Today i put vems on honda s2000 stroker(2.7l) with sequential gearbox(quaife). Gearbox also has drum sensor.
Problem is that gear box has strange outputs(doesn't rise all the time).
So 1st gear is 0.98V, 2nd 0.37V, 3rd 4.51V, 4th 3.86V,5th 3.31V,6th 2.76V
But look at log, vems has problem with detecting gear.
http://www.vems.hu/files/DamirMuha/1.2.11/DrumSensorv3.3_u006633-2013.03.18-16.09.19.vemslog
Engine is off and it's easy to see voltage between gears that can use for shift cut.