Holley 500 CFM 2 Barrel #0-4412S on a Slant 6

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Mopar King said:
I been :pale::puke:very under the weather:pale: lately but getting prepared for summer never the less. this Setup is for my 74 Plymouth Scamp that I am working on Slowly at the moment. It is still a 1 barrel carb but have a 2 BBL Manifold and Kickdown coming soon.

65terrorcuda: I think it has the 904 transmission but unsure and yes I do want the Cable Kick-down set up which Frank said its better. .

How about this part, do I need it as well. http://www.holley.com/20-91.asp







So here is what I learn so far thats needed to make this set up work:

Lokar KD-2904HT Kick down Kit: http://www.summitracing.com/parts/LOK-KD-2904HT/
Lokar TC-1000U Throttle Cable: http://www.summitracing.com/parts/LOK-TC-1000U/
Mr. Gasket 2 barrel Adapter #1937 : http://www.summitracing.com/parts/MRG-1937/
Holley Throttle Lever Extension #20-7 http://www.summitracing.com/parts/HLY-20-7/
Holley 500 CFM 2 Barrel Carb
Click to expand...

If you're going all-cable, you won't need the lever extension. Both cables will match up to the universal throttle lever. You may have to make a spacer to move the lokar bracket a bit away from the carb to prevent the cables from making too extreme an angle on the 2bbl, as the bracket is intended to be mounted to the rear carb bolt of a 4bbl. I used a small square of 1/4" steel with two holes drilled in it. A better solution would be a fancy cable bracket, but I don't see one that will work ideally with the 2bbl...
Like these:
http://www.summitracing.com/parts/LOK-TCB40BG/?rtype=10
http://www.summitracing.com/parts/LOK-TCB-40DQ/?rtype=10
I'm using the "avs" one on an AFB, and it's better than sliced bread.
Hope you are feeling better :sad4:
 

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Bill Dedman said:
That's interesting, and it would seem to tell us that at full throttle, even with what is effectively, a smalller carb (when rated at the parameters that Holley applies to 2bbs vs. 4 bbls) it still has sufficient flow to make as much power as the rest of the engine can support. The better torque, at lower rpms, exhibited by the 4-barrel carb, is evidence of better fuel atomization and distribution, even though the carb has superior total flow capability.
Click to expand...

Which is why a Thermoquad is such a great carburetor.
 
BillGrissom said:
Great info 65TerrorCuda and Bill Dedman. I stand corrected. Wondered what the cfm ratings really meant. Sounds squishy. Next question will be what conditions are 1-barrel Holley's tested under, especially since the OP has a Slant Six.

Finally, my Newport has a Holley Pro-jection "2-barrel" rated "670 cfm". Is is that comparable to a 670 cfm 4-barrel carb. It actually requires a 4-barrel manifold, just has 2 injectors in the throttle body.
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I don't know what the pro-jection flows, but the throttle plates are really big. I think the cut off for power on that setup is ~325 horse? But that was the analog system. Been a while
 

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Dont even waste your time with a 2bbl,because you will be going to a 4bbl in no time anyway. From the been there done that file.
 
My latest creation terrorizing the streets as we speek.....8-)
 

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did you at least stick a cushion on top of the transmission?
 
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