06-08-2016, 05:22 PM | #1 |
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1940 flywheel
Just pulled the transmission, clutch and flywheel from my 40 Ford and found this. The clutch and pressure plate are 9" but I am wondering if this the correct flywheel for the car. Never saw one with the deep dish like this one. Should I look for a flat flywheel or just have this one resurfaced and use it? I have not driven this car yet as I am still in the process of rebuilding it. Thanks
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06-08-2016, 05:39 PM | #2 |
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Re: 1940 flywheel
That's correct for your 40.
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06-08-2016, 05:47 PM | #3 |
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Re: 1940 flywheel
Some folks trim the lip off to lighten the flywheel and get faster rpm response.
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06-08-2016, 06:28 PM | #4 |
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Re: 1940 flywheel
Ken is correct in that is the authentic flywheel for your '40. Rotor is also correct in that some folks cut that lip off. I am one of them Be certain to have the flywheel balanced prior to reinstallation. Also, be certain the six tapped holes in the flywheel for your pressure plate are deep enough to allow the bolts to do their job.
Depending on how much is ground, and how much slag from grinding the shop leaves in each hole (clean them thoroughly) you may have to either shorten the bolts or, as I do, drill the six holes completely through and run the threads through as well. Why Ford drilled and tapped bottomed holes in this case is well beyond my imagination.
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06-08-2016, 08:28 PM | #5 |
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Re: 1940 flywheel
Only reason I can think of was an attempt to keep someone from installing too long a bolt, similar to the distributer/timing gear problem?
Last edited by JSeery; 06-09-2016 at 07:46 AM. |
06-09-2016, 07:26 AM | #6 |
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Re: 1940 flywheel
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06-09-2016, 09:13 AM | #7 |
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Re: 1940 flywheel
Can a 59A flywheel be used instead of cutting the lip off?
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06-09-2016, 11:00 AM | #8 |
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Re: 1940 flywheel
59 series will bolt right up but would likely have the pattern for the 10-inch clutch instead of the 9-inch.
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06-09-2016, 11:13 AM | #9 |
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Re: 1940 flywheel
I had my flywheel lip trimmed & balanced on my 59ab motor what a difference in power...especially gettin on the freeway!
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06-09-2016, 11:59 AM | #10 |
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Re: 1940 flywheel
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06-09-2016, 12:18 PM | #11 |
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Re: 1940 flywheel
Yes.
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06-09-2016, 12:19 PM | #12 |
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Re: 1940 flywheel
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06-09-2016, 12:21 PM | #13 |
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Re: 1940 flywheel
But, you are saving wieght with the flywheel just to add wieght with a larger pressure plate and clutch! I would trim the original.
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06-09-2016, 12:45 PM | #14 |
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Re: 1940 flywheel
So how much weight difference is there between a 9" clutch and a 10" clutch? For convenience sake, I would go with the 10". The flywheel itself is much lighter than the 40 where the weight is concentrated at the outer edge.
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06-09-2016, 12:56 PM | #15 | |
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Re: 1940 flywheel
Quote:
I have a 59A flywheel and a '40 flywheel. I could just weigh the flywheels and see. Although it may be a while before I can get that done. |
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06-09-2016, 02:29 PM | #16 |
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Re: 1940 flywheel
Wonder what the total weight difference is between 10" and 9" flywheel, clutch disc and pressure plate
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06-09-2016, 03:09 PM | #17 |
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Re: 1940 flywheel
Great question. If I weren't stuck here at work I'd get right on it. When I get time I will weigh a 59A flywheel, clutch and pressure plate. The 40 flywheel I have is still on the engine. Anyone else have one loose to weigh?
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06-09-2016, 05:43 PM | #18 |
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Re: 1940 flywheel
It's not the absolute weight, it is the weight at a distance from the centerline. A 10 inch setup is heavier, but not that much, it is the greater distance from the centerline. A 9 inch is going to be better for performance. If you are not that interested in performance then it is not going to matter. But if your not that interested in performance why be concerned about the flywheel weight in the first place?
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06-09-2016, 06:02 PM | #19 |
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Re: 1940 flywheel
I have a 59 flywheel that has been lightened. It weighs 26 #s. You have to overcome more inertia with a 10" clutch vs a 9".
How much can you so safely lighten a stock 59 flywheel. I have aluminum ones that weigh in at 12#s, , but I feel they are to light for a '40. |
06-09-2016, 06:25 PM | #20 | |
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Re: 1940 flywheel
Quote:
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