Progressive vs. straight pull on dual Weiand intake

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Concept Cars

Junior Member
Someone please help me understand the benefits of using a progressive carb linkage vs. a straight pull linkage?
I'm installing a vintage Weiand intake with dual Stromberg 97's on a 59AB with a stock cam, standard bore, Edelbrock heads and tube headers.
The Weiand intake manifold design places the carbs directly above the intake ports on the block, does this design require the use of a straight linkage pull on both carbs?
Would a progressive linkage starve the front cylinders until everything is opened up?
Is there any advantage to using a progressive linkage vs. straight pull on this configuration?
Does anyone have experience with this particular intake manifold and are you running straight or progressive linkage?
Any thoughts or suggestions are appreciated.
Thank you, Jeff
 

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Personally, with duals, nothing wrong with straight pull.

Trying to run progressive can lead to a world of hurt.

Mart.
 
You don't normally use a progressive linkage when two carburetors are involved for the exact reason you stated....the secondary carburetor's group of cylinders would be starved with negligible mixture flow. Two carburetors should open simultaneously and equally. Progressive set-ups work well in a 3 x 2-bbl set-up where the center carburetor opens first, with the two end carburetors beginning to open (together) as the throttle is progressively fed to increase the power level. When adjusted properly, all three carbs should end-up wide open simultaneously. DD
 
I have 2 cars running dual carbs, 97s on one and 81s on the other with straight linkage and they run fine. As Dick said, the only setups I have seen with progressive linkage have been with 3 carbs.
 
You can run progressive on a 2 carb slingshot intake but that´s about it on 2-carb intakes.
Question is as always why you want to do something...what is the goal...after that you descide on the aproach.
Progressive is for when you have so much carbs that you loose flow and idle/low don´t work well because of that.
 
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I’m running straight linkage dual 94’s with 2” spacers on a speedway intake. 8ba with EAB heads and tube headers. Runs excellent. Simple to tune.
 

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Although I am of the opinion that some specialized dual carb manifolds can be run with progressive linkage, that is definitely NOT one of them.
 
Dual Flathead intakes are not designed to run with any type of progressive linkage if you try your going to hate the results. However thats not my opinion just a fact as it relates to how the duals work. After tuning dozens of dual combinations the important detail is having both carbs tuned as close to each other as possible its actually easy to do using a vacuum gauge to set the idle mixture screws and unisyn gauge to set the throttle shafts so both carbs are pulling the same amount of air at idle engine speed.
Ronnieroadster
 
Ronnie set up my Almquist dual intake, 2 chrome 97's, straight linkage on a 59AB.


He explained in detail what he did. Runs like gangbusters.
Thanks again Ron.


Paul in CT
 
1931 flamingo said:
Ronnie set up my Almquist dual intake, 2 chrome 97's, straight linkage on a 59AB.


He explained in detail what he did. Runs like gangbusters.
Thanks again Ron.


Paul in CT
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Your welcome Paul a fine example of how the dual intakes were designed to be set up. Just the facts mam just the facts no secrets. ;)

Ronnieroadster
 
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