recently purchased a 90 S2, know it has stage 3 head, piper cam, race clutch, new garrett turbo(think standard t3) but not sure what else, previous owner mentioned uprated ecu but had no evidence.

Was having a good look round today, took ecu apart, and chip had motorola logo on, so thinking it not chipped?? On closer inspecton I came across a bleed valve!! (which Id rather not have) does this mean that the ecu has must have been uprated/chipped to compensate higher boost??

I dont currently have boost gauge, so dont know what running at, but will get one asap.

Other question is, If its not chipped, and i buy a chipped ECU, can I just plug it in and use, or does it have to be set up on rollers??

sorry if these are daft questions, newbie alert, please....be gentle