Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 04-22-2013, 08:05 PM   #1
Johnnyj
Member
 
Join Date: Jan 2013
Location: Greenville, sc
Posts: 30
Default 1947 starter torque

How tight can an engine in a 1947 1/2 ton be before the starter cannot crank it over. Does anyone know the torque value for that starter
Johnnyj is offline   Reply With Quote
Old 04-22-2013, 08:31 PM   #2
Tom Wesenberg
Senior Member
 
Tom Wesenberg's Avatar
 
Join Date: May 2010
Location: Mpls, MN
Posts: 27,480
Default Re: 1947 starter torque

My 1960 Motor's Manual is handy but only goes back to 1953 and lists the torque test as 700 amps, 3.5 volts, and 16 pds. ft. torque.
Tom Wesenberg is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 04-22-2013, 08:52 PM   #3
PC/SR
Senior Member
 
Join Date: May 2010
Location: Santa Rosa, CA
Posts: 1,183
Default Re: 1947 starter torque

My old MOtor Manual lists the 1938-48 as 100 RPM cranking speed, 14 lb of torque, 550 load amps, 45-60 spin amps. I am surprised at the low torque, but then the gear ratio to the flywheel is a substantial multiplier.
To tie this into this forum, I would guess that the model A starter is not much different because there is some interchange on the parts. My mix and match 12 v conversion has a 56 field coils, Model A end plates and flathead armature. Others may have more info.

Last edited by PC/SR; 04-22-2013 at 09:02 PM.
PC/SR is offline   Reply With Quote
Old 04-22-2013, 09:28 PM   #4
MikeK
Senior Member
 
MikeK's Avatar
 
Join Date: May 2010
Location: Windy City
Posts: 2,883
Default Re: 1947 starter torque

Sponsored Links (Register now to hide all advertisements)
The starter drive to ring gear ratio is very close to 15:1. If you put a torque wrench on the front crank bolt and it turns over with less than 150 ft-lbs then a starter that gives more than 10 ft-lbs of stall torque will turn it. If 150 ft-lbs doesn't budge the crank forget the starter, fix the motor!
__________________
Mechanical engineering 101: If you put an adjustment knob, screw, bolt, or tolerance specs on something, some people will immediately fiddle with it. If you mark it DO NOT TOUCH everyone will mess with it.
MikeK is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 03:32 AM.