncet.jpg)

with airbox i made a couple months ago
(http://i45.tinypic.com/2u6pkzd.jpg)
Title: Re: Yamaha KT100
Post by: Matthew McLean on April 05, 2013, 06:43:12 AM
Looking good EVO! One question, will the airbox for this engine actually be red..?
Title: Re: Yamaha KT100
Post by: oppolo on April 05, 2013, 09:42:03 AM
go go go  8)
Title: Re: Yamaha KT100
Post by: Racehard on April 05, 2013, 12:26:45 PM
Woah nice, which program do you use evo? 3ds?
Title: Re: Yamaha KT100
Post by: LauZzZn on April 05, 2013, 12:28:33 PM
i guess he is using rhino 5. i think that was the name :D
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on April 06, 2013, 01:57:29 AM
I've just taken all the photos you'll need for a J, do you need any more for the S? I'll probably upload tonight when I get home.
Title: Re: Yamaha KT100
Post by: EVO on April 06, 2013, 04:35:40 AM
Are te header and pipe different?
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on April 06, 2013, 11:53:07 AM
Very similar but different. I took a heap of photos in a rush, didn't get to take photos of the S pipes but in appearance they are almost the same. For the header pipe, with the J we run 34mm ID, 200mm long (measure along the centreline) where as with the S we run 36mm ID, 160mm long, both of them roughly 2mm wall thickness. For the flex pipe, I'm not sure what the exact dimensions are, but for the J it is around 950mm from the face of the barrel all the way to the end of the muffler along the centreline, and for the S it is about 410mm from the face of the barrel to the weld on the big end of the cone. Flex is something that everyone adjusts for different engines but those are standard measurements for us. The muffler itself, here is the table for the two different pipes. The S pipe looks much the same as the J pipe like in my photos, just different dimensions:

(http://img407.imageshack.us/img407/8489/exhaustdimensions.jpg)

AKA14 = J pipe
AKA39 = S pipe

Here is the link for my photos, I also included the AKA KT100J specifications for other measurements: http://www.mediafire.com/?pcbpxf365qlt8b3

If you are looking for more diagrams or pics, you can check out the AKA rules page: http://www.karting.net.au/rules-forms/rules
Title: Re: Yamaha KT100
Post by: EVO on April 06, 2013, 04:56:34 PM
Depending how the s turns out will dwtermine if i do the j
Title: Re: Yamaha KT100
Post by: Cory_Hayes on April 07, 2013, 09:36:16 AM
when will this project be finished?
Title: Re: Yamaha KT100
Post by: EVO on April 07, 2013, 11:05:39 AM
full dyno and sounds files (that are good to edit)
Title: Re: Yamaha KT100
Post by: Arrowjmax4 on April 09, 2013, 07:53:17 AM
With the dyno files would you like just one of an average out of box, a more powerful engine even, collection of some?
Title: Re: Yamaha KT100
Post by: EVO on April 09, 2013, 03:38:28 PM
I read that a properly tuned kt100 makes a ringing sound. Thats what i wwant. So yes a more powerful one
Title: Re: Yamaha KT100
Post by: jd88x89 on April 10, 2013, 10:16:36 PM
Here are the pictures of the clutch EVO: https://www.dropbox.com/s/x4gk5kfsf2tb1vd/Yamaha%20Clutch%20Pics.zip

That big long black thing that is standing out of the clutch is just a zip-tie to hold all  the disc plates together. Hope this helps
Title: Re: Yamaha KT100
Post by: Arrowjmax4 on April 11, 2013, 07:53:49 AM
Ok, getting files tonight, would you just like them as a large picture?
Title: Re: Yamaha KT100
Post by: EVO on April 11, 2013, 03:41:48 PM
for dyno a chart would be best.  for sounds mp3 from iphone is fine. i did  notice that the iphone picks up some static, so i have my figurescrossed that the sounds are good quality.  IF anyone has any recomendations for videos on youtube with good sound please go ahead and post
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on April 12, 2013, 05:34:17 AM
S:
http://www.youtube.com/watch?v=zgBC79-cdNk
http://www.youtube.com/watch?v=qyCKLNykqaY

J:
http://www.youtube.com/watch?v=3VrcI_YtU80

They are only GoPro videos so the sound isn't very good but it's something.
Title: Re: Yamaha KT100
Post by: Sam on April 12, 2013, 06:56:39 AM
go pro changes the sound conpletle
Title: Re: Yamaha KT100
Post by: EVO on April 13, 2013, 07:36:20 PM
what about these?
http://www.youtube.com/watch?v=7cVcvQ_EKIU
http://www.youtube.com/watch?v=Sb-3UTmDNmc
Title: Re: Yamaha KT100
Post by: Eslotes on April 13, 2013, 07:37:47 PM
haha watch coments in first video hah
Title: Re: Yamaha KT100
Post by: Matthew McLean on April 17, 2013, 08:56:11 AM
Progress?
Title: Re: Yamaha KT100
Post by: EVO on April 17, 2013, 03:31:01 PM
3d model is done minus walbro carb.
Sounds need a lot of work
Title: Re: Yamaha KT100
Post by: Praga91 on April 17, 2013, 04:47:22 PM
i can take as many photos as you want with the Carb, and anything else you need EVO
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on April 17, 2013, 05:42:12 PM
There are photos of the Walbro carb in all the photos I took for the J if you get stuck.
Title: Re: Yamaha KT100
Post by: EVO on April 18, 2013, 05:20:33 AM
i have evverything i need except the dyno.  and proper sounds. the ones i used were from the best youtube video i could find
Title: Re: Yamaha KT100
Post by: nmpcs on April 18, 2013, 09:19:43 AM
can't wait to see your work :)
Title: Re: Yamaha KT100
Post by: Arrowjmax4 on April 18, 2013, 12:10:33 PM
Working on getting the sheets, probably wont get sound but, unless you want it in a dyno room
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on April 25, 2013, 03:01:29 AM
15500 rpm of awesomeness. :D

http://www.youtube.com/watch?v=vRT_sJvYP_M
Title: Re: Yamaha KT100
Post by: Matthew McLean on April 25, 2013, 07:38:12 AM
Isn't that Clubman Light, not Sportsman Light..?
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on April 25, 2013, 07:44:22 AM
Sportsman Light = Clubman Light + TAG Restricted Light
Title: Re: Yamaha KT100
Post by: EVO on May 05, 2013, 06:28:55 PM
Arrowjmax4 can you post the dyno
Title: Re: Yamaha KT100
Post by: Matthew McLean on May 06, 2013, 08:56:31 AM
progress?
Title: Re: Yamaha KT100
Post by: Arrowjmax4 on May 22, 2013, 01:06:11 PM
i dont know how you want the file, like do you want a screenshot of the page or what? i cant send you the file because you need the dyno program we use
Title: Re: Yamaha KT100
Post by: EVO on May 25, 2013, 04:24:38 PM
yes screenshot
Title: Re: Yamaha KT100
Post by: Adriano Augusto on May 25, 2013, 11:39:07 PM
Hello EVO. if interest you, you can use these paints for Yamaha engines:

(http://i228.photobucket.com/albums/ee246/adrianoaugusto/yamaha_vermelho_zps66aa32e0.jpg)
(http://i228.photobucket.com/albums/ee246/adrianoaugusto/yamaha_preto_zps709bd094.jpg)
(http://i228.photobucket.com/albums/ee246/adrianoaugusto/yamaha_branco_zps20b675ce.jpg)
(http://i228.photobucket.com/albums/ee246/adrianoaugusto/yamaha_azul_zps2d36ac17.jpg)
(http://i228.photobucket.com/albums/ee246/adrianoaugusto/yamaha_amarelo_zps1f06b490.jpg)

hope you like it  :D
Title: Re: Yamaha KT100
Post by: LIAM-36-AUS on May 25, 2013, 11:52:43 PM
Quote from: Adriano Augusto on May 25, 2013, 11:39:07 PM
Hello EVO. if interest you, you can use these paints for Yamaha engines:

(http://i228.photobucket.com/albums/ee246/adrianoaugusto/yamaha_vermelho_zps66aa32e0.jpg)
(http://i228.photobucket.com/albums/ee246/adrianoaugusto/yamaha_preto_zps709bd094.jpg)
(http://i228.photobucket.com/albums/ee246/adrianoaugusto/yamaha_branco_zps20b675ce.jpg)
(http://i228.photobucket.com/albums/ee246/adrianoaugusto/yamaha_azul_zps2d36ac17.jpg)
(http://i228.photobucket.com/albums/ee246/adrianoaugusto/yamaha_amarelo_zps1f06b490.jpg)

hope you like it  :D
wow!  there great!   i love the blue one! ;D
Title: Re: Yamaha KT100
Post by: EVO on May 27, 2013, 05:30:55 AM
yes those are great. I will include them in the engine pack.
Title: Re: Yamaha KT100
Post by: Adriano Augusto on May 27, 2013, 11:58:29 AM
Great, i will pass one link to you download the karts  :D
Title: Re: Yamaha KT100
Post by: HamletBandit (tonykartmini) on May 27, 2013, 03:31:54 PM
When can i get this
Title: Re: Yamaha KT100
Post by: Arrowjmax4 on May 28, 2013, 08:15:58 AM
Here are the pictures of our most powerful and proper dyno run, it is for the KT100J. (NOT S!!) I though the 2 with data points straight from the dyno will help, it looked like the kind of thing you enter on the engine mapping files.
Problem is the load on the dyno doesnt really start till 4000 revs cause we normally dont care what is under it, we load it from there but the graph gets cut from 4000 and under. i could not find any file where we did a run from 0 revs higher.

Title: Re: Yamaha KT100
Post by: EVO on June 01, 2013, 10:18:24 PM
can you post a KT100S graph and chart. Does the they dyno not record bellow 4000rpm or does it just not show it on the screen.  Can you change the rpm range in the software to show from 0-15,500 rpm? I need the full range so we know the complete power band
Title: Re: Yamaha KT100
Post by: Clova414 on June 02, 2013, 04:35:26 AM
are we talking a 3 hole can 4 hole can or pipe, cause those look like 3 hole figures, sportsman class... 4 hole is atleast 15 hp, and pipe is 18-20??? and there is no torque at 4000 rpm, cause of the clutch so the dyno doesnt read there, clutch usually comes in at 7500-8800 rpm for can classes and 9500-10000 for pipe...
Title: Re: Yamaha KT100
Post by: Cory_Hayes on June 02, 2013, 04:59:57 AM
.................the Kt100 is doing to direct drive aye?
Title: Re: Yamaha KT100
Post by: Praga91 on June 02, 2013, 08:22:48 AM
I hope so Cory..
Title: Re: Yamaha KT100
Post by: Arrowjmax4 on June 03, 2013, 08:10:29 AM
ill get the S next week.

i guess it idles around 3000-4000 anyway. we only rev to 10900 because thats all we actually care about, so we only want to see its pickup to 11 HP and then how it drops...
Title: Re: Yamaha KT100
Post by: jd88x89 on June 03, 2013, 08:55:17 PM
Evo, ill c if i can get a dyno from the guys who hav a pipe. Donno when ill get it but, hopefully soon. Plus evo, the engine idles (here we set it) up untill 8600 or 9000, depending how u set up the clutch. And evo, the pipe is suppose to b, if i am correct, SR-Y pipe
Title: Re: Yamaha KT100
Post by: jd88x89 on June 04, 2013, 08:53:51 PM
Quote from: DRkarter97 on June 04, 2013, 03:28:49 PM
what classes are going to be in this mod?  will junior and senior can (manufacturers cup rules) be included?

I think he is doing the sr.
Title: Re: Yamaha KT100
Post by: EVO on June 05, 2013, 05:29:48 AM
Quote from: Arrowjmax4 on June 03, 2013, 08:10:29 AM
ill get the S next week.

i guess it idles around 3000-4000 anyway. we only rev to 10900 because thats all we actually care about, so we only want to see its pickup to 11 HP and then how it drops...

I understand you are looking for the powerband, but we need the whole rpm range to make a good engine simulation.  otherwise we will be making up data, and that's not accurate
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on June 05, 2013, 05:50:13 AM
You simply won't get data for it because the engines don't run that low, only at idle with no load. If you made numbers up it would not change the driving experience. By Australian rules you will generally run approximately 5500-11000 with a J and 8000-15500 with an S, below that it won't matter what numbers you use because they will only be used to get out of the pits.
Title: Re: Yamaha KT100
Post by: oppolo on June 05, 2013, 09:44:19 AM
true, you don't need to be so exactly under 4000 rpm, following the power curve, drawing an immaginary curve under 4000, making it drops, following the power curve of the exiting kf3 for example
Title: Re: Yamaha KT100
Post by: EVO on June 06, 2013, 03:48:23 AM
Quote from: Nathan Dunnett on June 05, 2013, 05:50:13 AM
You simply won't get data for it because the engines don't run that low, only at idle with no load. If you made numbers up it would not change the driving experience. By Australian rules you will generally run approximately 5500-11000 with a J and 8000-15500 with an S, below that it won't matter what numbers you use because they will only be used to get out of the pits.
OK Nate can you make the .engn? with dyno chart and graphs ArrowJ is getting
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on June 06, 2013, 08:51:33 AM
Sure, no problem.
Title: Re: Yamaha KT100
Post by: oppolo on June 06, 2013, 10:16:22 AM
Quote from: EVO on April 13, 2013, 07:36:20 PM
http://www.youtube.com/watch?v=Sb-3UTmDNmc
why he choke? I thought it was needed only for 100cc engines that revs at 20.000 rpm
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on June 06, 2013, 03:44:55 PM
Because the S runs at over 200 degrees. Choking cools temperatures by up to 20 degrees and also improves engine braking. Some corners I don't even lift off the throttle, I just brake and choke. The J on the other hand only runs at 160-180 and most people don't bother choking.
Title: Re: Yamaha KT100
Post by: oppolo on June 06, 2013, 05:39:37 PM
Quote from: Nathan Dunnett on June 06, 2013, 03:44:55 PM
Because the S runs at over 200 degrees. Choking cools temperatures by up to 20 degrees and also improves engine braking. Some corners I don't even lift off the throttle, I just brake and choke. The J on the other hand only runs at 160-180 and most people don't bother choking.
ahaaa, thanks so much! 93 celsius.
choke is interesting, it adds some difficult more at the driving, hope these KT100 will be simulated very well.
best wishes and thanks
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on June 06, 2013, 06:12:24 PM
No, 200 celsius.  :D
Title: Re: Yamaha KT100
Post by: oppolo on June 06, 2013, 06:30:15 PM
I didn't know, now I have used google, the temp around the spark plug is over 200 c in a race 2 stroke air cooled engine, thanks again for info
Title: Re: Yamaha KT100
Post by: EVO on June 07, 2013, 06:46:18 PM
yeah my S overheats in 20 lap race on 100km/hr track. I can feel the power loss. 
Title: Re: Yamaha KT100
Post by: oppolo on June 07, 2013, 09:19:10 PM
good, so we will use the same drive tecnic as f100, air choke and be carefull to carb
Title: Re: Yamaha KT100
Post by: Matthew McLean on June 09, 2013, 04:25:26 AM
Quote from: Nathan Dunnett on June 05, 2013, 05:50:13 AM
You simply won't get data for it because the engines don't run that low, only at idle with no load. If you made numbers up it would not change the driving experience. By Australian rules you will generally run approximately 5500-11000 with a J and 8000-15500 with an S, below that it won't matter what numbers you use because they will only be used to get out of the pits.

I race very commonly in the KT100S class in Australia (Clubman Light) and it is not rare at all for drivers to get their engines to 16000. So I would say between 5500 and 15800 naturally, but can get to 16100 with higher gearing. If you happen to get airborne, it should blow at about 17100. Also, if possible of course,  the draft shouldn't give as much as an RPM gain as what the F100 does as it would be totally unrealistic. Draft is usually worth about 200 RPM.
Title: Re: Yamaha KT100
Post by: Praga91 on June 12, 2013, 03:43:47 AM
i agree with Matt. The KT100 S run between 6000 - 15,800. My Kt100 was built to NZ Kartsport Specs, and would sit comfortably on 16,400 in draft and 16,200 without you cant compare a J to a S. J's are like lawn mower engines.
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on June 12, 2013, 05:10:49 AM
Yeah like I said that was just approximate. All of the five S engines that I've used have only revved to 15300-15500, sometimes less, and yes they were good engines. It depends on the track and how they're built, but I do know some people rev them higher.
Title: Re: Yamaha KT100
Post by: Praga91 on June 12, 2013, 06:42:05 AM
one old one sat at 16,800 quite nicely :) i miss my air cool F100 though 25,000 :)
Title: Re: Yamaha KT100
Post by: EVO on June 13, 2013, 04:46:07 PM
Does anyone have any interests on working on the sound?  Jared?
Title: Re: Yamaha KT100
Post by: jd88x89 on June 13, 2013, 06:06:48 PM
Quote from: EVO on June 13, 2013, 04:46:07 PM
Does anyone have any interests on working on the sound?  Jared?
Ill try, but the next chance is in 2 weeks @etown. Ill try. Just what do i need to do? let me know what u need.
Title: Re: Yamaha KT100
Post by: oppolo on June 14, 2013, 01:58:45 PM
if it helps I found here the range temperature of a KT100

Yamaha KT-100 which operates in the 350°-420°F cylinder head temperature range and up to 15,000 rpms
http://www.redlineoil.com/content/files/tech/Two-Stroke%20Technical%20Info.pdf
Title: Re: Yamaha KT100
Post by: Cory_Hayes on June 14, 2013, 02:38:00 PM
they AVERAGE around 15600rpm, my friends and I can upload photos of our data if you don't believe me
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on June 14, 2013, 02:50:16 PM
Like I said, it depends heaps on how they are built. There are so many variables with the port cast and other adjustable items that the engine builder has at it's disposal (cylinder head shape, squish band size, port timing, different piston, piston skirt length, ring end gap, ignition timing, etc.) that you could get two engines doing the same times with different gearing, one revving to 14700 and the other revving to 16000.
Title: Re: Yamaha KT100
Post by: Cory_Hayes on June 14, 2013, 03:08:18 PM
.....I have never seen any good person reving a kt100 at 14700rpm
Title: Re: Yamaha KT100
Post by: Clova414 on June 14, 2013, 06:49:32 PM
Its just different regulations, in the states no one revs above 14500 @ 400-420°f ... mostly due to the ignition and exhaust,  I don't know what your rules are over there but they're obviously different... no big deal, just different...I guess we'll all have to come to some kind of middle ground, or multiple classes...
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on June 14, 2013, 08:08:53 PM
Quote from: Cory_bro on June 14, 2013, 03:08:18 PM
.....I have never seen any good person reving a kt100 at 14700rpm

How can you know how many revs people are doing without seeing their data? I've run within 3-4 tenths of my home track's clubby light lap record on a green track with old tyres while only revving to 14800. That lap record was set last year during qualifying at the QLD open states by Ben Stewart against the likes of Joseph Mawson and Cian Fothergill. Seriously, there is no hard and fast rule about how much these engines should rev.
Title: Re: Yamaha KT100
Post by: Matthew McLean on June 15, 2013, 08:04:16 AM
Quote from: Nathan Dunnett on June 14, 2013, 08:08:53 PM
Quote from: Cory_bro on June 14, 2013, 03:08:18 PM
.....I have never seen any good person reving a kt100 at 14700rpm

How can you know how many revs people are doing without seeing their data? I've run within 3-4 tenths of my home track's clubby light lap record on a green track with old tyres while only revving to 14800. That lap record was set last year during qualifying at the QLD open states by Ben Stewart against the likes of Joseph Mawson and Cian Fothergill. Seriously, there is no hard and fast rule about how much these engines should rev.

I see your point but just because that record was set at a state title doesn't mean it's actually as good as what it could be. At a state title the track tends to slow down quite significantly because of the extra amounts of rubber on the track, so you can't really compare. There's a high chance that record would be beaten if all those drivers of Clubman Light went back there on a weekend where there is less rubber. But anyways, what does it matter if it revs that low at that track? The RPM range for the KT100S should be set to what it most commonly runs at all around the place, not what it runs at a club or two, right?
Title: Re: Yamaha KT100
Post by: Cory_Hayes on June 15, 2013, 05:23:48 PM
just putting it out there, ask some engine builders, they say ATLEAST 15000rpm
Title: Re: Yamaha KT100
Post by: GhostriderPl on June 15, 2013, 07:09:05 PM
Quote from: Praga91 on June 12, 2013, 06:42:05 AM
miss my air cool F100 though 25,000 :)

You are dreaming ;) :)   25000 isn't Raceable........In Formula A we use up to 20000 (normally 19600) and in Formula Super A up to 22000......But not more because the Power goes down and the Engine heat up fast....I have 25000 when my chain broke and the Engine starts to fire without a Spark (like a Diesel) ;)




Greetings, GhostriderPL
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on June 16, 2013, 11:45:44 AM
Quote from: Matthew McLean on June 15, 2013, 08:04:16 AMI see your point but just because that record was set at a state title doesn't mean it's actually as good as what it could be. At a state title the track tends to slow down quite significantly because of the extra amounts of rubber on the track, so you can't really compare. There's a high chance that record would be beaten if all those drivers of Clubman Light went back there on a weekend where there is less rubber. But anyways, what does it matter if it revs that low at that track? The RPM range for the KT100S should be set to what it most commonly runs at all around the place, not what it runs at a club or two, right?

It's actually Cian's home track, I'm pretty sure he held the previous record and he's raced here plenty. It was a ridiculously quick track, most classes broke their records by 1-2 tenths, senior national @ 150 beat the old junior national heavy record by like 2 tenths. That's beside the point though, I was pointing out that not all engines are best while revving high. This isn't a track that needs tall gearing either, my other engine revs quite a bit more. I agree that we are going to need to compromise, I'm just saying that the notion of needing to do high revs to be fast is wrong and counter productive.

Quote from: Cory_bro on June 15, 2013, 05:23:48 PM
just putting it out there, ask some engine builders, they say ATLEAST 15000rpm

I've spoken to plenty of engine builders, we build our own mostly. Your engine builder may say that, but that doesn't apply to every engine configuration and it certainly doesn't make it true just because an engine builder said it. I see people trying to make their engines hit a target max revs quite often both with the J and S engines when they don't realise they could pick up a bunch of time by working with the engine's strengths rather than forcing it to do things it can't.
Title: Re: Yamaha KT100
Post by: Top-Kart 92 on June 16, 2013, 12:17:11 PM
when are the Yamaha ready??
Title: Re: Yamaha KT100
Post by: Cory_Hayes on June 16, 2013, 12:23:01 PM
most people I know always rev to 15000rpm +
Do you race opens or clubdays, if so how do you go
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on June 16, 2013, 02:52:45 PM
I've barely done any racing this year but last time I raced was at Bundaberg last month, I went shit because it was the first time driving my new kart and it was set up terribly but I was 0.2-0.3 off the pace against Cian Fothergill, Luke Flynn, Troy Loeskow and a few others. I've done testing since then and picked up heaps so we'll see how I go in two weeks at the QLD open. The time that I raced before that was just a club day at Gladstone, I had a clean sweep and beat the lap record by half a second. The time before that was in Bundaberg for the Mac Truck Challenge and I was the quickest there by 0.2 against Troy Loeskow but crashed out in the final. I'm not often seen at the back of the field if that's what you're wondering, I've got >40 trophies after 4 years of racing so I must be doing something right.
Title: Re: Yamaha KT100
Post by: Cory_Hayes on June 16, 2013, 03:13:57 PM
ight, so what do you think national champions/state champions would rev to......put it this way, if we came to a conclusion that it is atleast 15000rpm, come on, that is pretty average for a clubby
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on June 16, 2013, 03:25:27 PM
I think you're completely missing the point. Every engine is different, it depends on how you set them up for the dozenth time. Debate over.
Title: Re: Yamaha KT100
Post by: Cory_Hayes on June 16, 2013, 03:36:10 PM
welllll every one I talk to revs them to atleast 15000rpm :/ thats awkward
Title: Re: Yamaha KT100
Post by: James Beer on June 16, 2013, 06:48:47 PM
does this really matter? can't you just put it to what the manafacturer says?
Title: Re: Yamaha KT100
Post by: Matthew McLean on June 18, 2013, 10:21:00 AM
Quote from: Nathan Dunnett on June 16, 2013, 02:52:45 PM
I've barely done any racing this year but last time I raced was at Bundaberg last month, I went shit because it was the first time driving my new kart and it was set up terribly but I was 0.2-0.3 off the pace against Cian Fothergill, Luke Flynn, Troy Loeskow and a few others. I've done testing since then and picked up heaps so we'll see how I go in two weeks at the QLD open. The time that I raced before that was just a club day at Gladstone, I had a clean sweep and beat the lap record by half a second. The time before that was in Bundaberg for the Mac Truck Challenge and I was the quickest there by 0.2 against Troy Loeskow but crashed out in the final. I'm not often seen at the back of the field if that's what you're wondering, I've got >40 trophies after 4 years of racing so I must be doing something right.
Sorry but what's your point? This is meant to be a discussion about the Yamaha KT100S for Kart Racing Pro, we really should be worrying about finding the right RPM range not going on about personal achievements. There's an 'Off Topic' section for people to talk about stuff like this.
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on June 18, 2013, 12:15:26 PM
My point was you don't need to rev high to go fast, Cory seemed to think that my own ability invalidates what I say and asked how I go generally, so I answered. Like I said, we're obviously going to need to compromise getting the engine into KRP, the argument didn't really have much to do with KRP. It was a waste of time but it's over now so lets just get on with what's important.
Title: Re: Yamaha KT100
Post by: Cory_Hayes on June 18, 2013, 12:41:44 PM
yes,so we can all agree 15000rpm is about right
Title: Re: Yamaha KT100
Post by: EVO on June 19, 2013, 08:06:15 AM
Nathan Dunnett is doing the engine config (performance)
I am doing the model and editing sound.
Jarrett is capturing sound

Thanks everyone
Title: Re: Yamaha KT100
Post by: Cory_Hayes on June 19, 2013, 09:09:11 AM
oh goooooooooooooooooooooooooood
Title: Re: Yamaha KT100
Post by: Nathan Dunnett on June 19, 2013, 09:25:44 AM
If you think you can do a better job, by all means go ahead, just drop the snarky attitude.
Title: Re: Yamaha KT100
Post by: Cory_Hayes on June 19, 2013, 09:28:02 AM
no you
Title: Re: Yamaha KT100
Post by: Sam Flintham on June 19, 2013, 12:56:16 PM
Shut up cory, this is starting to piss everyone off >:(, you are making this topic into a big argument
Title: Re: Yamaha KT100
Post by: Cory_Hayes on June 19, 2013, 02:07:28 PM
no you are
Title: Re: Yamaha KT100
Post by: Sam Flintham on June 23, 2013, 09:18:37 AM
Any news on the project EVO  :)
Title: Re: Yamaha KT100
Post by: Sam on July 12, 2013, 02:00:12 AM
How's this project coming along
Title: Re: Yamaha KT100
Post by: Matthew McLean on August 01, 2013, 11:41:41 AM
...abandoned?
Title: Re: Yamaha KT100
Post by: EVO on August 02, 2013, 03:10:50 AM
Its in hibernation really. its alot of work for someone with not alot of time, not getting compensated
Title: Re: Yamaha KT100
Post by: rigo77 on August 17, 2013, 06:36:23 PM
Please get back to it EVO, the contribution to the community is heaven sent. Keep at it and know your work brings much joy to the masses who share and utilize your work.
Title: Re: Yamaha KT100
Post by: Andreas.L on September 22, 2013, 04:56:57 PM
Saw that you was testing it today  ::) ::)
Title: Re: Yamaha KT100
Post by: Matthew McLean on September 29, 2013, 10:28:48 AM
Quote from: Andreas.L on September 22, 2013, 04:56:57 PM
Saw that you was testing it today  ::) ::)

was not EVO ^
Title: Re: Yamaha KT100
Post by: EVO on September 29, 2013, 07:43:20 PM
true
Title: Re: Yamaha KT100
Post by: Andreas.L on September 29, 2013, 08:25:34 PM
Do you know how?
Title: Re: Yamaha KT100
Post by: Cory_Hayes on November 10, 2013, 04:58:22 AM
lol
Title: Re: Yamaha KT100
Post by: Sam on November 11, 2013, 09:52:40 AM
Hahah
Title: Re: Yamaha KT100
Post by: EVO on November 12, 2013, 05:46:44 PM
I think these guys on the forum are testing physics probably without a model.  Ask them
Title: Re: Yamaha KT100
Post by: Cory_Hayes on November 12, 2013, 06:03:41 PM
wouldn't it be awkward if they did have an engine model.....
Title: Re: Yamaha KT100
Post by: EVO on November 12, 2013, 07:03:03 PM
not really. i know mine is probobly better. I 'd more impressed if they had sound
Title: Re: Yamaha KT100
Post by: Sam on November 13, 2013, 09:24:25 AM
Wouldnt it be awkward if they had better sound
Title: Re: Yamaha KT100
Post by: EVO on November 14, 2013, 06:35:57 PM
not awkward at all.   I stopped working on mine because i couldn't get the sound right so i would be happy for you squirts.  If you have something good you shouldn't hide it from the other people in the community. Lets see it. 
Title: Re: Yamaha KT100
Post by: Cory_Hayes on November 14, 2013, 06:48:37 PM
Whats the chance of being able to get your engine model and seeing what we can do with engine modding and stuff?
Title: Re: Yamaha KT100
Post by: EVO on November 14, 2013, 10:11:15 PM
How about this someone does the sound.  I think Nathan Dunnett  or one of you guys already has physics for the KT100. and i complete my model.  All it takes is a little team effort. 
Title: Re: Yamaha KT100
Post by: Bayley Bell on November 15, 2013, 03:14:02 AM
Not to be gumby or anything but someone should make a KT100J just for fun :3
Title: Re: Yamaha KT100
Post by: EVO on November 15, 2013, 09:36:21 PM
go for it
Title: Re: Yamaha KT100
Post by: Taddzy on February 12, 2014, 06:13:29 PM
i was just wondering. is this likely to be relented soon? its the closest thing i can get to a tkm on krp
Title: Re: Yamaha KT100
Post by: Taddzy on February 13, 2014, 03:31:12 PM
ok i shall get some dyno sheets from somone  know who rebuild them and may take some photos of my own or you could look hear http://www.tal-ko.com/bt82.html

that would make me happy as f.
The only other thing  i would need then is clay pigeon kart track and i could drive a tkm on the real track i race mine on.

there it the junior bt82 which is a 100cc and the bt82 extreme which is a 115cc.
im also hopefull going to start a project and turn a venom sidwinder chassis into a kart like sim

do u make high detail renders
Title: Re: Yamaha KT100
Post by: Taddzy on February 14, 2014, 04:39:53 PM
DKkarter97. i cant get any images atm but im sure there are plenty of them on google since i cant get to my tkm karts coz my dads on holiday (leaves me behind lool) but i can get u the dyno stuff soon i recon