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Old 03-26-2005, 04:51 PM   #1
QksilverRS
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Member#: 16826
Join Date: Mar 2002
Chapter/Region: NWIC
Location: Lacey, WA
Vehicle:
01 STi DOMINATOR 3
444 WHP 431 WTQ

Default is it possible?

i have heard rumors of putting a different head gasket (cometic) in the EJ25 to bump up compression....anyone have info?
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Old 03-26-2005, 06:05 PM   #2
cabe
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Yes, it's possible, sorry I don't have any info.
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Old 03-26-2005, 06:26 PM   #3
staticfritz
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yes, Storm had some he ordered. pm him and see if he still has any. they are about $100 and should bump your CR by about 0.5 or 1.0 (can't remember exactly)

they are by cometic, you are correct. look in the classifieds too, i'm pretty sure someone there had an extra set.
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Old 03-30-2005, 10:39 AM   #4
Crawford Performance
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The phase one head gaskets are .060" thick, with the phase two at .020".

The cometic are .040" or .051", using either of these will raise your compression, change your cam timing and possibly result in a piston to head collision.

Be carefull, everything comes at a cost

Quirt Crawford
www.crawfordperformance.com
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Old 03-30-2005, 12:51 PM   #5
Seeinstars
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2004 jbp forester xt

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I'd used sti headgaskets on mine, there twice as much money, and messure a little thinner. I went into my engine later on to put new pistons in it, and those sti gaskets compress to the same as the stockers. DON'T waste your time with this issue, its not worth it. I've had a rod bearing spin and just the little bit of space the bearing made cause the piston to slap the head. There's not much room for error when your playing around with your different gaskets.
Just put whats recommended by subaru!

-mike
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Old 03-30-2005, 05:11 PM   #6
Crash477
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I have a Cometic .027" head gasket for an EJ25 for sale. I will sell it for $95 shipped!
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Old 03-30-2005, 06:19 PM   #7
Crawford Performance
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Location: Oceanside
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Quote:
Originally Posted by Crash477
I have a Cometic .027" head gasket for an EJ25 for sale. I will sell it for $95 shipped!
Is the .027" gasket a custom made part?, I don't see it listed on their web site.

Quirt Crawford
www.crawfordperformance.com
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Old 03-30-2005, 06:50 PM   #8
Matt Monson
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My numbers show a phase I gasket at .152 and phase II at .058
I have the .027 Cometics in my car, and no piston to valve clearance issues. The important thing is you don't go with a thin HG on a phase I engine where the pistons clear the deck...
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Old 03-30-2005, 10:29 PM   #9
Crash477
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1989 BMW 325is

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no, its bought from cometic..
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