Quote:
Originally Posted by jabartram
then you can have the valve reliefs machined deeper and larger.
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only if need be. its kinda silly anyways considering the 3400 only has 2 valves. i figure i can gain approx 3% of power per 1 point of C/R increase. from my research, i learned that gasoline engines can run on pump gas (93 octane for me obviously) up to 13:1 C/R and diesel (your experience) is 14:1 and up. correct?