How much comp can you get...

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Oct 30, 2009 | 10:07 AM

Clean94Z

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How much comp can you get...

With a stock lq4 motor swapping the heads or milling the 317's?

Oct 30, 2009 | 10:32 AM

5.3LJimmy

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From: Napoleonville, LA

Milling 317 head to 66cc with stock .056" gasket = 10.0:1
Milling 317 head to 66cc with cometic .040" gasket = 10.4:1

Swapping to a 243/799 head with 64cc chamber with stock .056" gasket = 10.2:1
Swapping to a 243/799 head with 64cc chamber with cometic .040" gasket = 10.6:1
Swapping to a 243/799 head with 59cc chamber with stock .056" gasket = 10.8:1
Swapping to a 243/799 head with 59cc chamber with cometic .040" gasket = 11.2:1

Results are rounded to the nearest 10th of a point to give you a good idea of what you can achieve with each option.

Oct 30, 2009 | 10:47 AM

Jason 98 TA

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With a PRC 227 or 215cc head you could mill for as much compression as you want. I could ship them well under 55cc if you requested that smalll

We can mill PRC LS6 heads down to 57cc.

Hope that helps!!

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