Texmark: Re your 600 cfm carb question.. Ted's test mule engine is 50 cu.in. bigger than your stock 272, & had better heads etc. It's very likely that 600cfm is overkill. 57-312s didn't use a carb that big..

Paul

Are you going to run a test with a Lincoln or Merc WCFB on the "A" manifold?. I could supply a newly restored carb for the test all I need is it sent back after the test......JD

56 Vic, B'Ville 200 MPH Club Member, So Cal.

Performance will depend a lot on how it's jetted. But that sounds to me like a lot of carb for a 272 with that manifold. Your setup is not going to approach that 600 cfm of air. Holley makes the 4160 390-cfm, vacuum secondaries carb which would be the first thing I'd look at. Straightforward and affordable. Holley also makes a 450 cfm 4 barrel but I think it's only available with mechanical secondaries, intended more in a multiple carb setup. Demon makes good carbs, they have 525- and 575-cfm versions available with vacuum secondaries, but they're pricey and they may suck down more gas, apples to apples.

For those of us stuck with an "A" manifold, for the time being,does anyone think that it would be advantageous to convert the four hole design to two ovals as has been suggested for the "B" manifold? If yes would you also slot the carb adapter plate?



Mark

Mark

1956 Mercury M100
1955 Ford Fairlane Club Sedan
Delta, British Columbia

By the time you put into reworking the A manifold I would think it cheaper to just by a B manifold and have better performance in stock condition than what the A can do modified because of the better carb selections for the B. From what I see from Teds experience the B kills the A from airflow and that goes a long way in making power.

-Gary Burnette-

Well I've never seen a "B" manifold for sale where I live (Delta B.C.) and the ones one ebay are well north of $200 plus upwards of $50 for shipping. Also I'm just about to get the motor rebuilt so it will be a while before I can justify buying a "B" manifold. I'm retired and I don't charge for my labour so I was just thinking would it help in the short term, to slot the "A" manifold. I can do that for free.

Mark

1956 Mercury M100
1955 Ford Fairlane Club Sedan
Delta, British Columbia

Mark good question about slotting out the '  A ' . Maybe at some point Ted may try ??

Mark, I was running a 600 Holley Vac on my 292, I now have on a Holley 450 Vac [yes vac secondaries] it wasn't a revelation for me, I had the 600 running well, also this is on a 'B' Manifold

Dispite coming down to 58 jets in the 450 over the 64's in the 600 the fuel economy hasn't been that much better..

If you have the 600 try it and see.



"Came too close to dying to stop living now!"

Ted there is a Edelbrock F548 aluminum intake for a teapot carb on ebay that someone is wanting a fortune for and was wondering if you have ever tested one to see if it was any better then the a intake,there is a link in the this and that section for the auction and was wondering if someone bought it for the 1500 buy it now price would be expecting it to rum better the with a stock intake.

Butchering up everything I can get my hands on in Dayton Ohio

Chuck & Jeff.  I do have an Edelbrock #548 aluminum 4V intake sitting here that I plan on running on the dyno mule in the near future.  I didn't have to give much for it probably because it was in sad shape when I got it.  The repairs to the front of the intake have just been completed as that intake was very corroded in the thermostat area when I received it.  In doing a quick visual comparison, the Edel #548 intake ports are much smaller than those on the 1956 ECZ-A manifold.  This is likely attributed to the Edelbrock intake being specifically designed for the 1954 Ford 239 & Merc 256 engines.

 

Here’s a picture of the Edelbrock intake I have after repairing the thermostat housing area.

 

Lorena, Texas (South of Waco)

Mark.  While I’m not going to test that particular scenario on an ‘A’ manifold, it does help the ECZ-B manifold to convert the four holes to two slots.  With that in mind, then I’ll go out on a limb and say that slotting the ECZ-A manifold and also slotting the adapter will help the overall air flow.  And as you mention, labor is cheap when you do it yourself for yourself.  Go for it.

Lorena, Texas (South of Waco)