Quote Originally Posted by Z3_GoCar View Post
M42's for the e30 318 from '90-'91.
Metric Mechanic claims about 170hp, for their sports 2000 motor:
http://www.metricmechanic.com/pdfs/m...ne-booklet.pdf
the 87mm pistons are more than the allowed +1mm, the head's been ported, and I've not checked the max lift spec. So, for the M42 it's a qualified maybe. The newer M44 is out because it's got one of those dual length intake manifolds (same as the 4AGE) that'll never make much more than stock power.
Hmmm, well, the 170 is for a 2.0L motor. And, there's a LOT in there that won't fly. As you say, the heads ported (6% better flow according to them), they're using non stock rods, pistons, valves, valve springs and more.

So, if thats the best I think it's an uphill battle at 2665lbs.... compared to a CRX at say 600 pounds less,