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massdabate
01-20-2003, 04:49 PM
i was wondering what is a good gas to use with a piston under 11.1 for a 400ex????

Silverfox@C&DRacing
01-20-2003, 05:06 PM
VP is a good fuel alot of guys run it around here they also run the B-32 fuel..

McGivern
01-20-2003, 05:06 PM
Under 11:1 you should be OK with high-octane pump gas. I run VP red in both my quads and bike, because they run cooler that way. If you don't mind $5 a gallon, it can't hurt to put in the good stuff.

Mark

northeast400
01-20-2003, 05:29 PM
I run 50/50 race gas and 93 it seems to work well and not as much money

NTPRacing#19
01-20-2003, 06:06 PM
run powermist110 octane . i run it and it goes good. race fuel doesnt give you power. this is how it was explained to me.

With regular pump fuel, say 93, on every power stroke your rear tires are gonna turn 4 times, and for ever powerstroke on 110 octane race fuel your tires are gonna spin 6 times.

thats how it was explained to me

trx400ex
01-20-2003, 06:50 PM
Originally posted by NTPRacing#19
run powermist110 octane . i run it and it goes good. race fuel doesnt give you power. this is how it was explained to me.

With regular pump fuel, say 93, on every power stroke your rear tires are gonna turn 4 times, and for ever powerstroke on 110 octane race fuel your tires are gonna spin 6 times.

thats how it was explained to me

No thats not possible, race gas just alows you to have higher compression pistons/domes, and thats where the HP is.

massdabate
01-20-2003, 06:55 PM
what are some of the advantages of running race gas in a stock bike and lets say a bike with 10.5:1?

trx400ex
01-20-2003, 07:48 PM
Your wallet will be lighter so thats an all around plus. You wont be able to afford to feed yourself so you might lose some weight. Actually i dont think there would be enough gain to justify the cost. On a 10.5.1 it would be good, but on a stock it is just too much, it will only smell better. On an 11.1 which is what im going to run, and higher you should run 100% race gas and that will help with the cooling and lubing the valves due to lead, if you want to get a new piston to run race gas make it worth your time and get an 11.1 dont mess around with any lower unless you dont want to buy race gas. 13.1 pistons are awesome but then you need a stronger rod or your going to risk sending it out of the case and major $$ repair bill. On 12.5:1 and 12:1 they ussually take a 13:1 and shave it down. These pistons will be more money but they are less risk than an 13.1. If you cant afford a new rod in your budget (300$) I would go with either a 12:1 or 11:1 piston and the price diffrence will be about 40$. You seem interested in what to run in an 11:1 and under. Do you already have a piston? If you do just run a 50-50 if you feel you need to run race gas. Some people just run it so they can say there on race gas and feel special inside, and thats ok too.