Moparts Tech Archive

Fuel System

Six Pack Carbs

Demon440
Moparts Member
Posts: 2381
From: Fair Oaks, Calif.
Registered: Feb 2000
posted 12-31-2002 09:11 PM

Ben at ProMaxCarbs is almost done with my 6BBL carbs, so I'm trying to figure my plan of attack. The car isnt a real 6BBL car so "correctness" isnt too much of a concern for me. Ben has restored them with the choke intact, but I really wont need it in my neck of the woods and for fair weather driving. My biggest concern isnt the choke plate on the carb, but rather the heat exchanger in the intake. I would like to block it off. It is an original aluminum intake, and had large cracks underneath from the exhaust heat. I had them welded up, but dont want that to happen again. Are you guys running a choke? Did you block off your heat tube? Thanks in advance!

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GTXtasy
Moparts Member
Posts: 935
From: Milmont Park, PA USA
Registered: Oct 2002
posted 12-31-2002 09:16 PM

Not me, I also blocked off the heat crossover as it's not run too much in the winter.

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xs29j8
Moparts Member
Posts: 270
From: Fort Worth, Texas
Registered: May 2002
posted 12-31-2002 09:50 PM

Since "correctness" is not an issue for you, you could also block the heat crossover and run a manual cable choke.
I run a regular choke setup on my 'Cuda, but an upcoming car will have a manual choke.

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aarlucas
Moparts Member
Posts: 194
From: Northern Virginia, USA
Registered: Jan 2002
posted 12-31-2002 11:11 PM

I used to use the choke on mine. I changed out the iron heads for the eddy heads. They don't have heat so I disabled the choke. Just a little rough on the idle until it warms up a little then it's fine.

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Demon440
Moparts Member
Posts: 2381
From: Fair Oaks, Calif.
Registered: Feb 2000
posted 01-01-2003 12:11 AM

xs29j8, how do you intend to hook up the manual choke cable? Its a good idea, but looks like it could be difficult to do.

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therocks
Moparts Member
Posts: 1697
From: niles Oh. usa
Registered: Nov 1999
posted 01-01-2003 12:54 AM

no 6 pack but a Dominator.Needless to say no choke.A little hard to idle cold but its a 4 speed.Rocky

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xs29j8
Moparts Member
Posts: 270
From: Fort Worth, Texas
Registered: May 2002
posted 01-01-2003 01:10 AM

Demon440 - I have not worked out the details yet, but planned to fabricate a bracket (to hold the cable end) that attached to the front two screws of the secondary pod on the rear carb.
Because I want the manual choke to operate normally (pull out to activate,push in to deactivate), I planned to drill a small hole in the choke bellcrank above the curved slot where the choke pull-off link attaches. If you attached at the same location where the thermostatic choke link does, the choke would operate "backwards".

I had considered other ways such as a separate bellcrank to change the direction of the operation (like a shaker setup does) or even looping the cable to come in from the front and attaching the bracket to the choke pull-off mounting holes.

I hope I have not completely confused you with my description. If you want, I can sketch up the idea and send it to you when I get a chance.

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fastmark
Moparts Member
Posts: 861
From: abilene, TX, USA
Registered: Nov 1999
posted 01-01-2003 01:50 AM

I have the heat cross over blocked and have the chock set very loose. I like the fast idle feature on the choke. Mine starts better and warms up easier with the choke intake.Mine is a 340.

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440beeper
New Member
Posts: 80
From: MA
Registered: Mar 2002
posted 01-01-2003 09:01 AM

I wasn't going to block the intake manifold's heat passage because I had planned on using a stock choke on my 6BBL setup. This post has me questioning my decision though. I also have an original 6BBL aluminum intake... are these intakes prone to cracks when the passage isn't blocked? Should I block it just to be safe?

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Demon440
Moparts Member
Posts: 2381
From: Fair Oaks, Calif.
Registered: Feb 2000
posted 01-01-2003 12:11 PM

440beeper, I'm not sure if its common or not. I asked the guy doing my carbs about it, and he said he has never seen it before. Mine was cracked pretty good. The crack started at the drivers side crossover inlet, then Y'ed off to wrap around the plenum on either side. The local welding shop heli-arced it for me. Its not pretty, but since its underneath, it isnt seen when installed.

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HEMIRR68
Moparts Member
Posts: 375
From: North salem,NY USA
Registered: Apr 2001
posted 01-01-2003 01:28 PM

Its easier to use the choke assembly, i own 3 six pack cars and even though you might live in warm climate, it is good to atleast start the car up using the choke and idle for a minute then kickoff choke. thats what i would do it is easy and will save you hassles

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