will i loose horsepower from race gas??

[yamahaman300]

i bought a can of vp red race gas for my yfz today thinking i would get the horsepower increase every 1 is claiming my quad is completely stock except for a full hmf exhaust, uni intake n proper jetting if i put it in will i gain or loose hp?

thanks for helping

[250r4life]

i sure can't imagine that you would lose horsepower. you should gain a little, but how much really depends on how much compression you have... if you're just stock i wouldnt keep running straight vp, unless you have a money tree, and if so, could i get your property address by chance :devil:

[yamahaman300]

haha no i'm not a money tree but thanks for the info i just heard from 1 guy that i might loose hp n i wanted 2 ask around and see if it was true thanks 4 the help

[Legal250R]

I have always been told that race gas is only necessary when using a high compression piston because it resists detonation at higher compressions. In a stock compression motor, you might actually lose horsepower because race gas is more difficult to ignite (if anyone knows if this is true please explain this concept as I am merely making an educated guess based on information from a variety of sources over the years). A quad will also run cooler when using race gas because almost all race gas contains lead which has a cooling effect. In a stock compression motor, race gas really provides no other benefits. My stock compression 04 YFZ completed two long years of racing without race gas and looked good when I finally tore it down for a rebuild. I wouldn't run race gas unless the motor was high compression and required the use of race gas. You can buy two gallons of premium for the same price (or less) than a gallon of race gas.

[dogmanjayx]

i dont see why you will run race fuel with stock compression you will not gain but slightly loose power not much but you will loose dont waste your money unless you go to a 13.0 or higher compression piston hope this helps

higher the octane = slower it burns

this is why when u are running a high comp piston, it would normally detonate ( ignite before the piston reaches top dead center) which is very bad, run race gas, it burns slower allowing the engine to turn past top dead center before the fuel ignites..


higher the compresion the faster fuel wants to ignite.

so if you run c14 in your stock motor, it will be a slug, that is like 112 octane or so. with that the fuel in your motor wouldent be igniting till the piston has completed to much of its stroke, resulting and lost hp,, basically it would burn when the piston is to far on its way back doun, not getting the moast out of the burn.

however vp red has a low enouf octane, that it is more just like cleen gas...

I'm pretty shure u wouldent loose power to vp red. if you start running c12 or c14 u will noticibly see performance loss..... dont want that.

[bradley300]

compression is also not the only factor in using race gas. cam overlap also has alot to do with it. more overlap means less time on the up stroke is being used to compress. this is why quads like c-dales with 12:1 compression stock can still run on pump gas

I just learned somthing new.

[yamahaman300]

wow thanks for the info guys i hardly knew about all that other stuff i got a can of vp red and c12 i put the c 12 in n it felt like it had alot more throttle response i'd rather use the red because it is a lower octane like you guys said they make vp 105L it is only 101 octane w/ lead u think that would b the best 1?

[bradley300]

the point of race gas is to use the lowest octane possible, i would stick to 93 octane unless it knocks, then i would go up to maybe 99 or 101

Originally posted by bradley300
the point of race gas is to use the lowest octane possible, i would stick to 93 octane unless it knocks, then i would go up to maybe 99 or 101

is there such thing as race gas 93 octane?

because the gas you get at the pump is CRAP! it is full of bad stuff for your motor, causes carbon build up and stuff. running a vp red is much cleener, more pure fuel.

does a race gas company make a low octane such as 98? or 93?

[bradley300]

i think klotz, elf or VP makes like a 98 octane race gas

u know how much it is?

[mountaineer]

around $50.00 for a five gallon can.

[yamahaman300]

sounds like good stuff where can i get a can i live in walnutport pa?

[mountaineer]

Where is walnutport in PA?

[yamahaman300]

its in northeastern pa an 45 minuts east of harrisburg the area code is 18088 if u can look it up

[aci clay]

vp makes ultamate 4 race gas designed all the new 4 stroke bikes. my son runs it in his crf250r and says he can definetly tell a difference. its not a hi octane, i think its only 93 or 94 but its oxygenated and helps at higher altitudes. we drain the tank and carb if its going to sit more than a week as i heard it can gum up stuff after a while. its about 10 or 12 bucks a gallon but it definetly seems to help on holeshots and we only use about 1 1/2 to 2 gallons on a race day.

[yamahaman300]

do they make a lower octane one for a lower price that i dont have to drain my carb after use? u4 is good stuff but i'm not crazy about draining the fuel system everytime i ride n $12 is alot of money for 1 gallon my local airport sell 100 octane leaded gas for $3,84 a gallon u think this will work like race gas?

thanks

[440racer66]

i get vp it 108 and its only 5.00 for a gallon and i run half and half i works for me a can tell a diffrence between rgular 98 and half and half but full on race gas and half and half i can tel only a little so its cheaper for me to go with half and half