Just for the record, cometic head gaskets are shit compared to other gasket manufactures, but the still work. I didn't deck the block or head, because they were straight. My surfaces were cleaned by hand. I also didn't use copper spray, i did use gray rtv around the timing cover. 20, 40, 60, 80, 80. I was on a budget and FRsport came to the rescue. At the shop we only use cosworth gaskets or whatever a customer requests which is usually Apexi, but I wanted to get studs also so I decided to use the cometic HG, and see if there really was an issue when not decking or having a super mirror surface. The conclusion is there is no issue with sealing the head to the block and it's all just a matter of preference.
Quote:
With nearly 200k miles on my motor my head gasket finally gave way, it's had a GT2871R on it for 120k of those miles running at least 15psi the whole time. Forge Motorsport External wastegate is rock solid boost until 20psi then it gets a little fuzzy, also evidently kills paper headgaskets from 1991.
Plan is:
Cometic MLS headgasket
Poncams
ARP studs
new oil/water pumps
Tomei RAS
It's got a JWT ECU, Z32 MAF, and 740cc injectors. AFC-Neo to correct for cams and fine tune.
Any suggestions for while I've got the head off? Hoping to get in the damn near 400whp club with this setup.
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Have jwt re-tune the ecu if you need to use the afc for the poncams, poncams are not that aggressive.