Hi Paul,
Due to lack of space I'm planning to dry sump my
engine.  I'll be shuttling
oil off to a remote tank by gravity then
electrically pumping it thru a
filter then cooler and back to the engine pickup. Do
any of your archives
tell the engine internal oil pump capacity (gpm) so
I can size the return
pump? Also is there a mathmatical way to determine
the pressure loss in the
return line knowing the tube id, length and head
dimensions?Thanx. DM
(there's already several other Dave's on your list):

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In 1976 for the 13B it was 5 liters a minute or 1.3
gallons
per minute at engine RPM of 1000. I would not be a
bit surprised if
that has not increased since then.

The pressure loss is not only the tube size but the
loss in any 90 degree
fittings you have and how smooth they are.

Remember if the oil pump is sucking down 2 HP the
electric motor
will have to be at least 2 HP. A starter motor is 3
HP. One HP sucks 746 watts
out of the electrical system so that is P (watts) =
V x I (current amps)
so  on HP is 62 amps per HP at 100% motor eff.. At
80% motor eff.
it will be 77 amps per HP! GOOD LUCK :)

Paul Lamar ...No rotor no motor.

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Paul
A return pump used in a system like this is not
required to flow at any pressure greater than that
necessary to raise the oil about 1-2'. Should take
less HP?

Robert


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OK just a scavenge type pump then. Mechanical pressure pump
still in system. OK that will work.