I will be needing to replace my head gasket soon I am looking in to replacing the standard head bolts with high tensile studs.
so how strong do the studs need to be.
8.8 threaded bar is available all over the place, is that strong enough. I don't want it to stretch. As I am in two minds weather the current head bolts have stretched or not. I haven't started the full diagnostic procedure yet. So this is just a pre emotive question about replacing head bolts with head studs to allow me to run more boost.
Any thought would be good.
The reason I mention the threaded bar is head studs are stupidly expensive for a set.
I know you can get ARP 203-4204 head studs for an mr2 engine but you need two sets of them for the 6a13tt engine @peter Thompson used these for his engine.
You can also get a set for 6a13 from rpw which has the correct quantity of studs, but that is $450 NZ.