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Posted

Ok... here is my question...

 

ive recently raised the compression from 130 to 165 psi and modified the stock stator plate to +4 at the same time.

 

will i need to go down to +2 to be safe with that compression or is it just fine? i use 97 pump gas and motul 800 40:1...

 

thanx

Posted

No, keep the timing at +4 degrees. You should probably be fine with 97 octane fuel. However, I think you are starting to push on the edge of needing higher octane fuel.

I run 170 compression, timing +4 and I run 98 octane fuel. It runs fine, but I avoid using old fuel.

Posted

Just watch the plugs, they will ALWAYS tell you if your motor needs more/less fuel, or if you are having detonation problems, etc etc. Other than that I think you will be ok on 97 octane, if need be try a race/pump fuel mix.

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