Moidel B manifold

[johnbuckley]

Is the Model B exhaust manifold the same as an "A"? Even if not identical can an A exhaust manifold and mufffler be used on a "B"?

[darrylkmc]

Originally Posted by johnbuckley

Is the Model B exhaust manifold the same as an "A"? Even if not identical can an A exhaust manifold and mufffler be used on a "B"?

John,

No, the outlet on a 1932 Model B manifold is angled towards the rear and will not align with the Model A muffler

However, in 1933 Ford returned to the Model A style exhaust manifold and will work on a Model A.

Darryl in Fairbanks

[BRENT in 10-uh-C]

Not really. The Model-B manifold has the outlet sweeping back at a 45 (+/-) degree slope whereas the A manifold outlet is more vertical.

Look HERE

[Keith True]

The B manifold does not drop straight down like the A.It goes back at a downward angle.The A manifold bolts right on to the B block.Hundreds,if not thousands of folks have done it.

[johnbuckley]

Originally Posted by darrylkmc

John,

.....

However, in 1933 Ford returned to the Model A style exhaust manifold and will work on a Model A......

Darryl in Fairbanks

So does this mean that the B manifold that was angled to the rear was only current pre-1933. Thus any B after 33 will accept the A manifold. Was there any different in the blocks or ports of pre and post '33 models?

[johnbuckley]

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Originally Posted by Keith True

The B manifold does not drop straight down like the A.It goes back at a downward angle.The A manifold bolts right on to the B block.Hundreds,if not thousands of folks have done it.

Thanks , that seems to answer my question!

[darrylkmc]

John,

Visit Vince Falters Ford Garage and look at the Manifold variations.

http://www.fordgarage.com/pages/exmancompare.htm

Darryl

[hardtimes]

Originally Posted by johnbuckley

Is the Model B exhaust manifold the same as an "A"? Even if not identical can an A exhaust manifold and mufffler be used on a "B"?

Hey john,
Seems that Keith read your question correctly, in that, I believe that you are asking...CAN AN MODEL A MANIFOLD AND MUFFLER BE USED ON A B block .
As Keith stated...thousands, including me have done so !
And, NO they , A/B exhaust manifolds are NOT same for reasons stated.

[johnbuckley]

Thanks Guys, your help is much appreciated as always.

[Terry, NJ]

John, The B manifold is machined out at the Carb. Neck (1.250-1.312). The A manifold is casting finish, 1 3/16. This is not critical but obviously the B manifold will be a little more efficient and give a little more HP than the A.
Terry

[BRENT in 10-uh-C]

Originally Posted by Terry, NJ

John, The B manifold is machined out at the Carb. Neck (1.250-1.312). The A manifold is casting finish, 1 3/16. This is not critical but obviously the B manifold will be a little more efficient and give a little more HP than the A.
Terry

Hi Terry, I believe you are speaking of the intake manifold, ...and the rest of us were commenting on the exhaust manifold.

Where this gets confusing is John asked if the Model-A exhaust manifold & muffler could be used on a Model-B, ...which I think many of us understood that to mean the entire vehicle, since he did not specifically state if could it be used on a Model-B engine.

[Terry, NJ]

Brent, In rereading it, I believe you are correct! My Mistake, I've got to read more carefully in the future.
Terry

[DougVieyra]

Brent - or anyone - is the inside diameter of a '32 B exhaust manifold larger than the stock Model A ?

And am I reading (and understanding) the post (Dayrrl lin Fairbanks - Post # 2) that indicates that a '33 & '34 four-cylinder exhaust manifold is shaped straight downward, like an A , and WILL WORK on a Model A ? (Whereas the '32 is angled, and will not).

This is not what my 1934 4 cyclinder Model C had when installed in the car.

[darrylkmc]

Originally Posted by DougVieyra

Brent - or anyone - is the inside diameter of a '32 B exhaust manifold larger than the stock Model A ?

And am I reading (and understanding) the post (Dayrrl lin Fairbanks - Post # 2) that indicates that a '33 & '34 four-cylinder exhaust manifold is shaped straight downward, like an A , and WILL WORK on a Model A ? (Whereas the '32 is angled, and will not).

This is not what my 1934 4 cyclinder Model C had when installed in the car.

Doug,

According to Vince Falter the 1933-34 Exhaust Manifold 46-9430 is the same as the 1931 A-9430 Manifold. The 1932 B-9430 is the other animal as Brent described.

http://www.fordgarage.com/pages/exmancompare.htm

Darryl in Fairbanks

[Charlie Stephens]

Originally Posted by johnbuckley

Is the Model B exhaust manifold the same as an "A"? Even if not identical can an A exhaust manifold and mufffler be used on a "B"?

John,

Since nobody has asked I will, what type of vehicle (stock or modified) are you working with? The answer to that will determine what manifold you need.

Charlie Stephens

[johnbuckley]

Originally Posted by Charlie Stephens

John,

Since nobody has asked I will, what type of vehicle (stock or modified) are you working with? The answer to that will determine what manifold you need.

Charlie Stephens

Sorry for the confusion- It's a 1930 Model A phaeton , with a model B engine. The exhaust manifold needs replacing - it looks like one for an A engine ( outlet points down) , but I thought the B had the outlet angled towards the rear (as per Vince Falters lower photo). It appears the A and B exhaust manifolds are interchangeable so long as one has the correct muffler system. This car thus presumably has an A manifold on the B engine .

[DougVieyra]

John Buckley - What you have is what all of us have on our Model A's with B engines. It is what makes sense and works as close to the original Ford design as possible. My only thought is: does the alleged '33-'34 'C' engine exhaust manifold (46-9430) have a wider inside diameter than the Model A exhaust manifold?

[Charlie Stephens]

Originally Posted by johnbuckley

Sorry for the confusion- It's a 1930 Model A phaeton , with a model B engine. The exhaust manifold needs replacing - it looks like one for an A engine ( outlet points down) , but I thought the B had the outlet angled towards the rear (as per Vince Falters lower photo). It appears the A and B exhaust manifolds are interchangeable so long as one has the correct muffler system. This car thus presumably has an A manifold on the B engine .

Check carefully before trying to use a Model B exhaust system on a Model A. Henry was cheap (which is good) and if he could have used the Model A system he probably would have. I have a Model B engine in my '31 RDPU with a stock Model A manifold and exhaust system.

Charlie Stephens

[Charlie Stephens]

Another interesting bit of trivia. The sound we associate with the Model A comes mostly (if not entirely) from the muffler. I had someone pull up in front of my house in what appeared to be a nicely restored Model A. It definitely had the right sound. When he lifted the hood it had a 153 inch Chevy II and a Model A muffler. The '32 sounds more like a modern car. As an aside, the last time I found a correct Model B exhaust system was early 1990's. It was an exact reproduction by Mike McKennett. I haven't seen another one since but if I did I would buy it.

Charlie Stephens