[dap930]

This is what I did for my MS3/MS3X installation. I cut a section out of 3" exhaust pipe and tack welded it to the outside edge of the air pump cog pulley. The 3" exhaust pipe is the correct radius for the pulley. I drilled several holes through the area where the metal strip would set to help off set the weight of the strip prior to welding it in place. Set the engine to TDC with cylinder #1 in compression to locate the metal strip on the pulley in the quadrant before TDC. Also, be sure to know which direction the pulley turns when you turn over the engine.



I purchased a Cherry hall sensor and located a through hole in the scavenger pump cam housing. The Cherry sensor does not require a pull resistor, just a 5 or 12 VDC input, sensor ground and a 5 VDC output signal to MS3.



In Tuner Studio I used "poll level" for the cam input sensing scheme. This allows the program to take a "poll" when a cam sync input is required without you having to input exactly what degrees BTDC the cam sensor will send a signal in Tuner Studio.