hi i have a 1992 wrx i blew up my engine and i got a engine of a mate once we fitted the engine the car seemed to be lacking power the only thing he could think was that he had a bigger up pipe and this would not spool my turbo up correctly has any one got any ideas the engine was running at just under 350 bhp but its all back to standard in mine,steven

 

Have you swapped ECUs?

 

no its still the same one that was in my car

 

different engine/turbo you'll need it mapping