I agree with you Dan about the ideal being a properly mapped ECU and perhaps these folks will get to look at that later on. But we must remember that the S&S VFI module in the M3W is predominantly Closed-Loop, which means it can adjust the fuelling to keep track with the pre-programmed 'goal' by increasing injector durations - admittedly within relatively narrow parameters - to keep good mixture control. I' hope that the increases in fuelling required to maintain safe AFR's for this type of kit should be within the capabilities of the factory ECU self-adjustment scope.
R1nga, good afternoon...
The Harleys are closed loop as well, but use narrow band O2 sensors, not wide band. The narrow band sensors do not allow enough variation to be read and then compensated for. The adjustment needed is just not there.
I'm not sure what O2 sensors are used on the M3W. If they are wide band you "may" have enough adjustability to compensate, but my guess is it cannot cope with the major leaning taking place with the exhaust and air cleaner being of a more free breathing design.
This is still early for M3W and the production numbers do not jump to a profitable market for "tuner" companies to address the issue. 3 or so years of M3W production and just over 1k cars versus a new Harley model with new style ECM and 30k bikes in 1 year. I know if I were a company doing this type of work I'd concentrate on the 30k and not the 1k potential customers.
But we know someone is doing it for the factory team so it will eventually trickle down to the production cars, but not very quickly in my opinion.
I too like the looks of the new pipes and again, these with the air cleaner will make a big improvement in your seat of the pants dyno, but with possible repercussions to the life of the motors.
