Can anyone post a couple of pictures and/or some accurate measurements of a false cam that is used to set a K.R. Wilson Line Boring Frame??
TIA
Measurements for a False Cam
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BRENT in 10-uh-C
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Les Schubert
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Re: Measurements for a False Cam
Hopefully I can help you.
The “perfect “ distance from the center line of the camshaft to the center line of the crankshaft is 3.937” (based on my experience). Others may differ by a few thousandth of a inch, but will be close to this. This dimension will give you perfect gear mesh. So I have a “link” that I use to set the line boring bar in place. Because the T blocks have a considerable variation in the vertical location of the camshaft, using this method will cause the crank to have considerable variation in the horizontal location of the crank. This variation has never caused me any problems and has always given me nice running gears. I can send you some pictures tomorrow
The “perfect “ distance from the center line of the camshaft to the center line of the crankshaft is 3.937” (based on my experience). Others may differ by a few thousandth of a inch, but will be close to this. This dimension will give you perfect gear mesh. So I have a “link” that I use to set the line boring bar in place. Because the T blocks have a considerable variation in the vertical location of the camshaft, using this method will cause the crank to have considerable variation in the horizontal location of the crank. This variation has never caused me any problems and has always given me nice running gears. I can send you some pictures tomorrow
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dobro1956
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Re: Measurements for a False Cam
There are two listed on e-bay. They are both by the same seller or he has a double listing.
https://www.ebay.com/itm/K-R-KR-Wilson- ... ctupt=true
I have a diagram somewhere of the measurements, or I can measure mine tomorrow.
https://www.ebay.com/itm/K-R-KR-Wilson- ... ctupt=true
I have a diagram somewhere of the measurements, or I can measure mine tomorrow.
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dobro1956
- Posts: 1287
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- MTFCA Number: 49575
Re: Measurements for a False Cam
Brent, I found my "somewhere" pretty quick 
My scanner is not working so I just took come pics of the diagram. If you can not read all the measurements or need more info, let me know .. These measurements are of a KR Wilson false cam to use with a KR Wilson boring frame. ... other boring frames may use something different
My scanner is not working so I just took come pics of the diagram. If you can not read all the measurements or need more info, let me know .. These measurements are of a KR Wilson false cam to use with a KR Wilson boring frame. ... other boring frames may use something different- Attachments
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BRENT in 10-uh-C
Topic author - Posts: 242
- Joined: Mon Jan 07, 2019 11:21 am
- First Name: Brent
- Last Name: Terry
- * REQUIRED* Type and Year of Model Ts owned: 1909 Tourabout, 1914 Runabout, 1915 Touring, 1916 Speedster, 1925 Speedster, 1926 Hack
- Location: Eastern Tennessee
- MTFCA Number: 32295
- Board Member Since: 1999
- Contact:
Re: Measurements for a False Cam
Thanks Donnie. Mine is exactly like the one in the eBay auction pictures, and while I have not mic-ed mine, it looks very similar to the one you posted. It just looked like a 'homeshop-built' unit -and not like what I would have pictured the factory unit to look like. I appreciate your efforts in researching this for me. Thanks again!!dobro1956 wrote: ↑Wed Jan 16, 2019 9:11 pmBrent, I found my "somewhere" pretty quick
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dobro1956
- Posts: 1287
- Joined: Sun Jan 06, 2019 10:13 pm
- First Name: Donnie
- Last Name: Brown
- * REQUIRED* Type and Year of Model Ts owned: 1927 Sport Touring, 1919 Speedster, 1914 Speedster, Wards tractor conversion, non starter 1926 Improved Touring
- Location: Hills of Arkansas
- MTFCA Number: 49575
Re: Measurements for a False Cam
Brent, yes they are a simple lathe turned item. The only two critical measurements are the .999 shaft diameter, and the 1.375 diameter of the collar. The .999 is the size of the hole in the rear of the block for the camshaft brass bushing, and the 1.375 is the size of the hole in the block for the front camshaft bearing shell. Those measurements allow for a snug "sliding" fit in the holes. The KR Wilson boring frame is designed with "fingers/tabs" to slide against the .999 measurement and then bolt down to the block pan gasket surface.
have fun and be safe ....
have fun and be safe ....