In the 8's!!!!!!!!! - Page 9

Fireball · 05-06-2009, 11:07 AM

everyone is getting damn nice heads...I still have the little ETP225s

HUNTER02SS · 05-06-2009, 11:10 AM

Quote:

Originally Posted by Fireball

everyone is getting damn nice heads...I still have the little ETP225s

And you are still going 25mph faster!!!! LOL! They must be working well!

veee8 · 05-06-2009, 11:43 AM

Quote:

Originally Posted by HUNTER02SS

No problem! Not sure what your other chambers were, but maybe you can run a thicker head gasket to get your compression down a little, so you won't have to change your pistons out??

The ported L92's were 75cc, so that is a pretty big difference.

Fireball · 05-06-2009, 11:46 AM

Quote:

Originally Posted by veee8

The ported L92's were 75cc, so that is a pretty big difference.

what was your CR with the old heads vs new heads?

if you're going with the same setup I have, you'll be fine...we have a pretty darn thick HG on mine...

veee8 · 05-06-2009, 11:54 AM

Around 9.5-1, yeah same setup as yours gasket wise. My slugs are .010 above the deck, flat tops with -4cc VR's.

Frank02L · 05-06-2009, 02:03 PM

Just call Cometic. We also have a pretty thick gasket. We're around 10:1.

Fireball · 05-06-2009, 02:35 PM

Quote:

Originally Posted by Frank02L

Just call Cometic. We also have a pretty thick gasket. We're around 10:1.

can't use cometic with Shawns setup

veee8 · 05-06-2009, 02:43 PM

Quote:

Originally Posted by Fireball

can't use cometic with Shawns setup

Didn't care for the cometics when I was NA.

Frank02L · 05-06-2009, 02:51 PM

Oh, ok. I see little difference between the cometic and the OE GM gaskets except 1) the cost and 2) the thickness we needed.

Denali08 · 05-06-2009, 03:17 PM

Quote:

Originally Posted by Fireball

can't use cometic with Shawns setup

Why is that?

HUNTER02SS · 05-06-2009, 03:29 PM

Quote:

Originally Posted by Frank02L

Oh, ok. I see little difference between the cometic and the OE GM gaskets except 1) the cost and 2) the thickness we needed.

There is a big difference in the gaskets. Have you not ever looked at them both?? The Cometic gaskets have a built in o-ring around the combustion chamber. The stock gaskets do not. This is why you cannot use a o-ring block or head with cometic gasket's, But you can with the stock gm gaskets.

HUNTER02SS · 05-06-2009, 03:30 PM

Quote:

Originally Posted by Denali08

Why is that?

More than likely the block or heads are o-ringed!
Cometic gaskets have o-rings built into the gasket.

Frank02L · 05-06-2009, 03:35 PM

Well maybe it was just me overlooking, but yes I've seen a cometic and a GM headgasket.