04 LS1-MAN said:What Do You Mean Those Aren't Real Ls-6 Castings, Why Not? And How Do You Tell If Your Buying Good Ones Or Not?
That's what DY means.Patriot Performance said:NOTE: What is an LQ9 head? The LQ9 head is GM's 6.0L head used on various GM trucks. This head has the same ports as the LS6 head and flows identical however it offers the larger combustion chamber at 71.06 for a lower compression.
Please don’t bring this crap over from other boards. Patriot has sent out a large amount of heads and are a great value. Because there is some personal drama between companies and because a few heads have failed does not mean they have a bad "rep".02redhawk said:Careful of the Patriot Performance heads. Their rep is going down the toilet over at LS1tech.com due to producing some marginal (ie, junk) product.
um. the LS6 (243) heads have a 64cc chamber. Unless you want to run over 0.600 lift I would not even worry about the piston to valve clearance.au_ls1 said:if i were you i would get actual ls6 casting and mill them to 64cc chamber(not sure how much), that will bring compression up to roughly 10.7.. which will allow you to run a more radical cam . just becareful with ptv clearence.
those horse power numbers are bull****.gtore62 said::banghead: look into the chevy high performance magazine. there is an article there on the lsi gen 111 engine covering the ls6 cnc head and hot cam and ls6 intake all sold by any gm dealer. 510hp minus stock exhaust sys. you should get about 480hp. price 3600 including head gasket kit. i might get started on this project in october. good luck. forget about warranty.
Chris,[email protected] said:They are right the heads make between 20-30, both heads and cam will be about 55-65 RWHP (still conservative). I would do both at the same time to get the most amount of power. Or you can do just the cam first. Give me a call at the shop, 281-870-8787, or email me @ [email protected]
I have personally removed at least 2 sets of Patriot heads, with sunken valve seats and other issues. I didn't post it on any boards, but want everyone to know my opinion that they are junk so they can decide for themselves. Patriot has had quality issues from the start, I don't even want to get started on the oil burning issues, but let the buyer beware. Just because you haven't personally seen the problems with the Patriots does not mean they're nonexistent. They have a bad rap for a reason, and not isolated events, either. Widespread problems have caused at least one tuner(in Texas, I believe) to stop selling them. The only issues I've seen with hand-ported heads have been from guys who were not big names, machine shops who barely know what an LS1 is, and guys who tried to do it themselves at home. If you're going to spend money on heads, go with a reputable tuner like Cartek, MTI, Texas Speed, etc. instead of going with something that will give you problems down the road IMO.DevilYellow said:Please don’t bring this crap over from other boards. Patriot has sent out a large amount of heads and are a great value. Because there is some personal drama between companies and because a few heads have failed does not mean they have a bad "rep".
I've seen more hand ported heads have catastrophic problems then the patriots.