Quote:
Originally Posted by 94cobra69ss396
CI Rod Length Stroke Ratio
302 5.090 3.000 1.696:1
331 5.400 3.250 1.662:1
347 5.400 3.400 1.588:1
Beside the ratio it also moves the wrist pin up into the oil rings. With how much I drive my car I would prefer a 331 if I stroke it. My first option would be to stay with the 302 and just port the heads and install a smaller blower pulley.
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My 400 is around 1.56 ratio with a six inch rod that the wirst pin goes into the oil ring. No problems.
I've always liked the 347 combo. The bottom end and mid range would really come up with the 3.40 stroke.
Damn, you need to beat a ZR1. That would be sooooo coooool!