Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old Yesterday, 09:43 AM   #1
rvye@roadrunner.com
Junior Member
 
rvye@roadrunner.com's Avatar
 
Join Date: Dec 2021
Location: Auburn Maine
Posts: 5
Default Model B manifold

Will a model b intake manifold work with a model a exhaust manifold that has a heater
rvye@roadrunner.com is offline   Reply With Quote
Old Yesterday, 10:28 AM   #2
rotorwrench
Senior Member
 
rotorwrench's Avatar
 
Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 13,547
Default Re: Model B manifold

The model B exhaust manifold was changed for an exhaust flow out at a near 45 degree angle back from the straight down out flow of the model A. If you use an accessory heater manifold for a model A on a B vehicle then the exhaust pipe would have to be modified to work. The frames of model B cars are a good bit different from the model A and may make this a challenge. If the model B engine is used in a model A car then the A manifold would be the best fit. Keep in mind that all these manifolds are old and have a tendency to droop at the outlet over time. The newer the exhaust manifold the better.

The intake manifold for the model A is a 1-inch bore while the B is 1 1/8". B manifolds aren't as plentiful as the A type. They both have a tendency to crack around the carburetor mount flange. An A manifold can be matched to a B carburetor by boring the passage or tapering it to match. The model A manifolds are available new so they may be a better choice to modify. The B manifold should work but the upper portion of the casting is a bit different than the model A and has a squared off appearance in the center T junction with the runners to the engine block. I guess it depends on how the heater duct cover for the top of the exhaust manifold is designed. There were several manufacturers of these set ups.

I'm including this link to illustrate many of the different heater designs from the model A era.
http://www.gwcmodela.com/pdfs/meetings/Manifolds.pdf

Last edited by rotorwrench; Yesterday at 11:25 AM.
rotorwrench is online now   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old Yesterday, 08:03 PM   #3
Newc
Senior Member
 
Newc's Avatar
 
Join Date: May 2010
Posts: 1,619
Default Re: Model B manifold

Note; the B eng used in 33/34 vehicles had a Model A type exhaust manifold. Newc
Newc is offline   Reply With Quote
Old Today, 10:11 AM   #4
rotorwrench
Senior Member
 
rotorwrench's Avatar
 
Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 13,547
Default Re: Model B manifold

Sponsored Links (Register now to hide all advertisements)
The Model 40/46 cars manifold was basically the same as the model A type but it had the 46-9430 casting mark. Model As can be found with this manifold since it was the factory replacement for the model A part and superseded it in service part inventories. The 1932 model B was unique and that makes it rare in the modern era.
rotorwrench is online now   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 06:10 PM.