snip
How much do you think an oil pump would use if you were running ATF for
an
independant PRSU system ?

John

I think it is like this: power is volume times pressure.
Unfortunately, I am a metric guy. e.g.

Say: 1 litre / sec * 1 MPa = 1 kW. Then you have to divide by the
efficiency.
1 l/s is a lot. It is 60 Litres per minute, 1 MPa is also a lot it is 10
bar
roughly, or 145 psi.

Say you have 30 litres / minute and 100 psi, it would be .5 l/s * .7 MPa =
.35
kW
This divided by perhaps .85 efficiency gives .41 kW or .55 hp.

Rolf

Thanks Rolf, that sounds like lots of  volume and pressure. Now to figure
out if the CAS shaft and gear can handle 1/2 hp (or 1.5hp better yet) and if
the volume and pressure of the pump is close to that. It shouldn't be too
hard to rig up a test rig like Paul did for his water pump. What is the
general consensus, would an independent lube system for the PRSU be a bonus
or not ?

John


Of course "CAS" crank angle sensor mounted PSRU oil pump.
It just dawned on me :)

The problem with it is this: It will only work on 2nd gen engines.
Third gen and RX8s have done away with the unneeded CAS.
A lot of work but no real market if you are thinking of selling
them. Yes it is an improvement over feeding engine oil however IMHO.

If you can figure a way to add an oil pump to Tracy's box,
drive it off the input shaft or the output shaft
and retrofit it somehow there could be a market.

Paul Lamar ...No rotor no motor.

Paul

Yes built in would eliminate the need for hoses. Perhaps a thin vane pump
like the design I showed you from the Rotrex traction drive would work.
That one was only 4mm thick and about 15mm in circumference. Something
larger would be needed no doubt but the design concept is clever.

DougFir


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