eta block, custom 9.1:1 pistons, 325i head and manifolds
dynoed at 148whp at 5150 with chipped motronic 1.0
ecu:
MS1 Extra (high-res firmware with a couple of mods)
(2.2 board with BIP373 and VR sensor circuits added on)
60-2 trigger wheel with vr sensor (retrofitted from 325i)
GM air temp sensor
stock coolant sensor
stock coil/distributor
3 bar FPR
stock injectors
2x 3-ohm 25-watt resistors for injector current limiting
stock ICV/ICM/CSV
stock O2 sensor
In retrospect, I probably should have used a 3.0 board, as getting the 2.2 ultimately did not save any time or money after the needed mods for this application.
The MS is connected to a 35-pin Bosch connector, early version of the harness seen here:
Only the wiring for the VR sensor and IAT was run separately.
UPDATE
Dyno:
There was a modest power gain. But the VE table needs more work, as it was too rich at 3500 for instance. I have picked up a few mpg with MS, managed to hit 30mpg highway. Tables used for the dyno run:
