Electric Choke Source

Discussion in 'Electrical' started by Huskidrive, Jul 8, 2018.

  1. Huskidrive

    Huskidrive Member

    I want to hook up my new carburetor's electric choke. Does anybody have a preferred 12 volt source to hook up to? 1970 Challenger R/T 383
     
  2. 67Mopar

    67Mopar Moderator Staff Member

    They want you to connect it to source that's only hot when the engine is running. That way the coil for the choke isn't sitting there cooking itself with the engine off.
    With the engine running, the external vacuum source draws fresh air into the choke housing, which prevents the heating element in the choke housing from overheating.
     
  3. Huskidrive

    Huskidrive Member

    Thanks, I know how it operates, what i would like to know is there a convenient 12 volt source in the engine compartment, or do I have to run the wire through the firewall to the fuse block. I know you can't use the ignition coil for this purpose.
     
  4. 67Mopar

    67Mopar Moderator Staff Member

    I know most folks simply tap off the ballast resistor. If you do that however, it's a good idea to use an in-line fuse in your feed line to the choke.
    Some folks also tap into the fuse panel, and some guys use a relay setup triggered by the alternator field circuit or other engine run source.
    I feel any 12V source will do, except for those that are still live in ACC position.... to easy to forget there. Other than ACC, if your key is on, chances are you have the engine running.
    Hope that helps...

    Mike
     
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  5. Huskidrive

    Huskidrive Member

    Thanks, that was most helpful! I just want to keep the engine compartment "clean"
     
  6. Huskidrive

    Huskidrive Member

    I found an unused 12 volt wire on the engine harness. It's on only when the key is in the run position. Best of all it was only 4 inches from the choke! I installed a fuse and all is well!
    [​IMG]


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  7. 67Mopar

    67Mopar Moderator Staff Member

    God_JobDrunk
     
  8. Bob Hogan

    Bob Hogan Active Member

    Good Deal .. :)
     
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  9. Bob Hogan

    Bob Hogan Active Member

    I think we might have talked about this before.... But did you block off the heat riser to the intake when you reinstalled the intake manifold? Reason I as is, I noticed that you have a thin gasket between the carb and the intake manifold. If you run into a "Hot Soak" problem of the base of the carb running to hot and boiling the fuel in the float bowls, just add the isolator to help the issue at a later date.
     
  10. Huskidrive

    Huskidrive Member

    Yes, I bought the high performance fel-pro gasket that blocks the exhaust crossover.
     
  11. Bob Hogan

    Bob Hogan Active Member

    Good Deal
     
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