Quote:
Originally Posted by FlatheadTed
...The pump spring on the scales was compressed to 1/2 " to get 2.1/2 Lbs....
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Ted, With your scale, and with the Ford Spec in mind as posted by JWL (The Ford spec for the spring is 6.12 to 7.40 pounds at .625 inches.), See what you get through the range of a normal pushrod throw. With your "miniscule" and Charlies "one pound or more", it would be good to know which is more accurate.
I can see how a misunderstanding of goals can skew the answers of such a question, being that the throw of the pushrod would be shortened or extended at either the beginning or the end of the spring compression, the former being zero pressure, the latter being full pressure. How to reconcile for a clear answer is the burning question!