07-31-2020, 08:03 AM | #1 |
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Model B motor
an a model B Motor be installed in a Model A easily?
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07-31-2020, 09:36 AM | #2 |
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Re: Model B motor
Yes
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Bob Bidonde |
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07-31-2020, 09:42 AM | #3 |
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Re: Model B motor
My 1929 Fordor has a B motor and transmission in it. Was there when I bought it. The extra 10 horses seems to make a noticable difference.
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07-31-2020, 09:48 AM | #4 |
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Re: Model B motor
Yes, the Model B motor fits into the Model A using the Model A's engine mounts, but it requires a modification to an oil pan to fit the Model A's flywheel housing.
The oil pan choices are to rework a Model A pan by adding 4 dents in its side to clear the Model B connecting rods plus trimming the rear of the Model A pan to fit the larger Model B rear main bearing cap.The alternative is use a Model B oil pan by cutting-off its flywheel housing. If the engine will have a stock or Model A carburetor, the fuel pump is not required, so block-off the pump's opening in the side of the engine. You can use the Model A or Model B distributor. Use a Model A exhaust manifold and intake manifold. The carburetor can be a Model A or Model B. Starting motors are the same, and you can use either the A or B generator. Optionally, you can use a Model A cylinder head and water pump. Use the Model B radiator hoses because they are a tad longer than those in the Model A.
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Bob Bidonde Last edited by Bob Bidonde; 07-31-2020 at 09:57 AM. |
07-31-2020, 09:55 AM | #5 |
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Re: Model B motor
You can also replace the rod nuts with stronger ones and for-go the adding "dents" to the "A" pan, just modify the rear main radius cut.
J
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07-31-2020, 02:40 PM | #6 |
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Re: Model B motor
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07-31-2020, 06:08 PM | #7 |
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Re: Model B motor
Hey ToM,
Bob B has given great advice/info ! I've modified/used both A and B pans on B engines. I like the A pan on the B. Not hard to modify, except for the bumps to clear the B rods. I've always used stronger rod nuts, as recommended by Jim Brierley. They did slightly touch the A pan sides during trial fits ! A bit of work, no matter which path you chose, but worth the efforts. Take your time and ASK if not sure. Good luck |
08-01-2020, 10:48 AM | #8 |
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Re: Model B motor
As John says, you don't need to dimple the A pan if you use ARP 12-point nuts, they are stronger yet smaller in O.D.
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08-01-2020, 05:14 PM | #9 |
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Re: Model B motor
many thanks to all who replied. Tom
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