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Old 11-25-2003, 02:17 PM   #1
Ahzlon
Scooby Specialist
 
Member#: 45216
Join Date: Oct 2003
Chapter/Region: NESIC
Location: Essex, Vermont
Vehicle:
2005 Baja Turbo
Silver

Default Bore/Stroke.. Port n' Polish

This thread has proabably been beaten to death... But here it goes anyhow...

I have a good chance on getting my hands on a nice ej25 out of a wrecked subaru that is a SOHC .. now if I Bore/Stroke this thing and do some head work on it.. could i just swap it out with the ej25 SOHC that is in my RS and use the stock ECU even after the modifications to the engine and not have to reflash the ECU??
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Old 11-25-2003, 11:26 PM   #2
atabert
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Member#: 45107
Join Date: Oct 2003
Location: you dont want to know
Vehicle:
1992 Legacy L
Green

Talking swap

well im in the process of doing that right now, ive got a 2.5l shortblock and im using 2.2l heads which ive ported and polished,a 2.5l intake plenum so i can use the 2.5 injectors while using the stock 2.2l/92 legacy wiring harness which im going to put it into. i dont think it will make it any worse than stock, i just think it will probaly change when and how long you make power, your engine size isnt changing your just changing the powerband and you probaly will make a few ponys but not enough to fell without manipulation of the electronics.but just making the engine breathe better will definitely help. i am going to be gaining .3litre so i might have a bigger horsepower change, i plan on dynoing before and after to see what the difference is, let me know your opinion
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Old 11-26-2003, 01:23 AM   #3
GTBGUY
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Member#: 2003
Join Date: Aug 2000
Location: Calgary, Alberta, Canada
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'99 BGP Legacy GT
'98 QS Legacy L (auto)

Default

Ahzlon - You're pretty close to being max bore and max stroke size. To bore the block anymore, you'll have to press in some heavy duty sleves. To stroke the EJ25 more, you'll need a different stroker crank.

Drop the guys at TWE an email, I'm sure they'll have something that'll suit your needs.
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Old 11-26-2003, 01:38 AM   #4
Ahzlon
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Chapter/Region: NESIC
Location: Essex, Vermont
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2005 Baja Turbo
Silver

Default

thanks GTBGUY.. ill drop them a line
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