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Old 08-17-2005, 08:20 PM   #1
jaxscuby
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Member#: 10613
Join Date: Sep 2001
Chapter/Region: South East
Location: S Ga / Hell Rock
Vehicle:
2002 USDM WRX
WRB

OMGHi2U my 91 legacy ej22t to ej25

so I am pulling the ej22t out of my legacy
to build a 2.5 from the 2.2.

I know that I will need rods & crank.
found out that the usdm 2.5 have the same crank
part number. the rods will be aftermarket..
already have pistons...forged..stock rings..

going to use wrx heads (since the price is right)
but 1 mm oversized valves, double springs,
ti retainers and my v8 type c cams.

plan to use vf36 with 1825 compressor wheel.
ecutek for em and either modded stockers (800cc)
or some other ones 750cc at least.

anything that I might have overlooked?
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Old 08-20-2005, 07:51 PM   #2
JonofScio
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don't forget that your crank will need to be a phase I crank... which I think all pre '01 EJ25 motors are that. You could also buy one from crawford... I know the 75mm cranks (EJ18/20/22) are only like $100, don't remember what the 79mm cranks are.

While you're boring your block out to fit those pistons, if you're going for serious - serious power, consider sleeving it as well. Maybe not worth your time, but hey, if you're hardcore or something... lol

Modded stock injectors flow low 700s to low 800s (in cc/min) depending on fuel pressure.

Do you think a rrfpr would be a good idea for your setup? (rising rate fuel pressure regulator) and you forgot to mention what fuel pump you are going with... the walbro runs a decent price and flows alot of fuel.

I would actually suggest getting the rod and crank setup from a company who does EJ22 to EJ25 stroking (or has the kit, which is basically what you need) look through crawford's website... check out others... ect.
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Old 08-21-2005, 11:52 AM   #3
jaxscuby
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the swap is going into my wrx..
the entire fuel system will be upgraded.

rc has done some testing for the shop and they
have been around high 79x to low 80x cc..

after doing some homework..rod lengths are different.
have to check stroke..

Last edited by jaxscuby; 08-22-2005 at 06:29 PM.
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Old 08-21-2005, 11:00 PM   #4
eastcoastbumps
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You need the center thrust crank. I'm positive a Phase I will fit but I'm not so sure about a USDM STi crank.
And you'll need a bigger turbo.
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Old 08-30-2005, 10:25 PM   #5
Whiteghost 2.5
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i will be following this same path (block wise) so you are saying that I could not use a usdm Sti crank or my 01 rs 2.5l crank for this 2.2L block?


Josh
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Old 08-31-2005, 12:08 AM   #6
ballitch
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i thought all EJ25 cranks were 79mm?
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Old 08-31-2005, 12:37 AM   #7
napphappy
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Your right all EJ25 do have a 79mm stroke but they are talking about where the thrust bearing is, I think.
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Old 08-31-2005, 12:59 PM   #8
Matt Monson
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'73 914 and 2012 BRZ

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Quote:
Originally Posted by Whiteghost 2.5
i will be following this same path (block wise) so you are saying that I could not use a usdm Sti crank or my 01 rs 2.5l crank for this 2.2L block?


Josh
That's what they're saying. You need to use a phase I Ej25 crank from a '96- early '99 crank with center thrust. Or get your block machined to accept an end thrust crank.

I have a '98 Ej25 crank available is anyone wants it. $100. And this crank has history. It is the original factory crank from Xephyr's '98 2.5RS from before it was a high psi high horsepower boosted monster. There have been like 10 engines in his car since then. But you could drive around saying," I've got Xephyr's original crank"
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