so i redid my ignition and have all MSD and so i bought a new tach. it is a stewart warner ultra-shift light- 13,000 RPM and i've got it so the lower rpms look accurate to the sound, but i cant get the higher rpms accurate, just wondering if someone else has one or has had to set up the Pulses Per crankshaft revolution and what setting you have it on, thanks

 

4 cylinder