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Old 06-10-2002, 03:21 AM   #1
annointed
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Join Date: Apr 2001
Chapter/Region: Tri-State
Location: Atlantic City, NJ
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FXT 11.6@118 93 oct
NSX 450 whp SC'd (93 oct)

Default STi Ver 6 forged pistons in '94 WRX?

I doubt they'll fit, but since I have a great deal on some STi Ver 6 forged pistons, here goes...will they fit my '94 WRX?

Also, does anyone know if the front diff on the regular (non Type R/RA) STi is a LSD???

Thanks,

Mark
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Old 06-10-2002, 04:50 AM   #2
go go go
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bore and stroke hasn't changed.
Ver6 STi has a compression of 8.5, non-STi WRX of the same year was 8.0.
94 was 8.5 regardless of STi or not.
I cannot tell if you'll gain or lose compression after this swap because I'm not sure how the head is different.

non-STi or even STi didn't have LSD in front. Just regular open diff.
Limited had helical LSD.
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Old 06-10-2002, 08:51 AM   #3
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There's been a few LSD's listed for sale on yahoo of Japan lately for anywhere from $200 to $500 for either a used or a brand new unit depending on what your after.
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Old 06-10-2002, 02:11 PM   #4
HndaTch627
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the only issue i see is that the 94 is a phase 1 block IIRC and the Version 6 is a phase 2 block....with that being saidm, if the same applies to their rod's and pistons that does to the 2.5 phase 1 and phase 2 then they will not fit...why you ask?? the phase one piston pin location was different from that of a phase 2 piston. putting a phase 1 piston in a phase 2 block will result in the piston coming past the deck surface. However you MAY be able to put phase 2 pistons in a phase 1 block and just lose a little bit of comrpession while gaining the new psiton design...but then again i may be WAY off here.

jeremy
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Old 06-10-2002, 02:11 PM   #5
HndaTch627
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'09 Concours 14 ABS Black

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the only issue i see is that the 94 is a phase 1 block IIRC and the Version 6 is a phase 2 block....with that being saidm, if the same applies to their rod's and pistons that does to the 2.5 phase 1 and phase 2 then they will not fit...why you ask?? the phase one piston pin location was different from that of a phase 2 piston. putting a phase 1 piston in a phase 2 block will result in the piston coming past the deck surface. However you MAY be able to put phase 2 pistons in a phase 1 block and just lose a little bit of comrpession while gaining the new psiton design...but then again i may be WAY off here.

jeremy
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