Question for VW Engine Flyers

Hi Everyone,
I am planning on running a VW 1835cc 78HP engine with reduction.....can
someone give me some kind of idea about the range the oil pressure will
run?? THANKS MUCH for the help!! Ted

Standard for all engines having pressure-lubricated bearings is about
10psi per 1000 rpm at the engine's normal operating temperature. *

As a point of interest, under maximum load a VW converted to 1834cc
would produce about 78hp @ 4000rpm (ie, about 102 lb/ft of torque),
assuming you used big-valve heads and a Schneider 248F cam. At that
level of output, under Standard Day conditions, with a cooling air
differential equal to six inches of water, you could count on between
twenty and thirty SECONDS of run-time before your CHT exceeded the
recommended maximum of 450F. Which would be fine on the drag strip.

(Hint: Before spending any money on your 78hp engine (with reduction),
you might want to ask the seller if he's talking about PEAK or
SUSTAINED output. Peak is fine for hot-rods & dune-buggies but for
airplanes you need to know the engine's maximum SUSTAINABLE output
relative to its TBO.)

-R.S.Hoover

* -- Some engines having oil pumps do NOT deliver oil under pressure
to all of their bearing journals. The VW does so the 10lb/1kRPM is
valid. However, the stock VW oil pressure control spring is designed
to pop-off at 27psi. Increasing the oil pressure is SOP for any high-
output VW engine.