In Reply to: Have you considered... posted by Jon on May 16, 2001 at 11:28:53:
Robbie Kollar has a prepared-class E36 M3 with cams, headers, OBD-I, Jim C sofware with Euro MAF conversion that puts out 311HP at the crank. A stock 1995 US M3 engine puts out about 270 crank HP with the Jim C software and Euro HFM. Actually I keep saying Euro MAF, but it's the same as a US 540i.
The M50/S50 engines are a much easier fit. The guy who made an E30 335CSi (S38 in an E30) had to shoehorn it in. You can get more power than the S50, but the big-six block weighs a freakin ton. I had one stripped completely, and I couldn't lift it myself.
I would suggest using a US M3 engine. They're esy to find, there are lots of mods available, and they can make great power with TORQUE, one thing a $12,000 280 HP S14 engine LACKS.