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Old 04-14-2009, 11:08 AM   #1
scprs
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Member#: 172359
Join Date: Feb 2008
Chapter/Region: MAIC
Location: virginia
Vehicle:
2005 STi
PSM

Default CP pistons in a ej255

Ok so im undergoing my hybrid build and have all the supporting mods. I just have one main question.

I have a brand new oem 05 sti ej255 block and orginially wasnt planning on messing internally and have a conservitive tune with many supporting mods. However would like to go more power in the future and found great deal on CP forged pistons standard bore.

Im going to get new piston rings but would like to know can these just drop right in, in an untouched block? I may add these came out of a crawford s2 block and IAG was holding them for the seller. So they are in great condition.



Only helpful input

thanks ahead of time
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Old 04-14-2009, 01:41 PM   #2
scprs
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anyone?
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Old 04-14-2009, 05:46 PM   #3
Artie@Agile Auto
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theoretically speaking yes. But no one here will be able to say for sure, unless they take a measurements.
there is nothing wrong with used pistons
measure the piston to cylinder wall clearance, check the condition of the hone, gap the new rings, drop that pistons in.
good luck with the build
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Old 04-14-2009, 08:54 PM   #4
Fongers
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Just "dropping in pistons" without bore matching and ring grinding/gapping is asking for trouble in IMHO.
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