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Old 07-06-2003, 11:21 PM   #1
yebokmj
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Default WRX headgasket an optiong?

I am going to put a new headgasket on my MY97 DOHC 2.5L engine and I am wondering if a WRX or STi 2.5 headgasket might be the better option over the new and improved DOHC 2.5 gasket? Anyone know if this would effect my compression to my advantage? A fellow member was saying that my timing will be thrown off by changing the headgasket size, any input on this? OH and ofcourse the heads are being o-ringed.
Joshua
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Old 07-07-2003, 02:19 AM   #2
8Complex

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The WRX gasket is not an option as it's made for a 2.0L cylinder size, not a 2.5L size. The USDM STi, though, might be an option, but I'm unsure if there is any thickness changes between them.
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Old 07-07-2003, 02:37 AM   #3
HndaTch627
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Quote:
Originally posted by 8Complex
The WRX gasket is not an option as it's made for a 2.0L cylinder size, not a 2.5L size. The USDM STi, though, might be an option, but I'm unsure if there is any thickness changes between them.
that or the gasket for a SOHC EJ25 would be the gasket to use IMHO

Jeremy
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Old 07-07-2003, 01:16 PM   #4
wac
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Quote:
The WRX gasket is not an option as it's made for a 2.0L cylinder size, not a 2.5L size.
Other than surely increasing your compression ratio, you need to check to see if the smaller bore of the WRX gasket will interfere with the valves, and if the WRX fire ring will even reach the 2.5L cylinder liner.
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Old 07-07-2003, 07:30 PM   #5
Z1 Performance
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The 99 gasket is frankly as good as anything aftermarket.....
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Old 07-08-2003, 02:53 AM   #6
HndaTch627
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Quote:
Originally posted by Z1 Performance
The 99 gasket is frankly as good as anything aftermarket.....
who would use aftermarket head gaskets?
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Old 07-08-2003, 07:11 AM   #7
Z1 Performance
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Many would, and many have.....in terms of the aftermarket units, the Power Enterprise ones are among the best quality units out there......incredibly strong, and can be retorqued countless times if the need arises.
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Old 07-08-2003, 12:41 PM   #8
HndaTch627
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Quote:
Originally posted by Z1 Performance
Many would, and many have.....in terms of the aftermarket units, the Power Enterprise ones are among the best quality units out there......incredibly strong, and can be retorqued countless times if the need arises.
if they are copper they are garbage, for race motors coppers fine, for daily driven cars it just doesn't work.
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Old 07-08-2003, 04:18 PM   #9
Z1 Performance
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They are not copper...I would positively NEVER use a copper gasket on anything.
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Old 07-08-2003, 04:18 PM   #10
Z1 Performance
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They are not copper...I would positively NEVER use a copper gasket on anything.
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Old 07-08-2003, 08:13 PM   #11
markus
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Default Re: WRX headgasket an optiong?

Quote:
Originally posted by yebokmj
A fellow member was saying that my timing will be thrown off by changing the headgasket size, any input on this
I did a quicky calculation once and determined that the impact on timing is fairly negligible (~3deg on a 2mm thick gasket IIRC), but it will happen.

Should you be concerned about it?? Can't answer that for you, but I would imagine that +/- 3 deg is well within the realm of an engine/ECU's tolerances. **shrug**
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Old 07-08-2003, 09:41 PM   #12
Wedge
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Quote:
Originally posted by Z1 Performance
The 99 gasket is frankly as good as anything aftermarket.....
Um... aren't 99-03 head gaskets the same part #?
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Old 07-08-2003, 11:39 PM   #13
smacksube
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why don't you just o-ring and get it over with?
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Old 07-08-2003, 11:57 PM   #14
yebokmj
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Default My gasket choice

I ended up going with just the new and improved stock DOHC headgasket for I deffinately didn't want to raise the compression for turbo use. I am O-ringing the heads before I install the new gasket. Everything goes together friday.
Joshua
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Old 07-09-2003, 02:15 AM   #15
HndaTch627
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adam- do you have any info on the PE gaskets?? i am curious because i will be using and EJ207 bottom end.

jeremy
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