View Poll Results: How much power can LS6 Heads handle?
500-599 rwhp
2
5.13%
600-699 rwhp
7
17.95%
700-799 rwhp
8
20.51%
800-899 rwhp
16
41.03%
900-999 rwhp
3
7.69%
invincible
3
7.69%
Voters: 39. You may not vote on this poll
What's the power limit for LS6 Heads?
What's the power limit for LS6 Heads? LS6 Heads: How much power can they take before they start lifting?
The purpose of this poll is to find out where LS6 heads start having problems keeping a tight seal on the combustion chamber. As mentioned below, this applies to both 243 and 317 casting heads. Bonus points to voters that have lifted a head.
If you vote, please answer:
lifted a head?
what casting?
using head studs?
max power level?
injecting h20/meth/alky?
how much boost?
static compression ratio?
The purpose of this poll is to find out where LS6 heads start having problems keeping a tight seal on the combustion chamber. As mentioned below, this applies to both 243 and 317 casting heads. Bonus points to voters that have lifted a head.
If you vote, please answer:
lifted a head?
what casting?
using head studs?
max power level?
injecting h20/meth/alky?
how much boost?
static compression ratio?
Last edited by white01ss; Apr 9, 2010 at 11:26 AM.
I to am very interested in this seeing as how I should get my PRC Stg 3 LS6 heads tomorrow for my 370-D1 build. I've seen quite a few cars on here make between 700-800 on them. They have a pretty thick deck which is good from a stock casting head and ovbiously good for boost. The LS6 and 317 heads iirc are some of the best besides aftermarket high dollar heads like AFR's or TEA's.
for the love of... vote I did an exhaustive search yesterday but couldn't find much about LS6 GM heads. I even checked a few of the other LSx forums. Found lot's of discussions of the limits of this or that block, but not much about heads. This all started because somebody in the industry told me that LS6 heads start lifting around 700 rwhp or 15 lbs of boost. Funny, after I posted this poll it became the first result on Google searching for: "ls6 head lifted boost".
Im currently running 15psi and made 754rwhp with my TEA LS6 heads. Im using head studs as well. Compression is around 9.1:1 and im using straight pump gas. Havent had any issues yet. I dont think I should either. Give TEA a call.
Teching In
Joined: Nov 2009
Posts: 43
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From: Toronto, Canada
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TECH Resident
Joined: Jan 2009
Posts: 873
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From: oakland, ca
in a week or two i will be installing my prc stage 2.5 headed forged 347 with a d1sc and running 12# of boost thru it..from all the people and shops i have talked to they say you should be fine as long as you use arp head studs, good gaskets and your surfaces are square...but we shal see..
There are a few people in my area that are running low 600 rwhp and have had no issue to this point..
There are a few people in my area that are running low 600 rwhp and have had no issue to this point..
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9 Second Club
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From: Norn Iron
Still no report of a lifted head, though. Bob, you out there?
I wouldn't be afraid to push unmilled ls6's to 900rwhp. I'm making 713rwhp on mine with stock gaskets/bolts. They have never been off. Detonation is the cause of heads lifting on these motors more often than not.
Can't find a reason not to think they could handle 900. People running 8's and 9's with these heads.
