Thanks for the R16 tip, I recently made that change and yes it's well worth it! Noticed a 3MPG increase and some improved "revving" above 3k RPM here in 90+ Degree, 90+ % humidity, 93 Octane, swampland...
Um.. er, I mean Florida...

I may use the R16 hookup with the dial pot with the M62 as a timing retard

I'm still having off the line and cold start issues. It starts really rough and has almost no power under 2k RPM with the AC on. On a cold morning with the AC off it "jumps" off the line and really get's going, but when it's hot with the AC on, I can put my foot to the floor off the line, count to three and still be under 10 MPH until it slowly climbs up to 2k+ RPM, it takes off.

I have a sneaking suspicion that I'll be converting to a 5 spd sometime soon. If for nothing more than "fun" factor.

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1990 190e 2.6 (About to have a Kompressor )