317 heads ?

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Apr 22, 2011 | 03:51 PM

gallo-lo

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From: ny LI 495.

317 heads ?

I'm lookin in gettin my cr to a 8.9 or 9.1 how much should I have the heads milld down to? I'm doin the 5.3 boostt72 .96 t4 build w/317 headsGM headgasket .54, z06 cam , z06intake, 80lbs inj, th400 9.5tc, 3.23 gears.

Apr 22, 2011 | 04:33 PM

Snyper

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From: Connecticut

What size pistons? Im running -11cc pistons with unmilled CNCd 317s and thats what my compression is.

Apr 22, 2011 | 04:36 PM

The Beast

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From: Fort Wayne, IN

241's will put you at 8.9 on the stock 5.3 short block with a GM gasket

Apr 22, 2011 | 05:38 PM

gallo-lo

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From: ny LI 495.

I'm usin stock 5.3 bottom. I think I should go with 241heads if it brings me there . I have about 3 sets of 317 heads.

Apr 27, 2011 | 05:33 PM

XXX37

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youd want to mill about .020 off.

Apr 27, 2011 | 07:21 PM

LS1PUNK

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From: Houston, Tx

Remember ur removing material and making the heads thinner, possibility of lifting the head is greater now.

I would suggest picking up a pair of 243's or 799's, flow just as well and have a smaller cc.

Ur set up is VERY similar to mine except im running twins instead of a single.