59a oil pump capacity.

[OHV DeLuxe]

I have pulled apart a 59a engine to control everything and replace a few parts.
Story on the engine is that it was NOS up until 1989, put into a 1939 pu and driven very little for about 10 years before i bought it and forgot about it for 20 years.
As expected everything is std size and looks great.

The original oil pump, it looks as good as everything else and made good 15psi at hot idle, i have absolutely no reason to doubt it, and compared to the 30 others i have in the loft it looks new.
Will a good condition stock oil pump be enough for additional oiling like what is required for a McCulloch or OHV heads?

Thanks.

 

[40 Deluxe]

I have pulled apart a 59a engine to control everything and replace a few parts.
Story on the engine is that it was NOS up until 1989, put into a 1939 pu and driven very little for about 10 years before i bought it and forgot about it for 20 years.
As expected everything is std size and looks great.

The original oil pump, it looks as good as everything else and made good 15psi at hot idle, i have absolutely no reason to doubt it, and compared to the 30 others i have in the loft it looks new.
Will a good condition stock oil pump be enough for additional oiling like what is required for a McCulloch or OHV heads?

Thanks.

Well, McCulloch superchargers were popular back in the '30's and '40's so the original oil pumps worked then. Should work now.

 

[Bored&Stroked]

If it was mine, I'd put a later 49-53 pump in it - with the correct pickup (which Speedway has) . . . for added volume and pressure. Then, stretch the front oil-pressure relief spring so the one in the pump becomes the "pressure boss". Why not increase the oil volume and the pressure a bit. A good used 49-53 pump is just fine . . . or buy a new Mellings - do not buy the Speedway RePop one . . . have had issues with them.