I was thinking roughly 400 cfm per carb?

Another source for adapters to use later large base carburetors instead of Holley 4000s or Carter WCFBs

Charlie Price's Vintage Speed
On-line catalog...
Category - 'Fuel Lines - Blocks - Carb Adapters'
See - page 3; Part No. FL-CA-8
Price - $39.95 ea.

NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

I've been told by several who know more about Carters than me, that Carter did not rate the WCFBs by cfm. That said, based upon throttle bore and venturi size, I've been told that the early WCFBs per the '56 Merc are believed to flow 375 cfm.

The original '56 Holley 4000s were rated by Holley at 350 cfm, as I remember. I have been unable to find that in writing tonight... I've got it in a listing in a late 60's Edelbrock catalog with a purple cover. Still digging...

NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

Bill. The crossram setup actually helped the performance of the ‘hogged out Edelbrock #257 to the tune of 67 additional horsepower. On the flip side of this and using a properly ported Edelbrock FM255 intake, the crossram setup cut the peak numbers back by 26 horsepower. The looks of the crossram adapters on the dual quad intake sure looks impressive though. For a Saturday night cruiser, the looks would outweigh any performance differences as the setup idled and throttled up just fine.

Lorena, Texas (South of Waco)

That’s a serious “OUCH” and a real mess to boot. I pulled apart a 272 that looked similar to that. While I managed to salvage the ‘G’ heads, just about everything within the block itself was pretty much junk.

Lorena, Texas (South of Waco)

That’s the wide spaced (‘56 Mercury?) intake which lends itself nicely to a variety of carb pairs. Adapters which will allow Carter AFB, Edelbrock, Holley 4160’s, or Demon carbs can be purchased from a variety of sources. Here’s the link to the adapter offered by Speedway Motors.

http://www.speedwaymotors.com/Universal-Carb-Adapter-Tapered-Port,69.html

Here’s a picture of a Edelbrock FM255 intake which is very similar to the intake you have with a pair of carb adapters installed.

Lorena, Texas (South of Waco)

Ted, thanks for reply, pretty much what i thought.

  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

Its obvious that the ECZ dual quad manifold that Robi has was made for Ford by Edelbrock. I recently saw an EDB dual quad and then there is the common ECG dual quad, which I would guess was made by Ford. I wonder just how many different 2-4's Ford sold for the Y.I thought that they got away from the 255 Edelbrock/ECZ Ford style due to distributor clearance problems with the 57-later distributors but it appears to work with the MSD distributor. Just wondering out loud, or on line.

http://ford-y-block.com 

20 miles east of San Diego, 20 miles north of Mexico

How can you tell IT's an Edelbrock?

Frank/Rebop

Bristol, In ( by Elkhart) 

Frank, every old Edelbrock 3-2 or 2-4 intake has the 2 semi-circle tooling pads on one side and some sort of flat pad on the other side. The 2 tooling points look like they're meant to hold a fuel log but they're really for machining. The flat pad is on the far side just above the vacuum fitting in the picture. On the manifold in Ted's picture the 2 points have been removed but I'll bet they were once there.



http://ford-y-block.com 

20 miles east of San Diego, 20 miles north of Mexico