Electric choke for the factory Q-jet? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Sport/Truck · 02-08-2007, 12:16 PM

I’m looking at getting an air gap intake which doesn’t have the divorced choke.
Is there anything I can do short of getting a new carb? Electric choke maybe?
s/t

RACINJASON22 · 02-08-2007, 01:07 PM

TRY here, Not sure if this is what your looking for. if not an electric or manual choke should fix you up. I love the Air gap too.

http://www.carburetion.com/quadrajet.asp

Sport/Truck · 02-08-2007, 01:29 PM

That’s cool; I’ll give them a call. I also might need some jetting too.
s/t

Sport/Truck · 02-08-2007, 02:23 PM

That eclectric choke mounts in the same spot the orginal one does. I'm going to need something that mounts to the carb.

68C15 · 02-08-2007, 02:36 PM

do you really need a choke in your area?

look at a Qjet from the mid to late 70s and rob the whole assembly from it.

Sport/Truck · 02-08-2007, 02:56 PM

Quote:

Originally Posted by 68C15

do you really need a choke in your area?

look at a Qjet from the mid to late 70s and rob the whole assembly from it.

will this work? Sounds good.

MR MAGOO · 02-08-2007, 03:26 PM

what is the solenoid looking thing-a-ma-jig that the throttle rest on on the right side of a quad? what does the wire hook to? to me it looks like something to idle the motor up with while the a/c is running?

cooters · 02-08-2007, 04:19 PM

the early qjets cannot have elecric chokes put on but the mid 70s qjets just need the electric chock installed in the bimetalic housing on the carb

Longhorn Man · 02-08-2007, 04:59 PM

I don't know jack about quadrajets... however, I DO know that they caddy big blocks had electric chokes on them.

Sport/Truck · 02-08-2007, 09:27 PM

Quote:

Originally Posted by Longhorn Man

I don't know jack about quadrajets... however, I DO know that they caddy big blocks had electric chokes on them.

What year should I get a carb from? Is the caddy carb ok to run? In my thinking the newest carb will be the better choice, right? Any years or cars to stay away from when going to you pull it? What size should I be looking for?

Dean

neonlarry · 02-08-2007, 10:08 PM

This is what your looking for

cooters · 02-09-2007, 12:02 AM

tha caddy qjets and olds have the fuel line straight out the front instead of the side. Pick a late 70s q jet, i believe the US qjets went to electronic metering around 81, in Canada ours did not change till 86

stllookn · 02-09-2007, 04:58 AM

Most Qjets from 1975 on had the choke mounted on the carb. I have a 1976 454 with the divorced choke however. The model 4MC (carb mounted thermostatic choke) and 4ME (carb mounted electric choke) are the models you are looking for. The 4MV is the divorced choke model.

**special-K** · 02-09-2007, 06:38 AM

Well,since these trucks started coming with automatic choke in 69 or 70,Any original carb from that year or newer.Your carb must have been swapped.

68C15 · 02-09-2007, 08:28 AM

Quote:

Originally Posted by neonlarry

This is what your looking for

EXACTLY!!!!!!
look for a 75ish (pre- aneroid) from a light truck or large car. stay with one from a small block, biger engine carbs have a richer fuel curve which is very difficult to make work correctly for your truck.

what i am running is a stock one from a 79 G20 van (engine donor) that I re-calibrated to 72 truck SBC specs. I drilled out the air bleeds and swapped all 4 jets and rods. with mine you can change the lean limit while the engine is running for fine tuning. the older ones you have to remove the carb because the screw is behind a plug on the front of the base plate making access almost impossible.

Sport/Truck · 02-09-2007, 09:14 AM

Quote:

Originally Posted by special-K

Well,since these trucks started coming with automatic choke in 69 or 70,Any original carb from that year or newer.Your carb must have been swapped.

I thought my choke is considered automatic? It’s just a divorced choke that's non-electric.
s/t

cooters · 02-09-2007, 09:37 AM

I have not seen qjets with a choke on the carb until the mid 70s. The early qjets had a few holes for a vent right on top of the carb above the fuel filter housing, you need a carb with the choke housing on the carb.

Sport/Truck · 02-09-2007, 12:03 PM

So what gets hooked the electric choke? 12v on a keyed source or thermal sensor?

neonlarry · 02-09-2007, 05:31 PM

12V keyed, also take a picture of your carbs linkage with you when you go looking. That carb is off a mid 70's Caddy (795CFM, side fuel inlet) the base plate will need to be changed to one with the right linkage setup or dissembled and put in a throttle shaft with the proper linkage.

02-08-2007, 12:16 PM	#1
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Electric choke for the factory Q-jet? I’m looking at getting an air gap intake which doesn’t have the divorced choke. Is there anything I can do short of getting a new carb? Electric choke maybe? s/t __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

02-08-2007, 01:07 PM	#2
RACINJASON22 GEARHEAD Join Date: Jan 2007 Location: CENTRAL,PA Posts: 2,284	Re: Electric choke for the factory Q-jet? TRY here, Not sure if this is what your looking for. if not an electric or manual choke should fix you up. I love the Air gap too. http://www.carburetion.com/quadrajet.asp __________________ 72 SWB 2WD MY PROJECT 72 LWB 4X4 FUTURE PROJECT SUBSCRIBE HEREBOARD VENDORS HERE NORWOOD MEET SURVIVOR!

02-08-2007, 01:29 PM	#3
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Re: Electric choke for the factory Q-jet? That’s cool; I’ll give them a call. I also might need some jetting too. s/t __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

02-08-2007, 02:23 PM	#4
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Re: Electric choke for the factory Q-jet? That eclectric choke mounts in the same spot the orginal one does. I'm going to need something that mounts to the carb. __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

02-08-2007, 02:36 PM	#5
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	Re: Electric choke for the factory Q-jet? do you really need a choke in your area? look at a Qjet from the mid to late 70s and rob the whole assembly from it.

02-08-2007, 03:26 PM	#7
MR MAGOO Registered User Join Date: Jan 2007 Location: minden la Posts: 80	Re: Electric choke for the factory Q-jet? what is the solenoid looking thing-a-ma-jig that the throttle rest on on the right side of a quad? what does the wire hook to? to me it looks like something to idle the motor up with while the a/c is running? __________________ 1972 C-10 SWB 350CI TURBO 350 TRANNY, TILT, POWER WINDOW & BRAKES, TANK UNDER THE BED W/MARKER LIGHT FILLER. 3.08 GEARS, CLASSIC AIR :hit2: :hit2: 4 WHEEL DISK BRAKES 2000 chevy blazer 1990 nissan pick-up 1984 mazda pick-up (son's project truck)

02-08-2007, 04:19 PM	#8
cooters Senior Member Join Date: Oct 2006 Location: Edmonton Alberta Posts: 458	Re: Electric choke for the factory Q-jet? the early qjets cannot have elecric chokes put on but the mid 70s qjets just need the electric chock installed in the bimetalic housing on the carb

02-08-2007, 04:59 PM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Electric choke for the factory Q-jet? I don't know jack about quadrajets... however, I DO know that they caddy big blocks had electric chokes on them.

02-08-2007, 10:08 PM	#11
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,746	Re: Electric choke for the factory Q-jet? This is what your looking for Attached Images __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

02-09-2007, 12:02 AM	#12
cooters Senior Member Join Date: Oct 2006 Location: Edmonton Alberta Posts: 458	Re: Electric choke for the factory Q-jet? tha caddy qjets and olds have the fuel line straight out the front instead of the side. Pick a late 70s q jet, i believe the US qjets went to electronic metering around 81, in Canada ours did not change till 86

02-09-2007, 04:58 AM	#13
stllookn Saving 1 truck at a time! Join Date: Aug 2001 Location: Kent, WA Posts: 6,465	Re: Electric choke for the factory Q-jet? Most Qjets from 1975 on had the choke mounted on the carb. I have a 1976 454 with the divorced choke however. The model 4MC (carb mounted thermostatic choke) and 4ME (carb mounted electric choke) are the models you are looking for. The 4MV is the divorced choke model. __________________ '68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary)

02-09-2007, 06:38 AM	#14
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,861	Re: Electric choke for the factory Q-jet? Well,since these trucks started coming with automatic choke in 69 or 70,Any original carb from that year or newer.Your carb must have been swapped. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

02-09-2007, 09:37 AM	#17
cooters Senior Member Join Date: Oct 2006 Location: Edmonton Alberta Posts: 458	Re: Electric choke for the factory Q-jet? I have not seen qjets with a choke on the carb until the mid 70s. The early qjets had a few holes for a vent right on top of the carb above the fuel filter housing, you need a carb with the choke housing on the carb.

02-09-2007, 12:03 PM	#18
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Re: Electric choke for the factory Q-jet? So what gets hooked the electric choke? 12v on a keyed source or thermal sensor? __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

02-09-2007, 05:31 PM	#19
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,746	Re: Electric choke for the factory Q-jet? 12V keyed, also take a picture of your carbs linkage with you when you go looking. That carb is off a mid 70's Caddy (795CFM, side fuel inlet) the base plate will need to be changed to one with the right linkage setup or dissembled and put in a throttle shaft with the proper linkage. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI



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