Aschman, Fahnestock, and the K.R. Wilson valve timing tool?
Forum rules
If you need help logging in, or have question about how something works, use the Support forum located here Support Forum
Complete set of Forum Rules Forum Rules
If you need help logging in, or have question about how something works, use the Support forum located here Support Forum
Complete set of Forum Rules Forum Rules
-
Topic author - Posts: 6496
- Joined: Fri Jan 04, 2019 9:37 pm
- First Name: Steve
- Last Name: Jelf
- * REQUIRED* Type and Year of Model Ts owned: 1923 touring and a few projects
- Location: Parkerfield, Kansas
- MTFCA Number: 16175
- MTFCI Number: 14758
- Board Member Since: 2007
- Contact:
Aschman, Fahnestock, and the K.R. Wilson valve timing tool?
Ted Aschman's article on Murray Fahnestock's valve timing method describes home made tools easily made to substitute for the Wilson tool. It would be used with original pistons or their modern equivalents, and Aschman provides measurements. But how about these modern pistons?
I don't have any originals for comparison, but I assume these are different. I wonder if anyone can give measurements for the Wilson substitutes that will work with them.
I don't have any originals for comparison, but I assume these are different. I wonder if anyone can give measurements for the Wilson substitutes that will work with them.
The inevitable often happens.
1915 Runabout
1923 Touring
1915 Runabout
1923 Touring
-
- Posts: 2402
- 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
- MTFCA Number: 30944
- MTFCI Number: 23667
- Board Member Since: 2013
Re: Aschman, Fahnestock, and the K.R. Wilson valve timing tool?
Do folks still adjust their valves using the piston position method, or has that been replaced by setting a consistent lash for each intake valve and a consistent, but slightly larger lash for each exhaust valve.
Mark Strange
Hillsboro, MO
1924 Cut-off Touring (now a pickup)
Hillsboro, MO
1924 Cut-off Touring (now a pickup)
-
- Posts: 6435
- Joined: Sun Jan 06, 2019 11:18 am
- First Name: Scott
- Last Name: Conger
- * REQUIRED* Type and Year of Model Ts owned: '13, '15, '19, '23
- Location: Clark, WY
- Board Member Since: 2005
Re: Aschman, Fahnestock, and the K.R. Wilson valve timing tool?
It all depends on your cam and luck
You sure wouldn't want to time via piston position with a new or newer cam. I got a modest bit of improvement on an original engine using this method but ended up with a very noisy valve train for my trouble. Others state that it helped not a whit.
You sure wouldn't want to time via piston position with a new or newer cam. I got a modest bit of improvement on an original engine using this method but ended up with a very noisy valve train for my trouble. Others state that it helped not a whit.
Scott Conger
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
-
- Posts: 273
- Joined: Sun Jan 06, 2019 12:18 pm
- First Name: Walter
- Last Name: Higgins
- * REQUIRED* Type and Year of Model Ts owned: 1911 Open Runabout
- Location: Realville, PA
- MTFCA Number: 396
- MTFCA Life Member: YES
- MTFCI Number: 153
Re: Aschman, Fahnestock, and the K.R. Wilson valve timing tool?
I've done it with factory grind cams. I wouldn't bother with a cam of new manufacture where the manufacture dictates it was ground to be set by lash.
As to measurements -- depth mics and indicators don't care what pistons one has.
As to measurements -- depth mics and indicators don't care what pistons one has.
-
- Posts: 273
- Joined: Sun Jan 06, 2019 12:18 pm
- First Name: Walter
- Last Name: Higgins
- * REQUIRED* Type and Year of Model Ts owned: 1911 Open Runabout
- Location: Realville, PA
- MTFCA Number: 396
- MTFCA Life Member: YES
- MTFCI Number: 153
Re: Aschman, Fahnestock, and the K.R. Wilson valve timing tool?
If the lash is a problem it only means your hearing is too good!Scott_Conger wrote: ↑Thu Mar 05, 2020 3:07 pmI got a modest bit of improvement on an original engine using this method but ended up with a very noisy valve train for my trouble.
-
- Posts: 6435
- Joined: Sun Jan 06, 2019 11:18 am
- First Name: Scott
- Last Name: Conger
- * REQUIRED* Type and Year of Model Ts owned: '13, '15, '19, '23
- Location: Clark, WY
- Board Member Since: 2005
Re: Aschman, Fahnestock, and the K.R. Wilson valve timing tool?
well, in low, between valves, triple gear whine and rear end, it sounded like a barber-shop quartet minus the bass. Once in high, it was just a snare drum, but it DID solve the creaking wheels.
Scott Conger
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
-
- Posts: 52
- Joined: Sun Jan 06, 2019 12:30 pm
- First Name: Mike
- Last Name: Bender
- * REQUIRED* Type and Year of Model Ts owned: 1913 Canadian touring, 1924 Roadster, 1926 Mercury speedster, 1927 Roadster p/u, 1920’s bobtail dirt track racer
- Location: Tulsa OK
- MTFCA Number: 21160
Re: Aschman, Fahnestock, and the K.R. Wilson valve timing tool?
The process was/is intended for setting valves on a worn out valve train only.
You will not get any benefit by doing so. In fact it will hurt performance in your case.
Don’t do it.
You have low use on the cam and lifters.
Set valve lash a .010” on both intake/exhaust per the cam manufactures recommendations.
You will not get any benefit by doing so. In fact it will hurt performance in your case.
Don’t do it.
You have low use on the cam and lifters.
Set valve lash a .010” on both intake/exhaust per the cam manufactures recommendations.