Im selling my 317 heads. I had TEA open the chambers up on these heads to 79CC to drop the compresson way down. With my flat top pistons and a -2cc relief my calculated CR was 8.6:1. It allowed me to run 15psi with 16* timing on straight 93 octane. No meth needed.
I also had TEA do a 3 angle valve job. These heads come with 918 springs.
PERFECT heads for boost. SOLD

 

Curious. What compression would these drop a stock long block LS2 [10.9:1] down to? Versus the 72cc of a normal 317.

 

With my heads it would be 9.39:1
With standard 317s w/ 72cc chambers it would be 10.11:1

 

tttttttttt

 

heads are SOLD

 

Soldddddddddddddddd