What would the compression be?

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Mar 30, 2007 | 03:21 PM

formula17

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Launching!

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From: Macomb, Michigan

What would the compression be?

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

Thanks,
Nick

Mar 30, 2007 | 03:49 PM

RWC

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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.

Mar 30, 2007 | 03:55 PM

formula17

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From: Macomb, Michigan

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

Apr 2, 2007 | 11:10 PM

Chicago Crew UnderBoss

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From: Elmhurst, IL (Chicago Suburb)

Quote:

Originally Posted by formula17

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.)!

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