View Full Version : MSD 12lt Pro Mag

George C A
08-16-2010, 02:04 PM
We have a front engine dragster with an injected alky SBC running the 12LT mag PN 7908. The Electronic points box and coil assy. is PN 8105 lot number 208717.

We are using a small battery for the trans brake ( 12volt 10ah).

Our engine builder has advised us to use a three step. It would control the burnout rpm using a button on the steering wheel also the launch rpm would be controlled from another button on the other side of the butterfly wheel. Lastly a chip would protect the engine from an over rev.

We would also like to run a shift light. With yet another rpm level.

Can you provide part numbers and a wiring diagram?

Thank you. George

08-16-2010, 04:21 PM
here ya go.



George C A
08-16-2010, 07:01 PM
So I need a two step and a tach adapter?

08-17-2010, 10:30 AM
if you also want to run a shift light , then yes sir ..:thumbup1: