Go to the datalog tab and make sure the wideband is checked in the PIDS display. I assume it is because its displayed on the dash. Its been too long since I've messed with BE I don't remember anything else.
Well IDK. If i put it on the MP3 the rotor pack gave up at 2 passes down the quarter mile. I looked at a blower here with my old rotors and there was a black coupler on it. I think I put it in a blower that went on a Marauder. I think it would be fine. If I remember right it had a nice tight fit.
The early model MP cut off the back of the blower and attached a plate with the big smiley opening. I had the bearing bosses fracture and had Embry Machine fix one then the other side broke. I lucked on a AR kit and never looked back.
I don't recall the namings but the 1st iteration of the MPX was a modified stock case, which I believe turned out to have case problems at the back bearings. At least mine did :). So then MP cast a whole new case for the final MPX product.
I think you are referring to the MP S port which is a modified early blower if i recall right and the MPX is a whole new casting. the MPX would be the greater blower.
I did't do any searching so I may be wrong on the names.