I bought my '91 M42 E30 4dr maybe 15 years ago for DD duties with future plans to transplant the eng/trans into an older, carburetored non-BMW non-OBD vehicle. However, the E30 is still treating me well even with 250-300k on the odo (est). Having just completed the installation of an E46 steering rack, I love love love driving this car and am reluctant now to dismember it. I still want to put an M42 into the other car, but am shopping around for one now instead of offing the E30.
So, the question is, which cars had the most advanced versions of M42/44 technology? Would like to keep it stock, not in the mood for crank swaps etc., but would be interested to know what bolt-ons bring improvement in case I should locate several different engines to choose from.
I already know about the timing chain idler sprocket (BTDT) and the M42 heads replace the less reliable M44's. Priorities would be: 1. Reliability 2. Ease of installation/integration, and 3. Torque/HP/driveability increase.
Topic: What's the pinacle of M42 development? (Read 2666 times)