Boost anyone?

[scheides]

Damn that's a phat John Deere! :D

[Goat Blower]

270 psi would obviously be on a diesel.

[rst95eclipse]

That I do not know. However, I do know that all of the guys I saw running were required to have a cable fixed to their head so in case they blew their headstuds, the head could not fly away freely.

Wow. I guess they must O-ring the block.......

[b00stcreep21]

No, ARP's dawg!

[rst95eclipse]

I can't imagine they'd use anything else. And I simply can't believe that they don't O-ring running those pressure levels.

[Jakey]

I'm sure that they do everything to the block that is feasible. For the amount of cash that gets stuck into these things, nothing gets held back.

[Pushit2.0]

Their are companies that produce bolts/studs that are better then ARP's. ARP studs/bolts are not that strong, DSM head studs are only 190,000 psi and the other studs that I know of are 400,000psi tensile strength.

~John

[Goat Blower]

There's a lot more tricks than that. I've seen them add additional head studs to V8's even in regular boosted applications. It's funny how much they actually have to do to most production V8's just to turbocharge them, where our blocks and heads are incredibly robust for a small 4-banger.

[Super Bleeder!!]

Their are companies that produce bolts/studs that are better then ARP's. ARP studs/bolts are not that strong, DSM head studs are only 190,000 psi and the other studs that I know of are 400,000psi tensile strength.

~John

A1 studs?

[FattyBoomBatty]

In those uber high boost apps, they do weld the heads to the blocks. There was a thread with pictures of a straight 6 tractor engine that cracked the block in half right below where they welded it to the head. At least the head didn't lift.