+12V for Electric Choke?
I'm installing an Edelbrock Performer 1406 Carburetor with an electric choke and I'm looking for the best location to connect the positive lead to the choke. The instructions say to attach it to any +12V ignition controlled connection, but not the coil. Can I connect it to the coil stud of the starter solenoid, or are there any other ignition controlled connections in the engine bay?
I wired mine in to the switched power of the windshield wipers. It was easy for my car since on the 69's the wipers are under the cowl cover so I was able to put a wire into there from my engine bay that connects to the choke.
Some ignition activated wires are going to be resistance leads with less than 12V, like the coil wire. I believe the I terminal is used in an old points type igintion to supply a full 12v to the coil, via a wiring harness splice at the firewall, when the car is cranking. This was done to supply a full 12V to the coil during starting to give the car some more spark. After that the cranking is done, that terminal goes dead and that terminal and the coil get the resisted 9or so volts from the resistance wire. If you have converted over to MSD, the resistance wire is probably gone, so you can grab the switched voltage source going to the MSD box. I know there are some full 12v switched voltage lead under the hood, but I cannot tell you the color code off the top of my head. Isn't the green and black wire at the voltage regulator a switched source (A post)? That post also has the connection to the dummy light when the voltage drops.
Guy's the start terminal on the solenoid is only 12 V with the solenoid engerized and then reduces to the resistor voltage when off so it's not really a good spot for the choke 12V source. A really good place avalable in the engine compt. is the green-red wire (S term) on the Vregulator that is switched 12V with the ign switch (66 and up). Else run a wire directly to the ign switch, use at least 16 g wire.
jaysus ... you lads have ideas ... :-)
basically yah you want 12V+ when the engine is running.
So for this an easy and valid option is to pull 12V from anywhere that is hot when you have ignition on.
Most cars have 7.5V at coil+ if stock so it;s not an option.
What is recommended though is to run it off the STA port of the alternator.
There you will have 12V+ _only_ when the engine is running.
Holley recommends to do so in their manuals and I would be surprised if Edelbrock sees that different.
Kalli
basically yah you want 12V+ when the engine is running.
So for this an easy and valid option is to pull 12V from anywhere that is hot when you have ignition on.
Most cars have 7.5V at coil+ if stock so it;s not an option.
What is recommended though is to run it off the STA port of the alternator.
There you will have 12V+ _only_ when the engine is running.
Holley recommends to do so in their manuals and I would be surprised if Edelbrock sees that different.
Kalli


