Posted by pete 23 on April 16, 2012 at 20:39:04 from (74.32.231.176):
In Reply to: Farmall H M Governor posted by LarryM on April 16, 2012 at 19:56:06:
An M governor that is in good shape should do just that. Starting at 1595 high idle rpm should have throttle plate in carb full open just before you hit 1450rpm. Torque rise after that point will depend on what is in the engine for pistons etc. Remember, when reading the dyno that is set to read horse power at 540 rpm that any reading above that rpm is actually reading low and any reading below 540 the horse power is actually less that what it is showing unless the torque rise is sufficient to equal the loss of rpm. That usually takes over 25 percent torque rise to maintain horse power at lower rpms. I used to rebuild many , many governors when dyno testing as that was the number one cause of loss of horse power. The engine still had the pulling power(torque) but it occured at a much lower rpm therefore lacked the snap to get in there and dig before it dropped out.
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