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Old 04-26-2006, 05:32 PM   #1
ROC pit-bull
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Join Date: Aug 2004
Chapter/Region: Tri-State
Location: rochester ny
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1995 legacy L
white

Default Q. Bout Crankshaft

I need to know if a crank from a NA motor can be used on a turbo engine?

also will a crank from late 90's work in a ej257 block? If anything else needs to be done please don't leave that out..
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Old 04-28-2006, 11:31 AM   #2
bugeyes
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2001 V7 sti

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I have researched this and have spoken the mechanic guys at MRT and Rigoli. Yes all the cranks are the same material (that includes n/a, wrx and sti). The only difference being the phase 1 and phase 2 types where the thrust journal is different and rod journal diameter.
And to add, here in Aust we didnt get the 2.5L sti till this year so we were running 2.5 n/a engines cranks and blocks for turbo builds.
Your question regarding late 90's crank in a ej257 should be ok. Of the top of my head they changed from phase 1 to phase 2 around '96/'97.
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Old 04-30-2006, 07:11 PM   #3
Scoobie Steve
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Subaru L Ver 6 STi Type R

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DOHC 2.5l NA engine Phase I Has unique rods.
SOHC 2.5l NA engine Phase II

The change over happened around 98-99 but there are some bastards out there.
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Old 05-01-2006, 12:13 PM   #4
MY99 2.5GT
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05 Legacy GT 06 Armada

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Phase I EJ25 crank has slightly smaller big end bores. Pauter Rods website show the correct diameters:

http://www.pauter.com/subaru.htm

After talking with Crawford Performance they made it sound like all Phase I cranks will fit Phase I blocks.

As well Phase II cranks will fit Phase II block but require machining.

However Phase I cranks will will not fit Phase II blocks.
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Old 05-01-2006, 09:36 PM   #5
ballitch
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98 cam'd EJ251
Wrx Tranny,slowr than ish

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whoa whoa whoa.....then why can you put a phase I EJ25 crank into a EJ22 block to stroke it......or is it that the EJ22 block is also phase I?


~Josh~
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Old 05-01-2006, 10:27 PM   #6
Scoobie Steve
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1998 11.87@112mph
Subaru L Ver 6 STi Type R

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EJ22t block is 1994 era...Phase I
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