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Old 12-17-2020, 02:35 PM   #1
hotrodman222
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Default Flathead crank pulley questions

I have searched through all the pulley threads and maybe I gave up too soon.
So the issue is I have a 34 ford with a 1949 flathead running a crab style distributor and truck water pumps and it works great. I am building a new engine and I want use the same set up, but I can't find a crankshaft pulley that works. Obviously the guy that I bought the 34 from had a custom pulley made.
Who makes a custom crankshaft pulley? Or is there a Ford pulley that uses that will work? Thanks.
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Old 12-17-2020, 02:40 PM   #2
skidmarks
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Default Re: Flathead crank pulley questions

Truck water pumps with wide belts?

Is the stock 8BA stamped steel pulley too large in diameter to work with the crab cap distributor?
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Old 12-17-2020, 03:13 PM   #3
hotrodman222
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Default Re: Flathead crank pulley questions

Yes it is. The diameter is 5 3/8 or so and I need about 5 inch max.
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Old 12-17-2020, 03:34 PM   #4
Tony, NY
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Default Re: Flathead crank pulley questions

I have a crab on my '51 Merc engine. I dug up a photo from 10-15 yrs ago. I machined the OD of the pulley to clear. It wasn't a stamped pulley.
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Old 12-17-2020, 06:01 PM   #5
hotrodman222
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Default Re: Flathead crank pulley questions

What diameter did you machine it?
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Old 12-17-2020, 07:33 PM   #6
Tony, NY
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Default Re: Flathead crank pulley questions

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Quote:
Originally Posted by hotrodman222 View Post
What diameter did you machine it?
I can't say off hand. From what I remember it was just enough to clear the distributor. I can try to get a measurement tomorrow. I think there was a raised area on the pulley that I machined off.
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Old 12-17-2020, 08:33 PM   #7
hotrodman222
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Default Re: Flathead crank pulley questions

Thanks
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Old 12-18-2020, 02:25 PM   #8
Tony, NY
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Default Re: Flathead crank pulley questions

This is the type of pulley I started with ( crazy price). The front pulley is approx. 5 3/8 inches dia. My machined pulley area is a little larger around 5 1/2". https://www.ebay.com/itm/1949-50-51-...wAAOxyxpxQ7475

Last edited by Tony, NY; 12-18-2020 at 02:31 PM.
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