This past weekend during a 5 hour long local club fall color tour along various roads and speed ranges, I had the opportunity to really try out the Morgan since changing the exhaust and ECU, and what a difference! After ditching the Stage one pipes a month or so ago in favor of a home brewed straight through system with 2" pipe ahead of the resonator and 1 7/8" behind, I was much happier with the quality of the sound (still a bit loud, though!). Engine seemed happier as well, behaving better on light throttle in particular. But the big change came when I replaced the ECU with an unlocked unit from Garage 56. After 3 iterations of driving the car about 50-75 miles then merging the base injector map with the adaptive map (using S&S's free software), the car is now so much more pleasant to drive. It can now "walk" away from a standstill and potter around at low speed, then accelerates cleanly up to the rev limit. Easier to heel/toe as the engine responds nicely to even minor throttle blips. No more hesitation/bucking on throttle application after coasting either. Much more civilized all around, especially in traffic. No data to back it up, but performance seems moderately improved as well. Data I do have is that exhaust temp measured near the head is down about 30 degrees F when measured at hot idle with an infrared temp gun, so it appears the mixture might be richer at idle. No apparent soot in the pipes after 400 miles, however.
