Choke spring heaters on a six-pack set up

Technical Question and Answer - On topic to 71-74 Plymouth B-bodies only.

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72RoadRunnerGTX
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Choke spring heaters on a six-pack set up

Post by 72RoadRunnerGTX » Tue Jul 22, 2008 12:45 am

Anybody messed with choke spring heaters on a six-pack set up? The Edelbrock heads I used on my project don't have passages for heat crossover to the intake manifold creating a situation of insufficient heat at the choke well (choke never comes off completely). Even with passages through the heads the fact that I'm running headers and not the factory exhaust manifolds with a heat riser flap would create a colder than factory intake. Only way to have a functional automatic choke and have it come off completely is to heat it electrically. The '74 motor, I picked up while back for its block, had a heated divorced choke set up for the Thermoquad(sp). I mated this heater with the holley choke and installed a choke heater timer/control unit from a late '70s Chrysler. The timer/control basically provides the 1.6 amps of current the heater pulls for about 10 minutes on a cold motor and then dropping down to about .5 amps necessary to keep the choke completely open through warm running.

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Update 2/6/2009, since I originally posted this last year I went through two different NOS choke heater controls. Both appeared to have failed due to burned internal contacts. I recall when I worked on these cars back in the day; they didn't last long when the cars were new. I built my own control based on a Bosch relay and a solid state timer circuit. It is holding up much better as of now quite well.
Last edited by 72RoadRunnerGTX on Wed Sep 06, 2017 12:40 pm, edited 4 times in total.

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471Magnum
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Post by 471Magnum » Tue Jul 22, 2008 7:04 am

Cool.

I posted over on Moparts a while back questioning if anyone had ever done an electric choke on a six barrel. Never got much response. I now there are fuel line issues to contend with.

I know the BG six shooter has an electric choke, but by most accounts that set-up is a POS. The fuel feeds from the passenger side for fuel line clearance. Looks like a GM set-up.
-Jim
"I can fix it... my old man is a television repairman... he's got the ULTIMATE set of tools... I can fix it."
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72RoadRunnerGTX
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Joined: Wed Dec 27, 2006 6:44 pm
My Cars: 1972 Road Runner/GTX
1972 Satellite Sebring
1972 Satellite Sebring(big block parts car)
Location: Seattle, Washington

Re: Choke spring heaters on a six-pack set up

Post by 72RoadRunnerGTX » Wed Sep 06, 2017 12:45 pm

Now there’s an old thread, six-pack choke heaters and Pakistani space heaters, what am I missing here?
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sdweatherman
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Re: Choke spring heaters on a six-pack set up

Post by sdweatherman » Sun Sep 10, 2017 9:48 am

I think we need to have an admin remove a new user - he doesn't know the difference between choke spring heaters and space heaters. And if I did need a space heater, I would not by it from Pakistan.
1971 GY8 Plymouth Satellite Sebring Plus
1971 GB7 Plymouth Satellite Sebring Plus w/factory sunroof

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