Lessons in head gasket matters.
11-26-2011, 10:22 PM
#21
Former Vendor
11-27-2011, 10:31 AM
#22
Melting Slicks
I wanted to use those anyway. AFR was telling me I shouldn't. .025" sure isn't much.
11-27-2011, 11:34 AM
#23
Melting Slicks
I am going to order some ls9 gaskets. I will post a picture later of this 4.130" cosmetic gasket on the afr 225s. There is a little room for a smaller gasket as you said.
11-27-2011, 03:04 PM
#24
Melting Slicks
Here is a pic where the ls9 gasket overhangs ever so slightly into the combustion chamber on my afr 225's.
Another shot closer up but a little blurry.
Here is the cometic 4.130" that clears easily.
Based on a racer's first hand experience (Arun) I'm going with the ls9. This cometic looks like a POS next to the ls9's BTW. I might add the cometics are more than twice the price.
I don't see an issue with the overhang here. I think problems are highly unlikely, I'd probably file fit it if I were worried to be able to use the 7 layer gasket.
Another shot closer up but a little blurry.
Here is the cometic 4.130" that clears easily.
Based on a racer's first hand experience (Arun) I'm going with the ls9. This cometic looks like a POS next to the ls9's BTW. I might add the cometics are more than twice the price.
I don't see an issue with the overhang here. I think problems are highly unlikely, I'd probably file fit it if I were worried to be able to use the 7 layer gasket.
11-27-2011, 05:09 PM
#25
Melting Slicks
Member Since: Mar 2008
Location: Houston/Dayton Texas
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i had both... I am running the cometices and its holding 26 psi... went from ls6, to copper to looking at the ls9 , then the cometices.. this was on a 3.905 bore thoguh.. but they differently are doing the job
11-28-2011, 08:24 PM
#26
Melting Slicks
FWIW, I think the LS7 gasket is a POS.
On the AFR 225 head I tested, the LS9 gasket fit fine, so we used it.
The car never popped gaskets again, the LS7 would leak on every cylinder.
On my own car-I used the LS9 gaskets-even though they slightly did overhang in the chamber-well, 160 mph quarter mile passes later there still in there with no signs of leakage.
The LS7 gaskets on other hand leaked after a few quarter mile passes with a soft tune.
LS9 for the win.
On the AFR 225 head I tested, the LS9 gasket fit fine, so we used it.
The car never popped gaskets again, the LS7 would leak on every cylinder.
On my own car-I used the LS9 gaskets-even though they slightly did overhang in the chamber-well, 160 mph quarter mile passes later there still in there with no signs of leakage.
The LS7 gaskets on other hand leaked after a few quarter mile passes with a soft tune.
LS9 for the win.
I ordered a set of LS9 gaskets
