Re: 1973 340 Choke Thermostat
[Re: 440newport]
#966093
04/06/11 06:12 PM
04/06/11 06:12 PM
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Joined: Oct 2008
Posts: 765 Shoreline, Washington
72roadrunnergtx
super stock
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super stock
Joined: Oct 2008
Posts: 765
Shoreline, Washington
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Quote:
You can get a modern equivalent that works the same, but they don't look like originals.
I would question referring to any of these variants as a "modern" equivalent. There was a later 70s design (button style),replacements are still in production in the aftermarket world. If you chose to go with the NOS versions of the original design, be sure to get a couple of spares, they didn't last long back then and won't last any longer now. The high current draw of the heating element burns the contacts to the point that current no longer passes through it at all. Careful describing the resistor as a ballast, it's simply a power resistor used originally to give some versions of the controller two levels/stages of power/voltage to the heater. The later button style controller had some versions having the power resistor connected as a by-pass. The contacts were either closed (providing full voltage to the heater) or when open, depending on engine temperature, would provide partial voltage, via the power resistor, throughout the remainder of the run cycle. Reminder, current aftermarket electric chokes don't pull anywhere near the amount of current these OEM heaters do and are designed to be connected to ign-run circuits full time. Any currently available aftermarket choke delay/timer controls will not likely handle the current load of the factory type heating elements for very long.
Quote:
Lets say the crossover is blocked off such as with the Edelbrock heads. After the car warms up, do you constantly power the choke thermostat to keep it open? Or will the thermostat burn up?
If your cross-over is blocked, like I found with the Edlebrock heads/six-pack set-up, you may need to run a by-pass design as I have described in the above link. I wouldn't run the full current of that heater though my wiring full time. Heating element is not likely to burn-up, the wiring, bulkhead connectors, ignition switch and it's connections likely will.
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Re: 1973 340 Choke Thermostat
[Re: 72roadrunnergtx]
#966096
04/07/11 12:28 AM
04/07/11 12:28 AM
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Joined: Aug 2007
Posts: 6,098 Valencia, España
NachoRT74
master
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master
Joined: Aug 2007
Posts: 6,098
Valencia, España
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well last time I checked was functional... but it was long time ago... will check soon
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: 1973 340 Choke Thermostat
[Re: NachoRT74]
#966097
04/12/11 11:23 PM
04/12/11 11:23 PM
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Joined: Jan 2003
Posts: 1,547 Puyallup, Wa.
Steve340
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,547
Puyallup, Wa.
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This is the 340 one. Part # 4027793.
Last edited by Steve340; 04/12/11 11:25 PM.
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