So I searched through the archives and was reading some post about the Autometer Tachs. I came across an interesting one that said you have to send the tach in to be calibrated for out 420a's. Now my question, I was checking out optauto.com and I saw that the autometer gauges have "Dial-in-Exactness." Is sending the tachs in for calibration still an issue or has this "dial-in-exactness" resloved any reason to send the tach back to autometer? Thahks for the help.
#218, "RE: Aftermarket Tachometer" In response to Reply # 2
Yeah thats what I was basically wondering. I came across the post where tricked and you were talking about it. I think I'm gonna send mine anyways since its free.
#219, "RE: Aftermarket Tachometer" In response to Reply # 3
okay before you jump the gun you can't wire it to your ignition though like a regular car you have to find a wire off the ECU to get the correct reading. if you wire it to the ignition it will read too low. does any one know the wire off the ECU? i got mine calibrated for free so i wired it to the ingnition but this was after i found out you could wire it to the ECU.