Lynn,
Have you or any of your friends got any experience with the Barnes

pumps?

They have a nice LOOKING lobe style pump that I am interested in.

Thanks

Thanks again.
Bill Jepson

I did not see a three section pump in the line, but they might make

one

for

you.
The five section pumps are used on V-8s, where they recover scavenge

oil

from

the sump in two places, the rear of the right valve cover and the

right

side

of the valley to keep spent lifter oil from falling onto the crank.

The three tooth gears looks like a bad idea from the pressure pulse

peaks

might be off the scale. Aluminum coolers have the short fatigue life

of

aluminum.

The iron or steel pressure section looks like a very good idea. I

may do

that

the next time my Peterson splits open.

I have never seen a Barnes pump. The model powered by the camshaft

are

usually found on sprint cars. I would not put the new rectangular

Peterson on

anything that requires reliability.

Lynn E. Hanover

Lynn,
Another thing I don't understand is - with a flat plate engine sump how

does

the scavenge pump keep primed without a sump to hold some oil. It just

seems

it will start sucking air at anytime ( considering attitude) and lose

prime.

George (down under)

Scavenge pumps are designed to draw air and foamed oil.  This is due to the
fact that without a sump the oil arriving at the bottom plate may be heavily
foamed and there is no place for the air to separate from the oil without a
sump.  A very good reason that dry sump pumps are so expensive.

Bryan

 
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