Thin Head Gaskets?

Reply Subscribe

Thread Tools

Search this Thread

Mar 11, 2004 | 01:14 PM

Da Wiz

Thread Starter

Pro

Joined: Apr 2003

Posts: 568

Likes: 12

From: Jacksonville Florida

Thin Head Gaskets?

Used to be an old trick for bumping up compression a small amount. Since I am doing some head work, does anyone have a recommendation for which one to use?

Thanks for your assistance...

Thanks CFI. I left out some pretty significant info. The car is a 94 LT1. the heads have never been off, so I expect the stock gaskets were used. I also expect the deck height is unchanged.

:cheers:

[Modified by Da Wiz, 6:27 PM 3/11/2004]

Mar 11, 2004 | 01:18 PM

CFI-EFI

Race Director

Joined: Sep 2000

Posts: 17,298

Likes: 32

From: The Top of Utah

Re: Thin Head Gaskets? (Da Wiz)

I doubt you'll ever notice a difference from the gasket. How thick was the old one? What engine? Have you messed with the deck height?

RACE ON!!!

Mar 11, 2004 | 02:27 PM

93 ragtop

Le Mans Master

Joined: Apr 2000

Posts: 5,713

Likes: 105

From: Manassas VA

Re: Thin Head Gaskets? (CFI-EFI)

I believe the factory gasket is a .049 and impalla head gaskets are .029. That is what I used. Now I was told that for every .0065 you reduce by equals .1 compression ratio. This is all rough math, but I believe the impalla gaskets raise the compression by about .3 ie from 10.4 to 10.7

Mar 11, 2004 | 02:36 PM

Da Wiz

Thread Starter

Pro

Joined: Apr 2003

Posts: 568

Likes: 12

From: Jacksonville Florida

Re: Thin Head Gaskets? (93 ragtop)

Thanks Ragtop. I will check on them. Direct fit, right?

:cheers:

Mar 11, 2004 | 03:45 PM

STL94LT1

Race Director

Joined: Jan 2002

Posts: 12,261

Likes: 85

From: O'Fallon Missouri

Re: Thin Head Gaskets? (Da Wiz)

I used these, 94/95 Imp SS head gasket part # 12553160

Mar 11, 2004 | 06:32 PM

Da Wiz

Thread Starter

Pro

Joined: Apr 2003

Posts: 568

Likes: 12

From: Jacksonville Florida

Re: Thin Head Gaskets? (STL94LT1)

Looks like the Impala head gaskets are the way to go. Thanks a ton. Was there anything you guys noticed that you could attribute to the head gaskets?

Thanks fellas. It sure is good to have the benefit of so much experience.

:cheers: :cool: :flag

Mar 11, 2004 | 07:36 PM

kman0066

Burning Brakes

Joined: May 2000

Posts: 1,160

Likes: 10

From: Nashville TN

Re: Thin Head Gaskets? (Da Wiz)

I got the Impala head gaskets as well and one thing I noticed about them is that they don't extend out and have holes for the pushrods. I had forgotten about this after I put my motor together and was curious as to why one is that way and the other not. Were they just supposed to be like pushrod guideplates?

Mar 12, 2004 | 06:03 AM

93 ragtop

Le Mans Master

Joined: Apr 2000

Posts: 5,713

Likes: 105

From: Manassas VA

Re: Thin Head Gaskets? (kman0066)

The thing about not having the guide holes was the only difference I noticed. One thing that came into play on mine, shouldnt be a issue for you, is I had to get my intake milled due to the fact that I had the heads shaved .030 as well.