5.7 heads on5.3

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May 23, 2004 | 01:18 PM

quicksilverado

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5.7 heads on5.3

What would the CR be on a 5.3 with 5.7 heads?

May 23, 2004 | 01:25 PM

Flyer

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Somewhere around 9.1 I think.

May 23, 2004 | 07:01 PM

02Reaper

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The combustion chambers on the 5.7 heads will be wider than your cylinder bore, thus hurting performance.

May 23, 2004 | 07:09 PM

quicksilverado

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Quote:

Originally Posted by 02Reaper

The combustion chambers on the 5.7 heads will be wider than your cylinder bore, thus hurting performance.

I'm Switching from an old side mount magnacharger to the Radix. From what I understand these heads hurt when N.A., but help when using F.I.

May 23, 2004 | 07:36 PM

treyZ28

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From: Dallas, North Mexico

no no dude, you can go with 5.3 heads on a 5,7 but not nice versa i'm pretty sure b/c of the size of th bores

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