heat will increase during compression, so if increase compression the amount of heat generated in the combustion chamber increases thus increase the chances of detonation. this heat will cause pre-ignition(actual term) where spark produce not by the plug itself.
few options to play:-
- plug heat range, up 1 point... still depending on the ratio increase
- add more fuel... can cool down the chamber abit
- fuel ron... if normally using ron95 then try ron97 otherwise need to add octane booster
- increase IG timing... to compensate the actual spark against spark created by the compression process
roughly that explain it... good luck...:proud:
coz all this can be google up... if you're into technical, browse the forum...
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sorry... should have write 're-tune' instead...
fuh, one of the reason I seldom contribute to people questions...:stupid: