fbdy4life

hey guys just trying figure out which would be better or cheaper to achieve atleast 10.5 compression for an lq9. would it be cheaper to mill the stock 317 heads or just slap some 243s on it.

thanks.

MonmouthCtyLS7

iTrader: (6)

There very similar to ls6 heads, they have about the same casting & flow numbers. 317's have a 70-72cc chamber, good for dropping compression down for boost.

orangeapeel

iTrader: (18)

Moving to Internal.

Also, the 317's have a 71cc stock.

PREDATOR-Z

You would need to mill ~.014 from 317s (2cc) to achieve 10.5:1 SCR. So still giving you ample room for a decent size cam.
243s will give you 10.9>11:1

fbdy4life

well ill just be putting a baby cam in it. 228 prolly be the highest i go since its my dd. but if i didnt have long term plans with it i would just rebuild the ls1. but yea anybody know a ballpark on the cost of milling to satisfy my compression desires?

SOMbitch

iTrader: (8)

$75-$100