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Old 10-21-2008, 12:26 PM   #1
2.5rsDOHC
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Impreza GC8 wiseco cant help, who can?

"Hybrid EJ22 with EJ25 DOHC Crank & Rods"
this is a wiseco stroker pistons set
part # - K602M975

I have this setup with my98 DOHC heads and phase2 head gaskets
this should according to wiseco yeild an 8.5:1 c/r

so my question in what should the psi read durring a compression check?

btw wiseco has been no help in the matter
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Old 10-21-2008, 02:46 PM   #2
Vmiz
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reason they may not be able to help is the fact of compression readings will be different having to do with the altitude you are at and also cam timing will change that reading,
for instance as on my 12.1 motor advancing and retarding cam timing let the compression range from 180 to 240 and that was in a range of only 7 degrees of change.kind of a hard number for a company to pin down
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Old 10-21-2008, 05:18 PM   #3
2.5rsDOHC
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so what should I do to be able to tell if Im losing compression if theres not a certain psi range to be looking for
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Old 10-21-2008, 05:36 PM   #4
Storm
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A leakdown test would help.

Jay
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Old 10-21-2008, 09:29 PM   #5
BoostInc
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test all four cylinders. if they are all in a range within 20 or so your good. But guessin i would say anywhere from 120-150 maybe lower, its hard to say
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Old 10-22-2008, 12:36 AM   #6
silentt
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Quote:
Originally Posted by BoostInc View Post
test all four cylinders. if they are all in a range within 20 or so your good. But guessin i would say anywhere from 120-150 maybe lower, its hard to say
20 or so? That's a pretty big discrepancy...
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Old 10-22-2008, 03:05 AM   #7
IllNastyImpreza
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awesome little settup. is it the ej22t block with sti internals ?? or just NA ej22 with your stock rods and crank ?
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Old 10-22-2008, 08:13 PM   #8
2.5rsDOHC
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would a leak down test be as accurate as a compression test?

yeah its a EJ22t with a phase1 EJ25 internals
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