Yes, we use SCE copper gaskets and stainless orings. The engine has seen 90 passes plus dyno pulls with the same head gaskets. The first few hits we made, we took it easy, but after the first time or two, we went straight to 40+ psi. I think we are close to out of turbo at 48 to 50 psi. I wish I could make 55. Lol.
It's really hard to make a 2700+ pound car go 4.0's without sticking some air in it.
Our secret is that we never pull the boost back. If we want less power, we will run it richer or take timing out. There are some rare occasions that we dial back the boost in some areas of the track (Norwalk 2010 was one of those occasions), but it's rare.
TQ
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