well..i found and read this article on nasioc...that this guy did a swap without much problems....well basically he said he used the stock wire harness and...it worked...well..if anyone knows if it does or if it doesnt...let me know...here is the web site... http://forums.nasioc.com/forums/showthread.php?s=&threadid=383415 well..thanks for looking wagonL
i ahve read this and heard of other people doing similar swaps. apprently impreza ecus (NA atleast) are very accepting of swaps. i have heard of this going both ways with a 1.8l ecu running a 2.5NA and a 2.5 NA ecu running a 1.8T. i am sure that if you had the correct ecu and wiring it would probably work alittle better. although the 2.5ecu on the 1.8T might be an easy answer to gettign more fuel into the engine.
well..if i do, do this swap..i was thinking of using the 2.5l ecu..and fuel pump and for the ecu...maybe just wiring it so it can perform better..well..goodluck to me.. wagonL