Quote:
Originally Posted by Mark_Dorman
^ meaning???
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Quote:
Originally Posted by mrturrari
Something to think about too is that higher duration cams decrease compression at lower RPMs while increasing peak cylinder pressures at higher ones. So if you both increase compression and install some performance cams, you can probably run lower octane fuel. How much lower I am not sure but it is the reason you see engines at 12.5:1 running on pump fuel. Their cams are big enough that detonation is less of a problem.
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thats just the terms that are used to describe each
