i was wondering, how many people have done the swap? what was cost like? problems? and dyno proven power?


while an STi would be sweet, most people just dont have the option of trading up

 

No one has a 2.5l in their wrx..unless they have traded down from an RS. The 2.5L turbo is to be available on the upcoming STi exclusive to North America.

Several though have had done the 2.0L Sti swap into thier WRXs..like alfriedesq and a few others.

 

Not trying to hijack the thread, but in my wildest dreams I would like to get the COBB short block and valve upgrade. Their stage 3 has the 2.5L shortblock on it. Has anyone done this? And what kind of turbo does it require to get good performance?

Thanks

 

there atleast a couple people with the 2.5, though they're not talked about much. cobb tuning's cone basher wrx has their built ej25 in it. imprezer is currently working on an ej25 i think and i'm planning on putting one in my car. just cause its not talked about doesnt mean it doesnt exist

etchy, it really depends on what kind of powerband you're trying to create. cobb released dyno plots of their cone basher with the sr40 and sr50. iirc, happy is running a t66 with his built ej25 (also from cobb). vishnu's turbo kit for the rs uses a t3/t04, which comes in many different trims.

 

What kind of psi can you run in an RS. I don't have one, I've always wondered what kind of pressures were being pushed through the engine.

Thanks

 

im not talking about a stock 2.5l, im talking a built up ej25 block.

 

IIRC, you can only run about 9 PSI in a stock RS 2.5 motor because of the higher compression ratios.