teddyca

iTrader: (37)

I initially was goig to use a set of 317's to get my static compression at 11.4:1 with some .040' gaskets on Diamond 10+ dome pistons, but I think I am leaving alot on the table. One option is a set of heads I found on Ebay. Since I already have springs, rockers, etc... it might be a more logical choice.
http://cgi.ebay.com/ebaymotors/LS1-C...mZ300201995975

Hanzy98LS1

iTrader: (6)

Those look pretty good im in the same boat ive got -12 dome Wisecoes and am tryin to figure out what heads to use. The machine shop is going to cut them down a tad. Im gunna save up and get some that are proven!

99 Blue Bird

iTrader: (3)

y not just use the 317s if u have em already with the springs u have for now. than save and buy some AFRs. most of their heads come with a larger combustion chamber if wanted. or a set of TEA 317 heads? those will probably be cheaper and will be some nice heads.

teddyca

iTrader: (37)

I am being told that the 317's are POS and that even the ebay cores I found would superiorly out perform CNCed 317 heads.

01ssreda4

iTrader: (96)

A 317 is basically an LS6 head with a bigger chamber. Who told you they were POS?

99 Blue Bird

iTrader: (3)

+1 i was beat to it. Whoever told u 317s are a pos obviously have no idea what they are. A set of p&p 317s will flow and work great if u need a set of heads with a 70cc chamber.

teddyca

iTrader: (37)

I have heard this from a few people. I also see them flooded in the market for sale. Do I go with the ported LS1's on Ebay or do I have the 317's worked? What to do

5.3LJimmy

iTrader: (10)

The reason the market is flooded with them is because almost every 6.0 truck engine came with them. When the 6.0's are modded most people go with a smaller chamber head to bump compression. There is not alot of demand for a larger chamber as most run a flat top with valve reliefs. Patriot used to use them for their ported LS6 heads by welding the chambers to make them smaller and marketed them as LS6 style heads.

I agree that you should send them to TEA and have them CNC ported. They will flow just as good and make the same power as an LS6 head.

What cam are you planning on running?

teddyca

iTrader: (37)

Thanks for the reply Jimmy. After looking up numbers and pricing I think the Ebay heads are best bang for the buck. I can spend about $800 get a new set of heads and valves. I can keep the 317 heads and have them worked later down the road and slap those bad boys on my 2500HD HAHA

As for cam I am thinking something around 231/239 .617"/.624" 114LSA+1 I paid Patrick G for his services so lets see what he recommends.

01ssreda4

iTrader: (96)

Im sorry, I don't know if I'd buy Ebay CNC heads unless they could provide flow numbers and proof that the program is good. Lots of the sponsors here have proven track records and that IMO is what you are buying. Remember that all ported heads are not created equal.