Edelbrock #1405 (600 cfm) dual quads question.....

[62maxx]

Can I get some comments about using a progressive linkage V/S a straight linkage set up using these carbs on a stock Chrysler 413 with a slight cam? What's better or worse? Good or bad? Also, who sells the progressive linkage?

Thanks!

 

[dodgeboy440]

Can I get some comments about using a progressive linkage V/S a straight linkage set up using these carbs on a stock Chrysler 413 with a slight cam? What's better or worse? Good or bad? Also, who sells the progressive linkage?

Thanks!

Summit / Jegs / Speedway ….
DIY …..

 

[tonysrt]

I used the progressive linkage on a gen 2 hemi that I just use for the street. I used a 1406 and a 1405 carb and was very happy with it. I don't race, can't afford to break Hemi parts.

 

[Dave6T4]

I used factory progressive linkage on the 2 X 4 setup I had on my 426 Street Wedge. 1962 Chrysler 300H induction system; I think the carbs were 450 cfm. each. It worked fine. The linkage attachment point on the front (secondary) carb is higher than that on the rear (primary) carb. This causes the front carb to open faster, to "catch up" to the rear carb at wide open throttle. The carbs on a 426 Street Hemi operate the same way.
I have heard that the Pontiac guys with 2 X 4 on their 421's prefer to run straight linkage.

 

[khryslerkid]

Edelbrock #7094 linkage

Edelbrock 8091 fuel line

If you haven't replaced your accelerator pumps yet get the orange #1467.

And one of these if you don't have one...
Edelbrock 1481 Edelbrock Throttle Lever Adapters for Performer Carburetors | Summit Racing

 

[dodgeboy440]

I used factory progressive linkage on the 2 X 4 setup I had on my 426 Street Wedge. 1962 Chrysler 300H induction system; I think the carbs were 450 cfm. each. It worked fine. The linkage attachment point on the front (secondary) carb is higher than that on the rear (primary) carb. This causes the front carb to open faster, to "catch up" to the rear carb at wide open throttle. The carbs on a 426 Street Hemi operate the same way.
I have heard that the Pontiac guys with 2 X 4 on their 421's prefer to run straight linkage.

Kinda like the factory did back in the day …

 

[6PKRTSE]

I ran a dual 1407 (750's) on a street Hemi with an Edelbrock progressive linkage. With some tweaking and tuning of the carbs, the car ran awesome for years.

 

[Geoff 2]

Run the progressive linkage.

 

[lewtot184]

I prefer progressive for street use.

 

[matthon]

If you go the direct route you can put it together dirt cheap with good parts.
Dual Quad Inline Linkage - Homemade

 

[AMX364]

Progressive, for street. Had 383 70 Barracuda went to old factory 2x4 intake and ran 2 400cfm Carters with electric chokes on both carbs. That turkey got me my best gas mileage of ANY carb setup that I had tried, also best cold weather start of any B engine that I have seen. For daily driving running on 1 carb the airflow was so much faster and throttle response was so much better.

 

[6PKRTSE]

Progressive linkages do help on the street but not mandatory. One of my current builds, I run two 1050 Dominators on the street and strip with no issues on the street for drivability. With enough tuning anything can be made to work.

 

[lewtot184]

may not be what anyone wants to hear, but i'd sell the iron intake to a collector or restorer and get a ch28. the ch28 is a very good street intake with a nice broad torque band. very easy tune with the edlbrock 600's. maybe the best and least troublesome intake/carb combo i've ever used.

 

[matthon]

My tunnel ram with aluminum heads and 1:1 linkage gives me no issues, when I had carbs on it and now with efi.

Curious, how do those low dual quad intakes distribute fuel to all 8 with progressive linkage, or maybe the question is do they do it well?

I never ran one, I knew a guy who put one on a 318 poly and said it just looks good and eats gas, but then again, 318 poly.
Nothing against 318 polys, I drive one.

 

[lewtot184]

My tunnel ram with aluminum heads and 1:1 linkage gives me no issues, when I had carbs on it and now with efi.

Curious, how do those low dual quad intakes distribute fuel to all 8 with progressive linkage, or maybe the question is do they do it well?

I never ran one, I knew a guy who put one on a 318 poly and said it just looks good and eats gas, but then again, 318 poly.
Nothing against 318 polys, I drive one.

I was concerned about fuel distribution with small primaries, dual plane intake and progressive linkage. Never happened with ch28. All plugs burn equally and clean. Surprised me. The only problem ( if you want to call it one) is the primaries on the back carb won't support interstate speed. When the weather warms up I'm going to try bigger carbs again.

 

[khryslerkid]

Curious, how do those low dual quad intakes distribute fuel to all 8 with progressive linkage, or

---

maybe the question is do they do it well?

The question I have is how did the factory set the carbs up to run progressive. I originally set mine up to run progressive and the front four cylinders ran lean as all get out. Like 200* hotter than they should. Nice thing about the Eldebrock progressive linkage is you can lock it in for one to one. That's the way I'm running it without any problems. It must be the partition in the cast iron manifold.

I was concerned about fuel distribution with small primaries, dual plane intake and progressive linkage. Never happened with ch28. All plugs burn equally and clean. Surprised me. The only problem ( if you want to call it one) is the primaries on the back carb won't support interstate speed. When the weather warms up I'm going to try bigger carbs again.

I had to open up the primaries in the manifold in order to have the Edelbrock throttle plates pass through them.