Mechanical or Electric choke, which one works best? Which one do you prefer and why? - Team Camaro Tech
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post #1 of 14 (permalink) Old Dec 11th, 00, 07:30 PM Thread Starter
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I have a Holley carb and was wondering which choke set up works the best? Mechanical or electric. What are the advantages and disadvantages?

On the electric, I've heard of different way to hook up the power source. Where is the best place to tap the power source?
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post #2 of 14 (permalink) Old Dec 12th, 00, 12:40 AM
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A Electric Choke is the only way to go! I used a key on only power source in my fuse box on my 67!

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post #3 of 14 (permalink) Old Dec 12th, 00, 02:55 AM
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I agree......electric is the only way to go. I also tapped one of the switched power sources at the fuse box in my 67.

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post #4 of 14 (permalink) Old Dec 12th, 00, 03:55 AM
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Go electric. The disadvantage of a mechanical choke is that they can hang up if not lubricated occassionally.

[This message has been edited by sr71bb (edited 12-12-2000).]
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post #5 of 14 (permalink) Old Dec 12th, 00, 04:17 AM
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Have used Holleys with electric chokes on many projects over the years, and they work great! Just make sure you connect the choke to a full 12-volt (key-on) source so the heating coil gets full voltage so it'll choke properly and then open all the way. Don't connect it to the coil (+) terminal, as that's not a 12-volt source. Take a feed from the fuse block so the circuit is protected.

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post #6 of 14 (permalink) Old Dec 12th, 00, 01:07 PM
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OK, So I'm the only one who likes the manual choke? I prefer the manual because once my engine fires, I take the choke off within 15 seconds and keep the revs at 1500 with the gas pedal until it warms up. I run my motor on the rich side and being able to knock off the choke early seems to keep my plugs nicer. When I first set up the motor and left the choke on for a few minutes, I noticed alot of carbon on the plugs.
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post #7 of 14 (permalink) Old Dec 12th, 00, 01:48 PM
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Ratpack, you can adjust electric chokes to come off as soon or as late as you want. Then you don't have to hold your foot on the gas pedal.



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post #8 of 14 (permalink) Old Dec 13th, 00, 02:39 AM
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That's true, but that choke action is creating a richer mixture by not having the choke flap wide open.
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post #9 of 14 (permalink) Old Dec 13th, 00, 02:46 AM
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Whats a choke?? Must be for those places where it gets cold.

Hey Pete, do you have a choke???

LOL

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post #10 of 14 (permalink) Old Dec 13th, 00, 05:15 AM
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Ratpack, Why do you think that the electric choke flap isn't wide open?? They work the same, its just a matter of where the choke gets its heat source from and are fully adjustable as to how much and how fast you want it to open. To each his own as its preference to what someone would like. There is no wrong answer. Personally I like electric as its simple and hassle free and much easier to hook up. However with electric make sure your radio is wired to a lead that is always hot so you don't have to have the key on to listen to it otherwise as your at a party or working on your car with the radio on but the engine off the choke will be open
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post #11 of 14 (permalink) Old Dec 13th, 00, 05:39 AM
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What choke?? I took a bridgeport milling machine to my choke horn on my 700CFM double pump. Electric chokes work great though... Like everyone said, pull the elect. feed from the fuse box...but make sure it is not on the accy circuit, (like what the radio uses)So you don't heat the coil when all you want to do is listen to the stereo (with the key turned back to the accy circuit.
best of luck
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post #12 of 14 (permalink) Old Dec 13th, 00, 10:56 AM
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Is there any reason hooking it to the hot side of the ignition would be a bad idea (including on HEI)? How much current does it draw?

That way you've got juice only when the ignition is on (but not in accessory position), and, in the case of the HEI, the supply is right there near the carb.

Any thoughts?
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post #13 of 14 (permalink) Old Dec 13th, 00, 03:12 PM
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With a conventional coil ignition, you don't want to take the feed for the choke from the coil (+) terminal, as that's not a 12 volt source - that terminal is fed through either a ballast resistor or a resistance wire in the engine harness, which supplies about 5 volts to the coil in the "run" position - it only sees 12 volts when the starter is cranking and the resistance circuit is temporarily bypassed.

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post #14 of 14 (permalink) Old Dec 14th, 00, 04:29 AM
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Any other issues??

The HEI is supplied with 12v continuously, though your point is certainly valid for most points type ignitions. Is the HEI the only common ignition out there that uses 12v continuously?
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