Quote:
Originally Posted by montauk
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I used the same Variohm sensor from Digikey as Montauk used, see his link in the quote above. This unit is made for mounting holes spaced 32 mm or 38 mm apart. For the RHD ITB's, I used the 32 mm version.
The Hall effect TPS arrived today and I got busy and installed it in the same location as the existing BMW TPS on the cylinder #3 ITB. The throttle valve shaft protrudes 3/4 inch from the end the throttle body, so I fabricated a 1/2 inch spacer out of aluminum bar stock (1 1/2 inch wide x 2 inch long x 1/8 inch thick, sandwiched 4 pieces) with a 1/2 inch hole in the center and 2 x 1/4 inch holes centered about the 1/2 inch hole and spaced 32 mm apart.
I removed the 1,2,3 ITB's to get better access to the TPS.
The existing TPS set up.
The existing TPS removed showing the throttle shaft with D protruding 3/4 inch out of the throttle body.
Test fitting the 1/2 inch spacer block.
The Variohm TPS installed on the 1,2,3 ITB's.
A page from the Variohm Datasheet showing the wiring diagram - for my application I used the CW sensor connections.
The 1,2,3 bank ITB's re-installed with the Variohm TPS and the IAT sensor.
Re-calibrated the TPS on TunerStudio for the new Variohm TPS.
The TunerStudio dashboard while running the engine with the Variohm TPS and the IAT sensor.
Engine running with the Variohm TPS and IAT sensor installed.
