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Topic author
CudaMan
- Posts: 2531
- Joined: Fri Jan 04, 2019 4:17 pm
- First Name: Mark
- Last Name: Strange
- * REQUIRED* Type and Year of Model Ts owned: 1924 Cut Off Touring (now a pickup)
- Location: Hillsboro, MO
- Board Member Since: 2013
Post
by CudaMan » Mon Aug 12, 2019 10:20 am
Hello, I have a set of Watts clutch disks, but I understand that the Watts clutch uses a special, stiffer than stock spring.
Does anyone know the specs of that special spring? X pounds at an installed height of Y inches? or Z% stiffer than the stock Ford spring?
Thanks

Mark Strange
Hillsboro, MO
1924 Cut-off Touring (now a pickup)
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Mark Gregush
- Posts: 5370
- Joined: Sat Jan 05, 2019 1:57 pm
- First Name: Mark
- Last Name: Gregush
- * REQUIRED* Type and Year of Model Ts owned: 1925 cutdown PU, 1948 F2 Ford flat head 6 pickup 3 speed
- Location: Portland Or
- Board Member Since: 1999
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by Mark Gregush » Mon Aug 12, 2019 10:35 am
I am pretty sure it is 110-115 at 2 inches. I did a little searching and all I could find was it had a higher rate then normal. I think normal rate for Ford is about 90 at 2 inches. The stack height of the disks will be the same as stock, 1-1/8" with large Ford disk on top and bottom.
I know the voices aren't real but damn they have some good ideas!
1925 Cut down pickup
1948 Ford F2 pickup
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R.V.Anderson
- Posts: 680
- Joined: Tue Jan 08, 2019 6:01 pm
- First Name: R.V.
- Last Name: Anderson
- * REQUIRED* Type and Year of Model Ts owned: 1914, 1920, 1923, 1923
- Location: Kennedy, NY
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by R.V.Anderson » Mon Aug 12, 2019 10:38 am
Mark is correct. Chaffin's makes the heavier spring.
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Les Schubert
- Posts: 1357
- Joined: Thu Jan 10, 2019 5:47 pm
- First Name: Les
- Last Name: Schubert
- * REQUIRED* Type and Year of Model Ts owned: 27 roadster 13 touring
- Location: Calgary
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by Les Schubert » Mon Aug 12, 2019 11:00 am
Can you still buy the Watts clutch? I had one in a speedster years ago and really really liked it. I figure it helped “preserve “ the rear axle gears!
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Topic author
CudaMan
- Posts: 2531
- Joined: Fri Jan 04, 2019 4:17 pm
- First Name: Mark
- Last Name: Strange
- * REQUIRED* Type and Year of Model Ts owned: 1924 Cut Off Touring (now a pickup)
- Location: Hillsboro, MO
- Board Member Since: 2013
Post
by CudaMan » Mon Aug 12, 2019 11:38 am
I think R.V. Anderson is tooling up to produce them again. The one I have is an original set I bought on Ebay years ago. I see there is another original set of clutch disks on Ebay right now.
I think I'll order the stiffer spring from Chaffin's today so that I have it ready if/when I install my Watts clutch disks.

Mark Strange
Hillsboro, MO
1924 Cut-off Touring (now a pickup)
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hah
- Posts: 136
- Joined: Sun Jan 06, 2019 1:57 pm
- First Name: john
- Last Name: hardiman
- * REQUIRED* Type and Year of Model Ts owned: 26 coupe
- Location: stoughton, ma
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by hah » Mon Aug 12, 2019 2:25 pm
Is this stiffer spring only limited to watts clutch?
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Chaffins
- Posts: 334
- Joined: Mon Jan 07, 2019 5:44 pm
- First Name: Herbert
- Last Name: Chaffin
- * REQUIRED* Type and Year of Model Ts owned: 1909 touring, 1911 touring, 1913 roadster, 1914 touring
- Location: Corona, California
- MTFCA Life Member: YES
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by Chaffins » Mon Aug 12, 2019 3:37 pm
Our new Clutch Spring has a force of 110-115 lbs at 2 inches. It can be used with any Ford clutch set up. Glen
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R.V.Anderson
- Posts: 680
- Joined: Tue Jan 08, 2019 6:01 pm
- First Name: R.V.
- Last Name: Anderson
- * REQUIRED* Type and Year of Model Ts owned: 1914, 1920, 1923, 1923
- Location: Kennedy, NY
Post
by R.V.Anderson » Mon Aug 12, 2019 6:03 pm
Mark S: I am currently making the Watts style clutch.
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