gt40p milling

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05-14-2009, 08:34 AM

jkrum10238

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Location: NJ

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gt40p milling

how do i figure out how far to mill my heads i wanna get atleast 10.5:1 compression? i heard .30 is about 9.8:1 stock pistons, block, etc

05-14-2009, 11:06 AM

67mustang302

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Location: California

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Just milling your heads to get some arbitrary compression ratio is likely to give you detonation and intake manifold alignment issues. And simply adding more compression isn't going to give you more power.

05-14-2009, 05:22 PM

FLcracker9

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Join Date: Jul 2007

Posts: 528

Like 67mustang302 said, if you mill too much off the heads, you'll have to mill the intake or it won't seal properly (I know this from experience).

05-14-2009, 08:54 PM

mjr46

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get the right cam and intake and set heads up right and you won't need compression to make tons of power

Last edited by mjr46; 05-14-2009 at 09:59 PM.

05-14-2009, 09:45 PM

67mustang302

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Quote:

Originally Posted by mjr46

get the right cam and intake and set heads up right and you won't need compression to make tons of power

+1

The compression ratio works with all that stuff to create actual(sometimes called dynamic) cylinder pressure. The right combination creates high pressure, and therefor high power.

Last edited by mjr46; 05-14-2009 at 10:00 PM. Reason: spelling in my quote