Tach issue

[Encswsm]

I have a 66 Charger. A previous owner swapped out a 1973 360 for the stock big block 318. Does anyone know what I can do to get the factory tach to work with the 360?
thanks

 

[pnora]

No difference between motors. The tach most likely did not work on the other motor. FYI 318 is a small block just like the 360

 

[Billccm]

Assume electronic ignition of some type. If so start with rt-eng.com real time engineering.

The original tach movement may need cleaning and lube, etc, too.

I have some videos on tach troubleshooting I can send links if interested.

 

[Sinitro]

If U have an electronic ignition, the OE tach will not be calibrated. It may read but will not be accurate.
For those issues we recommend U contact redlineguageworks.com
Talk with Shannon, located in SoCal but he is the best in the biz for updating OE guages....

Just my $0.02...

 

[Don Frelier]

If U have an electronic ignition, the OE tach will not be calibrated. It may read but will not be accurate.
For those issues we recommend U contact redlineguageworks.com
Talk with Shannon, located in SoCal but he is the best in the biz for updating OE guages....

Just my $0.02...

I put electronic ignition in my Charger in the early 90's.
The tachometer worked fine.

 

[Sinitro]

I put electronic ignition in my Charger in the early 90's.
The tachometer worked fine.

Really...
We have been restoring Mopars for >25 years, and whenever an electronic ignition system was added the OE tach went wacko..
Yes sometimes it would read some engine output but was never accurate..

Just my $0.02...

 

[pnora]

Really...
We have been restoring Mopars for >25 years, and whenever an electronic ignition system was added the OE tach went wacko..
Yes sometimes it would read some engine output but was never accurate..

Just my $0.02...

Negative side of the coil is doing the same thing points or mopar electronic. Any other system like msd or these ready to run its a crap shoot.

 

[Encswsm]

Assume electronic ignition of some type. If so start with rt-eng.com real time engineering.

The original tach movement may need cleaning and lube, etc, too.

I have some videos on tach troubleshooting I can send links if interested.

I would love the link for the troubleshooting videos. Thank you

 

[Billccm]

I would love the link for the troubleshooting videos. Thank you

Links below; each video is short and should give you an idea how the Tach works, how to test your tach movement (you can use a D Cell battery), and the upgraded rt-eng.com module install. If you can't solder, or don't wabt to tackle this yourself rt-eng.com has a service to test and install the module for you. I can also help you if needed.

Restoring Tach for 68 Road Runner – Project BeepBeep

Restoring Tach for 68 Road Runner – Project BeepBeep Part II

Restoring Tach for 68 Road Runner – Project BeepBeep Part III

Restoring Tach for 68 Road Runner – Project BeepBeep Part IV

 

[Don Frelier]

But note that the amplifier for a 66 is slightly different.

 

[Billccm]

This is the instructions for the Tach with 'external' PCB.

https://www.rt-eng.com/images/8/8f/TachBoardManual_REV8.pdf

 

[Billccm]

Professor Ehrenburg article for Tach upgrades:

https://www.rt-eng.com/images/8/8e/RealTimeEngTach_MoparActionApril20005.pdf