What compression ratio?

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Oct 23, 2005 | 09:24 PM

Dark Halo

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From: Texas

What compression ratio?

I have a LQ9 6.0 and I was wondering what the compression ratio would be with a 64cc head? How do you figure up compression?

Oct 23, 2005 | 10:23 PM

Rhino79

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From: Cabot, AR

I don't know how to figure the ratio but it will probably be in between 10:1 and 10.5:1.

Oct 24, 2005 | 12:04 AM

KLUG'S SS

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From: BERRIEN CENTER,MICHIGAN

Quote:

Originally Posted by Dark Halo

I have a LQ9 6.0 and I was wondering what the compression ratio would be with a 64cc head? How do you figure up compression?

Well I believe the LQ9 has 72cc heads and 10:1 compression ratio so with 64cc heads I think you would be around 11:1 or maybe even a little higher.

Oct 24, 2005 | 10:56 PM

Dark Halo

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I have been to 11:1 but then I was also told that a 59cc head would put at 11:1

Oct 25, 2005 | 11:35 AM

KLUG'S SS

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From: BERRIEN CENTER,MICHIGAN

Quote:

Originally Posted by Dark Halo

I have been to 11:1 but then I was also told that a 59cc head would put at 11:1

Patriot Performance told me that a 66cc head on a LQ9 would put it at 11:1, there is some formula or something out there to figure it out I believe but I haven't found it yet.

Oct 25, 2005 | 01:40 PM

treyZ28

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From: Dallas, North Mexico

the formula should be fairly inutitive to get close.

(head CC + 3.141*bore/2*headgasket thickness) /displacement per cylinder for a flat top piston will get you close. If you want to get closer, google it.