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#1
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Electric choke?
I'm looking at buying a carb that has an electric choke on it and I need a way to trigger it. Anyone have a part and number for what you are using to do this?
Thanks!
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69 OHC ZH Sprint Hurst 3 Speed 3:55 (1 of 213) 99 Valkyrie 1520cc Flat 6 108hp/110tq - For Sale http://sohcsix.yuku.com/forums/1/OHC-lounge Wanted: 1969 OHC "H" Camshaft |
#2
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I don't have a carb numbers, but any late 70's Q-jet really, and a few of the early-mid 70's Q-jets with a thermal choke can be converted.
The only thing required once the electric choke is installed is a 12 volt source that comes on with the ignition key. Not 100% related, but I did an electric choke conversion on my Thunderbird's Autolite 4300 carb. It had the heat tube from the exhaust manifold, and it was as simple as popping the outside plate off (with the coil) and installing an electric version, strangely enough I got from a Q-jet, lol. Ran a key'd +12v wire to it and it worked great.
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__________________________________________ "How I learned to stop worrying and love the OHC Pontiac L6" The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 3 & TKO-600 (Drag Week 2011, 2012 & 2015!) 1969 Firebird with a turbo'd Pontiac L6 controlled by a MegaSquirt 3 and backed with a microsquirt controlled 4L60e and 4.56 gears! (Drag Week 2018!) |
#3
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Quote:
__________________
69 OHC ZH Sprint Hurst 3 Speed 3:55 (1 of 213) 99 Valkyrie 1520cc Flat 6 108hp/110tq - For Sale http://sohcsix.yuku.com/forums/1/OHC-lounge Wanted: 1969 OHC "H" Camshaft |
#4
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A late 70's Chevy Q-jet would probably be close and have the electric choke. Smaller the engine the closer the calibration will be. Shouldn't be too hard.
__________________
__________________________________________ "How I learned to stop worrying and love the OHC Pontiac L6" The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 3 & TKO-600 (Drag Week 2011, 2012 & 2015!) 1969 Firebird with a turbo'd Pontiac L6 controlled by a MegaSquirt 3 and backed with a microsquirt controlled 4L60e and 4.56 gears! (Drag Week 2018!) |
#5
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Factory motor and carb for a 69 Firebird Sprint.
__________________
69 OHC ZH Sprint Hurst 3 Speed 3:55 (1 of 213) 99 Valkyrie 1520cc Flat 6 108hp/110tq - For Sale http://sohcsix.yuku.com/forums/1/OHC-lounge Wanted: 1969 OHC "H" Camshaft |
#6
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So you have a front feed Q-jet, so need to look for a late 70's BOP Q-jet instead of a Chevy one. Pontiac had many V8's with Q-jets in the late 70's. You'd want to change the metering rods to something a little fatter to reduce the fueling, but nothing overly complicated.
This is a '79 Trans Am. See the black thing on the side of the q-jet? That one is a heat stove type, but it can be removed and via 3 screws and an electric one (even off a 2bbl) will bolt right on. This is a generic GM electric choke. Easily replaces the heat stove part and just needs a 12v wire ran to it. This one was googled off a 307 engine.
__________________
__________________________________________ "How I learned to stop worrying and love the OHC Pontiac L6" The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 3 & TKO-600 (Drag Week 2011, 2012 & 2015!) 1969 Firebird with a turbo'd Pontiac L6 controlled by a MegaSquirt 3 and backed with a microsquirt controlled 4L60e and 4.56 gears! (Drag Week 2018!) |
#7
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I am looking at a 79 Buick carb that looks like that. Dumb question is if the 12v is hooked up how is it turned on and off? I need for the carb to be easily removed
__________________
69 OHC ZH Sprint Hurst 3 Speed 3:55 (1 of 213) 99 Valkyrie 1520cc Flat 6 108hp/110tq - For Sale http://sohcsix.yuku.com/forums/1/OHC-lounge Wanted: 1969 OHC "H" Camshaft |
#8
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You need a +12v source that comes on when the key is turned on. That's it.
The design is such that the +12v feeds into the spring and heats it up at a semi-calibrated rate, as it heats up it moves and pulls off the choke. Same principle as the exhaust heat ones, just uses electricity to heat it up. When the car is off it cools down, turning the choke back on. I replaced the exhaust thermal tube one on my T-bird because when highway driving in below freezing temperatures it would cool the tube enough to cause the choke to come back on. Didn't have that issue with the electric one. Then like the exhaust one, it's a simple twist clockwise or counterclockwise to have the choke open up more or less when cool. Places like southern California, and probably Texas there, don't need as much choke to start as places up in the mountains or where winter is quite cold.
__________________
__________________________________________ "How I learned to stop worrying and love the OHC Pontiac L6" The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 3 & TKO-600 (Drag Week 2011, 2012 & 2015!) 1969 Firebird with a turbo'd Pontiac L6 controlled by a MegaSquirt 3 and backed with a microsquirt controlled 4L60e and 4.56 gears! (Drag Week 2018!) |
#9
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Quote:
Jon.
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"Good carburetion is fuelish hot air". "The most expensive carburetor is the wrong one given to you by your neighbor". If you truly believe that "one size fits all" try walking a mile in your spouse's shoes! Owner of The Carburetor Shop, LLC (of Missouri). Current caretaker of the remains of Stromberg Caburetor, and custodian of the existing Carter and Kingston carburetor drawings. |
#10
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I believe it. Mine was also missing the commonly used loose cloth heat wrap on the tube. Pulled the electric choke off a GM carb in the junkyard and it fit right on and worked like a champ.
__________________
__________________________________________ "How I learned to stop worrying and love the OHC Pontiac L6" The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 3 & TKO-600 (Drag Week 2011, 2012 & 2015!) 1969 Firebird with a turbo'd Pontiac L6 controlled by a MegaSquirt 3 and backed with a microsquirt controlled 4L60e and 4.56 gears! (Drag Week 2018!) |
#11
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Quote:
__________________
69 OHC ZH Sprint Hurst 3 Speed 3:55 (1 of 213) 99 Valkyrie 1520cc Flat 6 108hp/110tq - For Sale http://sohcsix.yuku.com/forums/1/OHC-lounge Wanted: 1969 OHC "H" Camshaft |
#12
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Ah the venerable bored out 3.8 to 4.1 Buick V6 with the 4-bbl. The only thing I'd watch out for with one is that it's not one of the electric Q-jets (with two electrical plugs on it).
Block all the holes, then fine the one that gives vacuum when the throttle is cracked open and connect that to your distributor. If you have a brake boosters, it's the big port on the carb =P Everything else can be plugged.
__________________
__________________________________________ "How I learned to stop worrying and love the OHC Pontiac L6" The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 3 & TKO-600 (Drag Week 2011, 2012 & 2015!) 1969 Firebird with a turbo'd Pontiac L6 controlled by a MegaSquirt 3 and backed with a microsquirt controlled 4L60e and 4.56 gears! (Drag Week 2018!) |
#13
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Vacuume lines are easy they are either ported or part time vac or full time. You can just plug them all and then with the engine running pull the caps off one at a time and check the vacuume with a gauge full time will always have vac ported will just have vac with throttle movement
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When you really do something right it's like you didn't do anything at all 1931 Pontiac 5 window coupe OHC6 powered 2015 GMC Yukon SLT |
#14
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I'm running an Edelbrock Performer with the electric choke connected to the ignition. Works great, though the downside is you need to fabricate new vacuum and fuel lines.
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