Yes the tach will read motor speed above 300rpm. The motor will have a 2 pulse per rev signal being fed to the arduino. this will do the math to turn that into a 60-2 reluctor wheel signal and feed it to the ecu. When the actual motor revs drop below 300rpm the arduino will maintain a 300rev signal to the ecu. Then when the motor revs over 300rpm it will revert to actual. Hope that makes sense
__________________
Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com