I've got a Pertronix Ignitor III w/Flamethrower III coil on my 289. The engine is back in the car post-rebuild. From reading, it looks like I will not require the ballast resistor with the "III" system. And the wiring is simple--from coil to distro is just plus-to-plus and neg-to-neg. Assuming that is good, any recommendations on how the stock tach is wired into this? Thanks.
Tachometer wiring with Pertronix Ignitor III
- Thread starter KLtiger
- Start date
Austin Healer
Gold forum user
- Messages
- 1,576
my experience is that you will have to send the tach off to be modified to work... Or you can buy one of the new tachs from sunbeamcarparts in the UK. These have a set of switches that allow the tach to be configured for several different ignition set-ups. They are identical in appearance to the original units and I was pleased with one I ordered.
While not an automotive electrician, looking at the wiring diagram for Mark1, 1a, It appears power to tach goes through the ballast resister, then to coil and gets signal through distributor points.. Would it work to run tach power through now unused ballast resister then to coil as before? Just a thought, and don't know if anyone would be willing to take a chance on messing up a tach. Happy to be corrected on this thought.