I am running a modified M90. 10.5 pistons a 284 cam and porting etc. pulled 223RWHP and 236 torque. I am running Motronic 1.0 so a 6100 rev limit showed it was still going up at 6100 and dyno man felt it should get close to 250 RWHP at higher revs. The car pulls like a freight train once it gets on the cam at about 2500rpm All in allI am well pleased