Just remeasured my Bosch ECU: 43 degrees at 750 RPM, 45 degrees @ 3,000 RPM.

One thing I've noticed is the needle jumps very unsteadily with the Bosch ECU as I'm opening the throttle plates (turning the curb idle screw). You have to wait a second or two for it to stop quivering. Don't know if all Bosch ECU's do that, or if #5939's is sick.

Bill Robertson
#5939