Author Topic: Shift light for dumies (Read 3166 times)

retroboy · « **on:** August 07, 2017, 03:31:02 AM »

Howdy
Will one of those adjustable 12 volt led shift lights pick up a pulse from the earth terminal of an old internal coil Vertex mag.
Cheers

Supercat · « **Reply #1 on:** August 07, 2017, 07:24:03 AM »

We use a signal convertor to run a Sun tach and shift lite.
Works great

Spud Miller · « **Reply #2 on:** August 07, 2017, 10:09:59 AM »

Tachs always want a positive DC pulse and mag is an AC animal. The Autometer 9118 or MSD 8132 will convert the AC signal to DC for your tach or shiftlight device. Unfortunately, those devices (they are same thing with a different label) work about half the time for people. They hate RFI and tachs and shift-lights freak out sometimes using those.

If ignition noise gives you problems, you could try getting a Vertex cap opened up for low impedance suppression wires, or try our device. Ours is a bunch more expensive to make but usually works where other devices have failed. Your mileage may vary!

Vertex cap with larger holes:
https://fuelinjectionent.myshopify.com/collections/caps-rotors/products/vertex-8-cyl-cap-opened-for-suppression-wire

Set of suppression wires for a Vertex:
https://fuelinjectionent.myshopify.com/collections/plug-wires/products/solid-core-90-degree-for-vertex-black-or-red

Our tach device:
https://fuelinjectionent.myshopify.com/collections/rpm-timing-related/products/tach-pulse-generator

Spud