383/440 2BBL CARB CFM

[FLY 9999]

Do they flow the same or are there other combos that are bigger. Need the highest/ biggest 2 bbl factory appearing. Thanks

 

[turbine68rt]

Never saw a 2bbl on a passenger car 440. The exception may be an industrial application.

 

[Geoff 2]

383 were available with 2 bbl. Never heard of 413-440 having a 2 bbl.
The later 383 & low performance 440s had a 625 cfm Carter AVS. Performance 440s had a 750 cfm AVS. Both excellent carbs.

 

[GTX JOHN]

The CFM is measured on a different inches on a two barrel than a four barrel.
In 1959 you could get a high deck 383 and that manifold would fit on a 413/440
but I do not know why you would care to do so. a 500 or 600 CFM two barrel.
would not flow near as much as a 500 or 600 four barrel.
My guess is about 1/3 less actual flow on a four barrel bench.
Some engineering types could tell you precisely.

 

[Photon440]

The conversion factor is 1.414. Which means that the 1350 cfm. for a six-barrel 440 would flow 954 cfm. if it was measured the same way, as if it was a four barrel.

This page shows various 2bbl Carters that Chrysler used over the years, none of them go over 365 cfm. or, about the same as a 260 cfm 4bbl. The 383 and 400 engines used the 365 version. Also, the 1971 360 used a 350 cfm Holley.
Carter BBD Specifications - Mikes Carburetor Parts

The famous Holley 4412 had 350, 500 and 600 versions, but they wouldn't look stock, or bolt without an adaptor to your engine. I believe there was a one year Rochester 2CG used on the 1971 318, I don't know the size but they were available up to a 435 cfm., look for a 1.686" throttle plate and 1.375" venturi.

 

[lemondana]

I have 2 440 Industrial irrigation motors that have 2 bbl intakes, although they both ran on propane.

 

[FLY 9999]

This is what I need. Thanks to all.

 

[PROSTOCKTOM]

If you want a larger 2-barrel you can get a custom 750 cfm Holley in that configuration. They are used for 2 barrel only racing classes.

Tom

 

[Photon440]

If you want a larger 2-barrel you can get a custom 750 cfm Holley in that configuration. They are used for 2 barrel only racing classes.

Tom

Custom, yes, but I don't think Holley sells anything that large. They used to have the 600 cfm. 2bbl which would reach 650 with the optional velocity stacks, but you can't get it from them any longer.