Tach Help

[KP]

I have a Sun tach and Autometer tach and can't seem to get either one to work. I am running a 6A MSD box.

 

[Demonracer]

You may need an MSD tach adapter, PM me for more information.

 

[67Dart273]

Go to the MSD site and start by reading the destructions to the box you are using. Tachs with CD/ MSD do NOT work the same nor are they wired the same as with breaker points/ Mopar electronic, / HEI or other "switched coil NEG" type systems

MSD / CDI works more like a photoflash, electronic flash. An inverter charges up a capacitor and the trigger dumps the cap across the coil. The coil NEG is grounded with CD, not switched

 

[billccm]

MSD has a consistent tach signal. It is stable and straightforward and works with most modern tachs. Do not connect your tach to the coil when using MSD.

Restoring Tach for 68 Road Runner - Project BeepBeep - Average Guy's

 

[RustyRatRod]

 

[KP]

You may need an MSD tach adapter, PM me for more information.

I am not sure how to pm on here.
This is my Email address:
No. Email addresses allowed i public forums

 

[Bewy]

Most tachs need the MSD # 8920 adapter, a few need the 8910 with MSD boxes.

 

[Divenut]

Most tachs need the MSD # 8920 adapter with MSD boxes.

This is what I had to do.

 

[KP]

Does anyone on here have a used MSD Tach Adapter?

 

[Demonracer]

Go to my avatar, click on it & then click on "start a conversation".