A new weight won't help if it already can't get to the weight it's at. A new weight would help the Z3 though... But the only way weight will drop is if it's shown that the standard gain is optimistic in this case, and it's been repeatably demonstrated that this can never be shown sufficiently enough. I think the M-44 and the Toyota 4AGE share some of the same basic problems and will forever be a tweener motors, IMHO. I wish that wasn't the case, because in the scheme of things they're both good motors connected some great chassis'. So, if you really want to build an e-36 318i into an ITA car, I say: Go forth, and let it be so! Because you will only be satisfied racing the car you want to race.