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Posted by Chris Case [75.36.41.183] on Thursday, December 20, 2012 at 15:51:54 :
In Reply to: Wanted: Carter BBD manual choke parts posted by Greg Coffin [4.228.135.194] on Thursday, December 20, 2012 at 11:35:36 :
I think it was a heavy trucks, @ 1971+/-.
You'll also need a fast idle cam with no steps, just a ramp.
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The choke is NOT vacuum operated, it is run by the bi-metallic coil mounted in the manifold. It heats up and opens the choke. The vacuum is the choke pull-off, it opens the choke in accordance to the intake vacuum pressure, preventing over rich situations.
I really jerry rigged my own. I hooked a choke cable to an automatic choke coil. The cable tells the springy coil what I want, the coil then keeps it in mind and sets the choke to an appropriate step in the fast idle steps- when I blip the trhottle. Otherwise, the step hold the choke from moving.
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