Decompression plates
 

Do they work??????

Yesterday i was talking to a guy that a few years back had a peugeot 205 1.9 gti turboed, he used stock internals and a stock head gasket "sandwiched" between 2 plates of an unknowned metal, he had custom made them in a company called "Spesso"... it worked just fine until it blew the rings...

Would it be possible to lower the compression from 10:1 to 8,5:1, and would i need longer head bolts?

Re: Decompression plates
 

sounds like you would need longer head bolts. so you mean metal plate - head gasket - metal plate, right? it sounds like it would work, but i would go the opposite way. head gasket - metal plate - head gasket. insure the sealing.

Re: Decompression plates
 

You wouldn't need longer bolts. The amount is you would need to raise the head would be minimal.

Re: Decompression plates
 

Ive used the shims before and never had a problem with them. Lots of people said i'd be popping head gaskets left and right but Ive never blown one running 11psi and under.

Re: Decompression plates
 

i dont remember the name of the company but someone sales a pretty thick gasket, like 2-3 times thicker than stock just for that purpose. i put it into a turbo calc with stock comp. ratio pistons and head and it went WAY down. i dont remember exactly how far but it was a good 1.5 off the ratio

Re: Decompression plates
 

I'm sure some one makes a thicker or stackable head gasket to lower compression. But it would be less than 1 point, and probably no good for high boost

Re: Decompression plates
 

you can get thick ass cometic headgaskets.

Re: Decompression plates
 

You can also get copper plate gaskets for this purpose.

Re: Decompression plates
 

So a good alternative for low comp. pistons and everything that comes with it, would be a a thicker head gasket?????

Does anyone know were can i find a thciker head gasket for a G13B engine from a swift gti?

Re: Decompression plates
 

www.headgasket.com


they can make ones for you.

they made my gaskets for me, good stuff