Using thicker head gasket to lower compression?

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FrumRoll

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#1

• May 11, 2006

• #1

Is this an OK practice? Or is it simply the cheap and wrong way to do it? Basically I would like to run GT40P heads with a #19 cam on a stock shortblock, and then throw a Novi at it. Can I lower the compression using a thicker head gasket, or is this really not recommended. How about some recommendations on what head gasket to use.

Thanks

 

8

86bluecobra

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Dec 20, 2004

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May 11, 2006

#2

• May 11, 2006

• #2

yah it can work. maybe the chaep way of doing things but it will work just fine. i forget the brand of head gasket it starts with a C kinda like comsic anyways someone will chime in with the name.

 

Grn92LX

Fidanza Man!

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#3

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Why do you need to lower the compression on a stock shortblock when its already low to begin with? It'll hurt your quench and make you more prone to detonation.

 

F

FrumRoll

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#4

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Grn92LX said:

Why do you need to lower the compression on a stock shortblock when its already low to begin with? It'll hurt your quench and make you more prone to detonation.

Click to expand...

I've been told the GT40P will raise compression to roughly 9.6:1 a little more then I'd like to run on the stock shortblock with a Novi-2k where pulleying for anything less than 8psi is difficult.

 

Grn92LX

Fidanza Man!

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#5

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9.6:1 is nothing IMO.

Besides, don't listen to what people tell you w/o actually MEASURING! If those heads are in the 64cc range you are not 9.6:1.

 

SQUEEZE&STROKE

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May 11, 2006

#6

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They are cometic head gaskets...or try SCE in California.

 

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86bluecobra

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#7

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SQUEEZE&STROKE said:

They are cometic head gaskets...or try SCE in California.

Click to expand...

thx for the help with the name of the head gasket.

 

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FrumRoll

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#8

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Grn92LX said:

9.6:1 is nothing IMO.

Besides, don't listen to what people tell you w/o actually MEASURING! If those heads are in the 64cc range you are not 9.6:1.

Click to expand...

I do intend to measure before ordering head gaskets, however the GT40p's I'm installing have been worked over and should be closer 60cc's.

 

dragnazz5.0

My "0" key d0esn't w0rk, s0 I have t0 use the zer0

Nov 19, 2005

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May 11, 2006

#9

• May 11, 2006

• #9

you can do it with thicker head gaskets, but make sure you do the math first so you know what its gonna be before and after

 

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luckythirteen13

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#10

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i have 58cc chamber heads and run a 9psi pulley on my vortech with a power pipe (~11psi) so youll be fine

 

F

FrumRoll

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#11

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luckythirteen13 said:

i have 58cc chamber heads and run a 9psi pulley on my vortech with a power pipe (~11psi) so youll be fine

Click to expand...

I appreciate the first hand knowledge. I assume this was before the Mr. Freeze and 12# setup in your signature?