Points, Condenser, Rotor for Dual Point Distributor - what to buy?

[Bob Gaines]

Have my shop installing Petronix & some other stuff currently ,there telling me the tach likeS  6v but the Petronics likes 12v I though I saw a thread about this ,what's the answer can you keep tach working correctly  & go 12v still thanks

I think the key is to power the pertonix from the ignition switch before the tach.

[68krrrr]

OK thanks Bob I'll let them know that

[shelbydoug]

Have my shop installing Petronix & some other stuff currently ,there telling me the tach likeS  6v but the Petronics likes 12v I though I saw a thread about this ,what's the answer can you keep tach working correctly  & go 12v still thanks

The factory tach is 12v. It reads the current.

With the yellow top coil, the resistance wire that ran from the tach to the coil reduced that to 9v at the + terminal on the coil. You no longer use that with the Petonix.

You need to run a new 14 gauge wire from the tach to the plus terminal on the coil.

The Petronix unit has two wires. One red that goes to the + on the coil. The black goes to the - terminal of the coil.

[68krrrr]

Have my shop installing Petronix & some other stuff currently ,there telling me the tach likeS  6v but the Petronics likes 12v I though I saw a thread about this ,what's the answer can you keep tach working correctly  & go 12v still thanks

The factory tach is 12v. It reads the current.

With the yellow top coil, the resistance wire that ran from the tach to the coil reduced that to 9v at the + terminal on the coil. You no longer use that with the Petonix.

You need to run a new 14 gauge wire from the tach to the plus terminal on the coil.

The Petronix unit has two wires. One red that goes to the + on the coil. The black goes to the - terminal of the coil.

Ok thanks i copied this &  sent it to the tech

[The Going Thing]

OK thanks Bob I'll let them know that

If you want to know how to do it without modification to the harness PM me. I know how to do them without them effecting the tach read.  If not, take your chances. I do all my own work, I don't farm it out to shops other than paint. If you screw it up the tach will not read correctly and will damage it, no matter what anyone else tells you here on the 67-8 cars.