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04-07-2011, 12:30 AM | #1 |
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Carb adaptor for stock intake manifold? (single 94)
Question, I've heard of guys using the stock intake, flipping it upside down, and using an adaptor to fit a downdraft carb.
A guy here locally said he might have one, but it turned out he didn't. My question is, does anybody know if such an adaptor can be had? If so, where? Thanks!
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04-07-2011, 06:49 AM | #2 |
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Re: Carb adaptor for stock intake manifold? (single 94)
In the '50's, we would cut off the vertical riser on the intake, weld a freeze over the hole, then cut a hole in the top and form our own riser and carb mounting plate for the V/8 carb. We then had to use an electric fuel pump because of the height of the carb mounting.
I welded one with nickel arc and one with a torch using cast iron rod and some kind of flux.
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"THE ASSISTANT GURU OF STUFF" Last edited by BILL WILLIAMSON; 04-07-2011 at 11:59 AM. |
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04-07-2011, 07:24 AM | #3 |
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Re: Carb adaptor for stock intake manifold? (single 94)
Here is a picture of one with a '41 Ford 6 Cylinder Carb. Going to install it one of these days?
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04-07-2011, 07:38 AM | #4 |
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Re: Carb adaptor for stock intake manifold? (single 94)
Great idea! You just put a plate on the bottom and still have a heated manifold. Shucks, why didn't I think of that!
IDEA! bolt on a Zenith carb below the plate and really have a conversation piece!
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"THE ASSISTANT GURU OF STUFF" Last edited by BILL WILLIAMSON; 04-07-2011 at 01:57 PM. |
04-07-2011, 09:36 AM | #5 |
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Re: Carb adaptor for stock intake manifold? (single 94)
I got a technical question. The stock manifold is cast iron, correct? So how can you weld it? I heard cast iron is nearly impossible to weld properly.
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04-07-2011, 10:02 AM | #6 |
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Re: Carb adaptor for stock intake manifold? (single 94)
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-------------- Drive it like you know how to fix it! DMAFC / OILERS CC-MC |
04-07-2011, 10:12 AM | #7 |
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Re: Carb adaptor for stock intake manifold? (single 94)
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04-07-2011, 10:21 AM | #8 |
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Re: Carb adaptor for stock intake manifold? (single 94)
Cast iron brazes easily, but can crack afterwards if not cooled slowly.
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04-07-2011, 10:40 AM | #9 |
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Re: Carb adaptor for stock intake manifold? (single 94)
Another choice for backyard manifolding: The B manifold has a flat on top, which could be adequately refined to a smooth surface with just a file. The flat seems just barely capable of accepting a 1950's 2-bolt carb to 3-bolt V8 carb, or one of the ones that just rotates a 6 cylinder base 90 degrees. Getting a solid seal against the manifold casting might require an additional simple flat plate sandwiched in. With that, you might even manage to mount a 2-bolt carb directly.
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04-07-2011, 12:54 PM | #10 |
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Re: Carb adaptor for stock intake manifold? (single 94)
Thanks for the info and the pics guys. I realize how easy it is to make one, with access to the proper equipment. Unfortunately I don't right now.
Does anybody know if such an adaptor is manufactured in some kind of bolt on application? Thanks again for all your knowledge!
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04-07-2011, 01:02 PM | #11 |
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Re: Carb adaptor for stock intake manifold? (single 94)
What size jets and power valve are you planing to start with ?
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04-07-2011, 01:07 PM | #12 |
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Re: Carb adaptor for stock intake manifold? (single 94)
^
Not sure. I was speaking to another member and he said he was running with 46. I'm open to any advice anyone has on this subject too, I've never done this before. The motor is otherwise stock. My main concern is reliability and making sure it runs well. Any extra "pep" would be a plus. Thanks again!
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04-07-2011, 01:27 PM | #13 | |
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Re: Carb adaptor for stock intake manifold? (single 94)
Quote:
After reading down two posts I notice that your question was succinctly answered. So I'll just post some pics of how I installed a Holley one barrel downdraft on an A with a manifold that I assembled many years ago. The auto choke even worked. Image000.jpg Image001.jpg Last edited by Milton; 04-07-2011 at 01:57 PM. |
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04-07-2011, 01:39 PM | #14 |
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Re: Carb adaptor for stock intake manifold? (single 94)
On "running well and reliability"...do not modify any engine until you have it running well stock! Modifying to fix a problem is simply creating a deeper stack of problems!
Bolt on would be easy with no tech beyond an electric drill with a B manifold; with A, there is no reasonable way without some sort of welding approach. |
04-07-2011, 01:41 PM | #15 |
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Re: Carb adaptor for stock intake manifold? (single 94)
It runs well currently.
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04-08-2011, 03:43 AM | #16 |
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Re: Carb adaptor for stock intake manifold? (single 94)
I have a downdraft inlet manifold for sale. Pictured.
See 'The Swap Meet" section.
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R.H.D. Author of Model 'A' Ford technical manuals. Supplier of good original RHD parts. Last edited by RHD; 04-09-2011 at 10:34 PM. |
04-08-2011, 05:05 AM | #17 |
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Re: Carb adaptor for stock intake manifold? (single 94)
That is what I did when I made one years ago. I bored the manifold to clean it up then made a plug with a O ring on the plug. Then no gas could get down there.
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04-08-2011, 05:08 AM | #18 |
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Re: Carb adaptor for stock intake manifold? (single 94)
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