My friend got me in to the E30 world and he has or is going to do just about everything you can do to an E30. he has one that is turbo that pushes 250hp at the wheel, i know because i saw it on the dyno. that was with out engine management. now he is working on a m50 swap with single vanoce. he told me not to even try to build an N/A m20, that it would be a waste of money.