which head gasket for twin turbo?
Thread Starter
Joined: Jul 2002
Posts: 2,789
Likes: 0
From: NOR CAL USA
Car: 89 iroc-z 5.7tpi 350,
Engine: 5.7tpi 350,
Transmission: T-56
which head gasket for twin turbo?
what head gasket should i go with im going to be putting twin turbo's on my 89 iroc l98, its gonna have a few mods nothing major, headers, rocker arms, port work and super ram
what is going to be a good head gasket that i dont have to change ever 5K miles but will hold up to the pressures i will also be having arp head studs
what is going to be a good head gasket that i dont have to change ever 5K miles but will hold up to the pressures i will also be having arp head studs
Senior Member
Joined: Dec 2003
Posts: 829
Likes: 0
From: SE PA, USA
Car: 89 Camaro IROC-Z
Engine: Intercooled Twin Turbo LQ4
Transmission: Tremec TKO 600
Stockers doing great for me with 6psi of boost from TT's, nearly 9k miles on the system now. I have also run a few test runs at 10psi, I plan to go to the track with 10psi once the weather cools down here.
If you don't detonate, I believe the stock headgaskets should hold up well.
If you don't detonate, I believe the stock headgaskets should hold up well.
Member
Joined: Apr 2004
Posts: 467
Likes: 1
From: on the street
Car: 92 Formula 350
Engine: L98 with a T-76
Transmission: ArtCarr 700-R4
Axle/Gears: Bone stock 10bolt and 3.23's
I have copper head gaskets and i have had not one problem. But I'm pretty sure you have to o-ring the heads or the block. I o-ringed the block while it was out.
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Member

Joined: Mar 2000
Posts: 409
Likes: 0
From: Land O Lakes, FL
Engine: 5.7
Transmission: 700R4
Axle/Gears: 3.27
I had my felpro head gasket start leaking fluid while still NA but I'm adding a turbo now so I am changing them out with cometic. I hear nothing but great things about cometic.
http://www.cometic.com/
They are real popular in the r i c e r boost crowd also.
http://www.cometic.com/
They are real popular in the r i c e r boost crowd also.
Senior Member
Joined: Jul 2003
Posts: 509
Likes: 0
From: Detroit, MI, USA
Car: '82 Trans Am
Engine: Blown 540 BBC
Transmission: TH475
Axle/Gears: Dana 60, 4.10 w/spool
I also recommend an MLS type gasket, such as Cometics. While they are expensive, they are also reuseable. About time Fel-pro came out with a version.
Supreme Member
Joined: Feb 2005
Posts: 1,034
Likes: 0
From: Fort Lauderdale, FL
Car: 91 Camaro RS
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 2.73 Posi w/Disc
...and on a side note: intercool those turbos. You'll reduce the likelihood of blowing the gasket -- not to mention overall better operation.
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