what type off compression do u need to run race gas(around 110 octane) in a warrior? well it make any difference if a run it?

 

I believe you can run it with the stock engine, but it wouldn't help that much. You will notice the race gas off corners more than anywhere else.

 

190 pounds of compression is about the limit for pump gas. It would be a waste if you use it in a stock engine.

 

Lots of bike shops will gladly sell you race gas at $5-6 / gallon (easy money for them). Unless you have had your motor rebuilt to function at a higher compression (than stock) you are pouring your money down the drain using race gas. If you have a higher compressin motor check with the engine builder for the proper fuel - he'll know for sure. I beleive most stock motors are designed to operate on premium pump gas.

I've been through this whole "race gas" thing with my class 1/2-1600 off-road race car - (1999 AZ Whiplash champs) It likes the pricey 110 octane fuel because it has 12.25:1 compression.

 

i currently am at 10.25:1 the person that did the engine work told me to run at least 93 octane but i dont kno how high octane i can go

 

I have 11:1 compression in my warrior and was told only to run premium but i like the smell of race gas so i am running a mix of Cam2 and premium which works out to about 104 octane. Make sure if you run race gas you rejet because you will be running quite lean with the switch from regular to a high octane gas. What kind of difference did you notice with your 10.25:1 piston I would like to see how a 10.25"1 compares to an 11:1.

 

what kind of gas should i run on a stock 400ex, i know this is not a honda forum but since it was already started. Besides I like yamaha better, no offence to honda though. In the manual it says run at least 92 but it is pretty expensive. will i lose anything or mess anything up if i use 87? Thanks

 

atv69... The guys at work told me... Do NOT run a lower octane fuel in your machine. It will run hotter, work harder and wearout your motor quicker. Pay the extra $1.

 

Quadnut:

Your are correct for most situations....But you also want to avoid pre detonation. That will happen if your running lean or a fuel with too high of an octane rating. That can cause a machine to run hot and inconsistant.
So it kind of works both ways. Depending on compression and mods.

 

Fisher, to my knowledge, the average motor (dunno about more high performance quads) will run on 85, or sometimes even 83, without pre-detonating. The reason they put a higher recommended octane level in the owner's manual is so you'll buy the good stuff, just in case the gas has MTBE or water in it, or it just isn't really the higher octane and the station owner is trying to make an extra few cents on the gallon.

89 is always a safe bet with most any motor (we run it in our 4-wheeler, snowmobiles, lawn mower and scooter), until you crank the compression up (or buy something with an engine that already has a fairly high compression ratio), then you need to go to the really good stuff; 93, 104, or 110. If you're lucky, your local gas station will actual sell the stuff. I don't think any places up here in Maine sell anything more than 93 octane...