123 ignition and tach question, How do I set up tach to work with 123 ignition Options

[pete-stevers]

I have a 123 ignition on my 2.4 six motor but I am not sure how to set up my tach to work with the ignition.. can I use a 914 tach? What else do I need?

[VaccaRabite]

I have a 123 ignition on my 2.4 six motor but I am not sure how to set up my tach to work with the ignition.. can I use a 914 tach? What else do I need?

Black/Purple stripe wire to coil negative.

Unsure what the wire colors are for the /6. So it may not be the tach wire that is on the /4.

But for a tach you just have a wire to the coil negative. Dizzy does not enter the chat.
Zach

[pete-stevers]

Does the 123 dizzy have enough current to power the 914 tach
or will I need a six tach.. I hope not
the motor is a 2.4 t 1973.5
the tach is a stock 914 4 1974

[VaccaRabite]

Does the 123 dizzy have enough current to power the 914 tach
or will I need a six tach.. I hope not
the motor is a 2.4 t 1973.5
the tach is a stock 914 4 1974

The Dizzy does not power the tach. The coil does.
The tach reads the pulses from the coil divided by the number of engine cylinders and determines the speed of the engine.

Where it matters is that the tach needs to be able to interpret the pulses from the coil to get to the right RPM. I don't know that a /4 tach can do that for a /6 engine. Usually there is a switch on the back of the tach to determine if the engine is 4/6/8 cylinders. On a stock tach, I bet you have to change it for a /6 or go aftermarket. But I could be wrong if there is a switch on the back that I have just never looked for.

But, again, the dizzy is not in the chat for this. Its all the coil.

Zach