formula17

iTrader: (4)

416ci l92 4.067 bore -4cc valve relief pistons and 65cc volume heads.

Thanks,
Nick

RWC

iTrader: (5)

I get 11.69 Assuming .010 out of the hole and .060 factory gasket. 11.67 w/.054 gasket and 12.3 w/040 using J-Rod's spreadsheet in Advanced Tech section.

formula17

iTrader: (4)

dang gonna be too high, was looking for 11.1 all said and done. Most guys seem to have the best luck with 11:1 also. Found a good deal on heads and intake but they have a 65cc combustion chamber. O well

Chicago Crew UnderBoss

iTrader: (1)

If the dynamic compression is less than 9 (around 8.6 to 8.8) and you have access to 93 octane good fuel, it will not be too high with a professional tune and would be almost perfect (according to several top engine builders I have been tallking to lately (LME, Canadian Performance, etc.)!