Relay for ignition.

[chrger1967]

I have a Pertronix II distributor in my 67 Charger with a 383. When I bought the car, to get it running we used a coil from Advance Auto that's for points. I have to upgrade to Pertronix flamethrower coil for this setup. I was looking into using a relay as I cannot use the ballast resistor with this coil. After checking the wiring diagram, it seems J2B goes to the positive of the coil and J3 goes to the ignition switch. I really do not want to cut anything, so I was thinking about using the J3 as the ignition source and not using J2B and just run a lead to the + of the coil from the relay. I figure using a relay would kill two birds with one stone by giving the coil a solid 12 volts and have less of a load on the ignition wiring, what do you guys think?

 

[pnora]

Waste of time. Just make a jumper for the resistor.

 

[R413]

At the resistor the side with blue and brown needs to go to the coil so when key is in crank it will have power. The single blue wire provides power with key in run position. So you need to connect the two together for car to start and run.

 

[Crackedback]

Putting in a relay for the ignition and feeding anything else that is keyed on is a good idea to keep load off that OEM wire and switch.

 

[chrger1967]

Putting in a relay for the ignition and feeding anything else that is keyed on is a good idea to keep load off that OEM wire and switch.

Well, for something like that, I would need another fuse box with relays built in, No? The relay I want to put, would only be for the ignition.

 

[Geoff 2]

The relay is a good idea. If the ign coil is an E core, it will draw more current.
To get the best use of the relay, connect one contact to the battery [+] terminal or alt post with a 10 amp inline fuse. Connect the other relay contact to the module/coil [+]. This will ensure that your ign system gives the maximum output that it is capable of.