#97819, "RE: 8.8:1 je's with Head gasket shim... mistake??" In response to In response to 17
I understand perfectly fine. I think you might be missing some important infor yourself...Do you know the strencgth of those materials? or how they could seal better? That our heads are aluminum? Ths truth is, this guy has a BUILT block. Not a stock one. He asked about HIS set up, not a stock one. This is on a MODERN engine (Im sure the mitsu engineres saw the light and wanted to keep the comp ratio in the 7's but those damn bean counters wanted a higer comp...
So OK, I came off a little harsh. You guys should have at least gotten with me before you started bashing. I don't post much here but I have been on the forums for a few years.
Strength of what materials? 304ss? yes, it is very strong. regardless of the material the shim is very thin and could probably be made of steel for this purpose. I have never had one fail.
how what could seal better? the shim? Mopar recomends using head gasket sealer or copper gasket sealer anyway. The shims will not seal without having at least one layer of the MLS gasket on each side. Cometic and many other manufacturers do the same thing.
Most stock MLS headgaskets are made from a rubber coated spring steel. I have never blown a MLS headgasket.
yes, a built block, I know that now. This shim was never meant for the purpose of running it on, or making better, a built block. It was meant as a very cheap alternative to building your block.
Obviously, it does not make the internals any stronger. What it does is lower combustion chamber temps. Heat is your piston killer wether hyper, cast, or forged.
I have seen first hand in my Neon what detonation does to a Hyper piston. I melted one myself running just 8psi on my first turbo kit. Which I pieced together my self in 2000 without much outside help. Guess what, IT was too hot in the cumbustion chamber due to lack of fuel. So I used some of the technology that HKS used on the Supra and made a shim. This shim is just cheap insurance and allows for mistakes such as melted pistons that most people can't afford.
