In Reply to: No power above 5000 rpm/ Need //M3 Guru posted by Bob on June 10, 2000 at 20:54:02:
Sorry, not very good advice from me but a couple of things. Our engines pull the hardest from 4500 to 7000rpms, so definitely your buddy's car is going to feel very slow.
I would've suggested trying another DME (ECU as you say) but you've ruled it out. Any chance that it could be cap/rotor/wire related? Another cause for slow S14's is the throttle position sensor (you've replaced it) but is it adjusted properly? It should click just as you come off idle, try it out by manually opening the throttle and listening for the click. I'm out of advice and it might not be the correct advice anyway.
Try contacting one of the Roundel advisers, Fillipo at bimmers.com probably can advise you best. Give him as much info as possible.