1hz Head bolts

[boosted105]

So if they made 1hz-t the head bolts must be the same? So you reckon around 30 psi should be fine?

 

[bjowett]

I believe the bolts are the same. I still prefer studs.

 

[Locked79]

@Joshua Thorsen

Std Head bolts will take 50psi. There's a couple of fte's making good power, ones at 550rwhp and the others at 680rwhp. 1hz and 1hdfte share the same bolts. The one making 550 is still on std head bolts.

300hp is achievable on a 1hz, I've seen a couple and they were holding up surprisingly well.

JB Automotive in Ayr can get the Arp head studs, but I believe the price was up around the 1k mark too.

 

[Locked79]

Also, i dont think you'll get 300rwhp at 30psi. 300 at the fly, maybe. The 1hz setups i saw were running over 40.

 

[boosted105]

Also, i dont think you'll get 300rwhp at 30psi. 300 at the fly, maybe. The 1hz setups i saw were running over 40.

So you think with a good tune it would be safe to run 35ish pound no worries? Because some people I talk to say any more than 30 will lift a head on a 1hz but thats why I asked the question as I was always skeptical about that.

 

[bigspeed]

Arp studs are the way to go if you have tty bolts they cannot keep tension with the 680 degrees pre turbo temputure cycles and gturbo boost. I am waiting to hear from arp USA if there is a kit available or some sort of universal .Australia has arp studs for 1hdt,1hz.. but arp themselves in USA no listing..maybe someone can comment on this.

 

[Themcfarland]

what type of tune? My 1hz-t is all mechanical