Tach

[Jeff S]

I have a 2023 SPF gt40 new build. Engine is a 351w with Holley 8 stack EFI. Ignition is a Pertronix. The tach does not work . If I connect a 30 year old tach I have on the shelf to the smiths tach wiring connector it works , but the factory one does not. Does anyone know what the 8 switches on the back of the smiths tach should be set at? There are 8 switches with either on or off. I assume it needs to be set for the Pertronix ignition?

 

[Bob Putnam]

This might have what you need.

https://www.smiths-instruments.co.uk/app/uploads/2023/05/pil055-iss2-279.pdf

 

[Jeff S]

Thanks Bob. I will look at this later today