Epic (but boring) story ahead!
Wondering if anyone has alot of experience with blown head gaskets on holden based V8's.
cast VN heads
Crankshaft rebuilders crank
Scat H beams
solid roller - cannot find cam card!!
VS factory clearanced block with 4 stud conversion and ARP head stud conversion
Torque Power shigh rise dual plane with holley 750 ultra HP
12-13 degrees intial and about 32 all up at about 3500 (IIRC)
makes 400hp at the wheels starts to fall over at about 6800.
Was at the track yesterday and popped head gasket at number 1 into the valley. It always seems to pump the water out into the expansion tank (20PSI cap) but doesnt recover all of it and regularly spews it into the engine bay. It holds at about 85 - 90C while on the track, but when I come in to the pits can creep up to 100 and eventually comes back to about 80. Normal driving/cruising see's about 80C.
The head gasket is a Felpro, and it seemed to be soaked in coolant. Head stud nuts were all tight when I was undoing them. There was moisture creeping up the longer three closest to the valley. I was told you are not supposed to use the holden sealant on ARP head studs(?).
Any suggestions regarding head gasket selection, use of Hylomar or anything else? The car does the odd bit of circuit work, but has been primarily built for tarmac rallies.