Here is a photo of the oil pump that I made from Boston Gear
pinion stock.

This design is intended to be used with an external
oil tank containing two cycle oil. It replaces the stock
pump and puts out enough oil at the worst case scenario
of 6000 RPM WOT. In most case that will be an excess of
oil for less than full throttle at lower RPMs. This
is not a problem for aircraft engines as they spend
most of the time cruising at 5000 RPM or so.

This should be about 12 to 14 ounces per hour for a
180-200 HP rotary running at 5000 RPM or so. 
We can make a slightly bigger pump with wider gears 
for higher powered rotaries.

The stock Mazda oil injectors currently in the rotor
housings will be used to inject the oil.

It will of course run at half eccentric shaft speed
just like the stock pump.

The pump cavity in the aluminum block was done with an
NC mill using circular interpolation. (long story) Those
of you that are familiar with NC machine tool programming 
will know what that is.

I have no intentions of marketing this.
If you do feel free.

Paul Lamar
 
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