race gas

[r450eater]

hey,
i have a friend who rally races and he bought a drum of c 16 racing gas............bad news is the class or requirements for rallying changed and he cant use it. he has like 50 75 gallons or something. i was going to buy some for my 450r i was curious if i could run it with stock jets and stock pipe or should i re tun my jst so i can run it?

[jeremy_283]

yea just put it in and ride........ your quad in like a 12.5:1 compression stock anyways so you technically should be running it all the time but nobody does .............. yes you will be fine

[weemypants]

dude straight race gas is very bad on 4 strokes runs way leaner might fry your piston . or hurt your ring's I run a stock pistion in my 450r with a 50/50 mix of vp 94 oct and that works the best for me .

[jeremy_283]

have you seen the compression on the stock 450r piston!!!!! the race gas will help

[GPracer2500]

Originally posted by extremejrowe
have you seen the compression on the stock 450r piston!!!!! the race gas will help

Maybe. But don't forget that 12.5:1 compression in a modern liquid cooled engine doesn't have the same octane requirements as the same 12.5:1 compression in something like the venerable (and air cooled) 400EX engine.

To the original poster:

C-16 is designed for forced induction and nitrous applications. It's made for very high compression engines with it's 117 MON octane rating.

Is there any benifit to running C-16 in a stock compression 450r? I really couldn't say. My *guess* is at best all it would do is reduce the chance of mild detonation to zero. At worst, it might actually hurt performance. Dyno evidence is about the only thing I can think of that would convince me one way or the other.

If you can get C-16 for less $$ than premium pump then fine--figure out how the bike runs on C-16 and whether jetting changes are needed or not. That detail is something best left for you to figure out unless you find someone competent with an identical settup (bike, fuel, location, etc.) who can advise you.

[boricua]

at least it will smell sweet :devil: :p

[400exrider707]

450R's are not 12.5:1 compression btw. the 04/05 are around 11.2:1 and the 06 and ups are 12:1. There will be absolutely no benefit to running the race gas except the sweet smell, and you will be wasting a lot of money Im guessing.

[ohsobad_chevy]

Originally posted by boricua
at least it will smell sweet :devil: :p

Yes, I love the smell of race gas in the morning!!!! MMmmmm..:devil:

[ingleful]

I usually run 110 octaine in mine then i pour in half a bottle of octaine booster and thats the best ive ever used..gettin some VP soon:D

[LT250RMan]

Originally posted by weemypants
dude straight race gas is very bad on 4 strokes runs way leaner might fry your piston . or hurt your ring's I run a stock pistion in my 450r with a 50/50 mix of vp 94 oct and that works the best for me .

If it runs lean just re jet it so it doent run lean.

[DEVINF450R]

04/05'S ARE 10.5: 1 COMPRESSION, trust me I KNOW this hehe. a 13.1:1 looked like you had cut a softball in half and set it ontop of the stock 10.5:1:D

[DEVINF450R]

If it runs lean just re jet it so it doent run lean.

race gas burns COOLER so it is easier on the engine

[250r4life]

i'd mix it with pump...

[400exrider707]

Originally posted by ingleful
I usually run 110 octaine in mine then i pour in half a bottle of octaine booster and thats the best ive ever used..gettin some VP soon:D

octane booster lowers the level of octane in race gas, why not just mix with pump.

[400exrider707]

Originally posted by DEVINF450R
race gas burns COOLER so it is easier on the engine

Its cooler on the engine, but in theory it requires more heat in order for it to combust. It cooler than detonation on pump yes, but technically its hotter. Also it will make it harder to start if your running it on stock compression/timing.

[LT250RMan]

Originally posted by DEVINF450R
race gas burns COOLER so it is easier on the engine

i was just saying if it is running lean then re jet it so it is not lean and then it wont be hard on the engine.

[boricua]

Originally posted by 400exrider707
Its cooler on the engine, but in theory it requires more heat in order for it to combust. It cooler than detonation on pump yes, but technically its hotter. Also it will make it harder to start if your running it on stock compression/timing.


im pretty sure it doesnt take more heat to fire, rather can take more heat/pressure before pre-igniting.

i think some people believe because race gas is used for racing on racing machines that go fast that if they use it in their "race" machine that it too will go fast......not exactly.

i do think it burns quicker and cooler than pump gas....how much cooler?....not cool enough.

there maybe a slight increase in performance with race gas on a stock engine, but would bet it isnt much....at least not enough to justify buying race gas.

[400exrider707]

Originally posted by boricua
im pretty sure it doesnt take more heat to fire, rather can take more heat/pressure before pre-igniting.


Thats almost one in the same. The higher the octane level, the higher the temperature needs to be for the gas to ignite. The gas itself acts as a cooling property on the engine too. The idea behind race gas is to prevent detonation or pre-ignition. Detonation causes massive amounts of heat, race gas prevents this, but it still requires more energy to burn (compression/heat)

[boricua]

im not one to argue.....

thats just what ive been taught about various race fuels and there octane ratings.....

i guess ill try searching for more info online......

:macho