99mongooSS

iTrader: (4)

How thick of a head gasket are you guys with prochargers or turbos running? And how many #'s of boost are you running with them?

stevieturbo

boost is irrelevant

Most gaskets available range from 40 to 60 thou

99mongooSS

iTrader: (4)

so if I was to run an 0.051 head gasket with 15-18#'s of boost it wont blow the gasket from pressure.

Reject

iTrader: (24)

just asking>>> what heads are you running?

99mongooSS

iTrader: (4)

prc LS6 70cc stg 2.5

Zombie

iTrader: (2)

Do you mean the 18 psi from forced induction or the 1000+ psi of normal combustion?

What is your cyl pressure going to be at 18psi on a normal burn? What about when it detonates? Detonation will cause your cyl pressure to spike to 3000+ PSI in really bad cases. That's when stuff starts to let go.

99mongooSS

iTrader: (4)

15-18 psi of boost from an ATI F1. will a head gasket that is 0.051'' thick going to blow with that amount of boost. Take into effect that I am building this setup with the W2W 1/2'' head studs. I just want to know if I can run a thick head gasket like that or do I need to use like an 0.030'' head gasket.

njc.corp

as i am new to this fi section- can u tell me why boost is irrelevant- i am not making fun of what u said just want to have a better understanding as i thought boost and head gasket choices was very important-

thanks in advance-

njc.corp

very interesting- never looked at it from that point of view-

Zombie

iTrader: (2)

I'll simplify it as stevieturbo did:

boost is irrellevant.

Run what ever gasket you want to, no amount of boost from forced induction could ever harm a head gasket. Detonate the motor at 2" vac and you can destroy a gasket though. Boost is a horrible way to measure things, 18psi of "boost" on your car != 18psi "boost" on another car with 400+ cubes and heads that flow 360cfm at 7000+ DA. It's much better to talk about head gasket reliabilty at a given horsepower level.

Your biggest concern will be lifting the heads at the 900-1000 HP level which I still believe is caused by mild detonation (cyl pressure spikes) on most setups since it is often cured by backing off the timing 1-2 degrees.

geeteego

iTrader: (1)

Mine lifted at a lot lower HP level...~750 flywheel.

phildo

iTrader: (7)

Didn't you also have a stock shortblock? (ie. higher compression 9.5-10.5)

stevieturbo

As others have indicated, detonation etc will kill any gasket regardless of power or boost.

So keep the tune safe, and it will hang together, assuming its a decent build.

I ran my 382 for over a year, and about 10,000 miles before I had a problem, and that was lack of meth related...hence detonation.
No idea of power though, but it was trapping high 140's on pump fuel+meth

geeteego

iTrader: (1)

I did. Not the brightest idea.

99mongooSS

iTrader: (4)

ok thanks for the info.