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04-11-2021, 08:23 PM | #1 |
Junior Member
Join Date: Sep 2019
Location: Dallas/Fort Worth, TX
Posts: 24
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Flywheel ID
I was told the 8ba I acquired came out of a F-1 pickup. Since the clutch didn’t come with the motor how can I tell if a 10” replacement clutch would fit?
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04-11-2021, 09:07 PM | #2 |
Senior Member
Join Date: Jan 2011
Location: sw minnesota
Posts: 4,543
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Re: Flywheel ID
usually you can see a witness mark where the old disk was, then measure it.
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04-12-2021, 05:56 AM | #3 |
Senior Member
Join Date: May 2010
Location: Cincinnati, OH
Posts: 1,356
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Re: Flywheel ID
Pick a pair of pressure plate bolt holes and measure the distance between them (center to center). If the flywheel was drilled for the 9.5” diameter pressure plate the holes will be exactly 3.00” apart. If it’s been drilled for a 10” pressure plate the holes will be 3.125” apart.
If you’re running a transmission with the big 1-3/8” input shaft, you should not use the 9-1/2” clutch setup as the fingers of the pressure plate are too close together and can hit the front bearing retainer of the transmission (as well as the release bearing carrier hub).
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04-12-2021, 08:10 AM | #4 |
Junior Member
Join Date: Sep 2019
Location: Dallas/Fort Worth, TX
Posts: 24
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Re: Flywheel ID
Thanks Mac this is exactly the information I was looking for. I do believe the witness marks elude to an 11” but I knew there would be a better way to identify.
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04-12-2021, 01:16 PM | #5 |
Member Emeritus
Join Date: Nov 2012
Location: Wichita KS
Posts: 16,132
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Re: Flywheel ID
Not sure what application you have in mind for the engine, but the 11 clutch is not a good option for most. You can always get it redrilled.
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04-12-2021, 01:24 PM | #6 |
Junior Member
Join Date: Sep 2019
Location: Dallas/Fort Worth, TX
Posts: 24
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Re: Flywheel ID
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04-12-2021, 02:20 PM | #7 |
Senior Member
Join Date: May 2010
Location: Oshkosh, Wi
Posts: 4,516
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Re: Flywheel ID
Yes it is 11". Any good machine shop can redrill your flywheel for a 10" clutch
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