Msd Tach Adapter Wiring

1 tach adapter 9117 1 butt connector 3 mounting screws 2 bullet connectors the auto meter tach adapter wires in line on the positive 12 volt supply wire.

Msd tach adapter wiring. Mount the tach adapter in a location away from direct engine heat making sure the wires reach the msd unit and the coil. This adapter should also be used on current triggered tachs hooked in series with the ignition switch. I needed some signal conditioning for the output due to the multi spark nature of the beast at idle. If you are using the magnetic pickup input green and violet wires to trigger your msd ignition you will need the pn 8920 tach adapter.

The pn 8910 will correct the operation of most voltage triggered tachometers or fuel injection systems that do not work directly off the tach output terminal of the msd ignition unit. If the tach still registers incorrectly install this tach adapter. Msd ignition answer november 04 2019. Wiring with a magnetic pickup distributor and a voltage triggered tach.

If you are triggering the msd box using the magnetic pickup wires use tach adapter pn 8920. Msd tach adapter pn 8920 if your tachometer doesnt work correctly after installing an msd ignition control always try to connect the tachs trigger wire directly to the tach output of the ignition. Tach signal wiring explained with or without an msd box foxbody mustang racecar duration. If you are triggering the msd box using the white wire you will need tach adapter pn 8910.

Figure 1 wiring the tach adapter. The tach was reading. If the tach still registers incorrectly install this tach adapter. Msd tach adapter pn 8920 if your tachometer doesnt work correctly after installing an msd ignition control always try to connect the tachs trigger wire directly to the tach output of the ignition.

Never connect any wires to the coil terminals when an msd 6 7 8 or 10 series ignition is installed. If your tach did not work when hooked up to the tach output of the msd box you will need a tach adapter. Splice the white wire from the pn 8910 into the msds white trigger wire. The pn 8920 will correct the operation of most voltage triggered tachometers that do not work directly off the tach output terminal of the msd control.

Creating a tachometer adapter using a schematic i found online as a base. If you are triggering an msd 6 or 7 series ignition with its white wire or points terminal you will need the pn 8910 tach adapter. Msd tach adapter pn 8920 msd wwwmsdperformancecom 915 857 5200 fax 915 857 3344.