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11
Diagnose a Quadrajet carburetor problem / Re: Floppy Choke Plate
« Last post by Brett Slater on May 22, 2020, 12:38:55 PM »
Looks like you have a 1971-72 bimetal choke unit on intake, this works the same as OEM Buick.
But the choke rod seems to be the short Chevy, Pontiac, Olds style with one bend at middle of rod.
Buick and Cadillac uses a longer choke rod to the blade with two bends that is adjustable at the upper bend.
BTW, you will do fine w/o the secondary pull-off with primary pull-off adjusted as needed.

You nailed it. Good eye!

I tinkered with it today and added the secondary pull off. Also, tweaked that choke rod and realized even after that it was still too short which makes a lot of sense now.

Just ordered the correct one depicted in the bottom picture you previously posted. Thanks again!
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Quadrajet Carb Talk and Tips / E10/15 fuel and vapor lock.
« Last post by old blue 75 on May 22, 2020, 12:25:54 PM »
I read some where lately that the e10/15 fuel will vapor lock in
carburetors when used with a mechanical fuel pump.
Is there any truth to this?
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Quadrajet Carb Talk and Tips / Re: Quadrajet and C6 Ford Trans.
« Last post by Cliff Ruggles on May 22, 2020, 04:06:23 AM »
From memory the Mopar Torqueflights and C-6's used the cable for more than just forced downshifts.

The TH350 hook up point "pulls" the cable, the C6's were "pushed" from what I can remember.

You can used a "fixed" attachment point if you "slot" the arm coming up from the trans so it can slide back and forth on the pin, and spring loaded to keep it up against it so any throttle movement moves it.

Might want to Google up some picks of carbs that operated C-6's to get some ideas on how to fabricate a hook up for them.

I have a 1970 Cobra Jet carb here for the C-6 and it uses a long arm that pivots independently from the throttle arm and adjustment screw for precise control.

When I get a moment I'll try to post a pick of it.....
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Diagnose a Quadrajet carburetor problem / Re: Floppy Choke Plate
« Last post by Kenth on May 22, 2020, 03:29:56 AM »
Without the secondary pull-off, which is a part of "choke delay system", i would set the primary pull-off at .250" to start with.
With cold engine close the choke, seat vacuum break using outside vacuum source, rod in bottom of slot at choke valve shaft, gauge between air horn and lower edge of choke valve.
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Dialing in your rebuilt Quadrajet carburetor / Start up video
« Last post by hiy_po on May 21, 2020, 08:56:00 PM »
Had to strip it down for some turbo repairs. Made a start up video once had it all back to gether. Idles average of 600 to 650 rpm does drop as low as 500 rpm. enjoy.

https://youtu.be/F4uTnM00Yas

I was thinking if I was to use the Pull off would use the same boost ref line the power piston is using. Havent put the pull off back on yet  but may do if I get the hesitation or stumble back as secondary air flaps open. Is hardly noticable atm.
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Diagnose a Quadrajet carburetor problem / Re: Floppy Choke Plate
« Last post by Brett Slater on May 21, 2020, 07:42:07 PM »
Looks like you have a 1971-72 bimetal choke unit on intake, this works the same as OEM Buick.
But the choke rod seems to be the short Chevy, Pontiac, Olds style with one bend at middle of rod.
Buick and Cadillac uses a longer choke rod to the blade with two bends that is adjustable at the upper bend.
BTW, you will do fine w/o the secondary pull-off with primary pull-off adjusted as needed.

How would this novice achieve getting the choke to work properly without the secondary pulloff?
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Diagnose a Quadrajet carburetor problem / Re: Floppy Choke Plate
« Last post by Kenth on May 21, 2020, 12:19:29 PM »
Yes, the bottom one is for Buick.
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Diagnose a Quadrajet carburetor problem / Re: Floppy Choke Plate
« Last post by Brett Slater on May 21, 2020, 10:42:37 AM »
Good to know. Thanks!

Which one of those is for the Buick, the bottom?
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Diagnose a Quadrajet carburetor problem / Re: Floppy Choke Plate
« Last post by Kenth on May 21, 2020, 06:56:00 AM »
Looks like you have a 1971-72 bimetal choke unit on intake, this works the same as OEM Buick.
But the choke rod seems to be the short Chevy, Pontiac, Olds style with one bend at middle of rod.
Buick and Cadillac uses a longer choke rod to the blade with two bends that is adjustable at the upper bend.
BTW, you will do fine w/o the secondary pull-off with primary pull-off adjusted as needed.
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