Forced Induction Custom FI Setup Questions

Decompression plates

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Old Feb 18, 2006 | 09:21 AM
  #1  
G13BT's Avatar
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Default 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?
Old Feb 18, 2006 | 09:34 AM
  #2  
RotaryGeek's Avatar
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Default 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.
Old Feb 18, 2006 | 09:51 AM
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Default Re: Decompression plates

You wouldn't need longer bolts. The amount is you would need to raise the head would be minimal.
Old Feb 18, 2006 | 02:28 PM
  #4  
daubleaaron's Avatar
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Default 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.
Old Feb 18, 2006 | 06:23 PM
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Hellbert's Avatar
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Default 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
Old Feb 18, 2006 | 06:30 PM
  #6  
fork's Avatar
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Default 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
Old Feb 18, 2006 | 06:50 PM
  #7  
FooK's Avatar
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Default Re: Decompression plates

you can get thick *** cometic headgaskets.
Old Feb 18, 2006 | 07:42 PM
  #8  
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Default Re: Decompression plates

You can also get copper plate gaskets for this purpose.
Old Feb 19, 2006 | 06:48 AM
  #9  
G13BT's Avatar
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Default 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?
Old Feb 19, 2006 | 01:33 PM
  #10  
germ's Avatar
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Default Re: Decompression plates

www.headgasket.com


they can make ones for you.

they made my gaskets for me, good stuff
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