pa38112
Well Known Member
I just replaced my Vans analog tachometer with a MGL rpm-1 unit. I installed a Hall Effect sensor on one mag and also kept the vans sender as a secondary source. I set up the tac for 1 pulse per revolution on the hall input and 4 pulses per revolution from the Vans sender. They both give the exact same RPM readout. Can I assume this is accurate? When I compare to a photo tach that I have the photo tach reads 5% higher, but I would think that 1 pulse per revolution is 1, especially when it matches exactly to 4 pulses per revolution from the secondary input.