New Oil Pumps and Flywheel Housings

[Terry Burtz, Calif]

The new oil pumps and flywheel housings will be available in September 2025.

I do not have any performance data on the oil pumps being used on the new engine.

I would appreciate your help if you have one of the new engines, a pistol grip infrared thermometer with a laser light, and a tachometer.

Which oil pump are you using?
Stock Model A
Modified Model A oil pump to double the flow areas in the pump
The Leonard Nettles oil pump
Modified V-8 oil pump with reversed intake and output ports
Dan Price oil pump
An oil pump from another engine
A stock Bill Stipe oil pump
A modified Bill Stipe oil pump

Please point the laser-infrared thermometer at the same place on the oil pan during the measurements.

With cold oil (below 150 degrees F), measure and document the oil pressure and RPM at Idle, 1000 RPM, 2000 RPM, 2500 RPM, and 3000 RPM.

With hot oil (above 185 degrees F), measure and document the oil pressure and RPM at idle, 1000 RPM, 2000 RPM, 2500 RPM, and 3000 RPM.

We ran the engineering evaluation engine for 7 hours at 3100 RPM, with an oil temperature of 260 degrees F, and the oil pressure was 4 PSI, so don't be afraid of 3000 RPM.

Please document the weight of oil you are using, which oil pump you are using, and the measured results with cold and hot oil.

You can reply to [email protected] or post on the internet for all to see.

Thank you for your help, Terry Burtz

[emf]

Terry, I have tried to measure the performance of my Model A pump modified according to your instructions with the following results. I have included some photos.

Two caveats: My engine will not idle below 700 rpm (maybe it's the Strombergs...). second, With the engine running for 15 minutes, I could not get the temp gauge (water temp) to go over 140 degrees F. I do not run with a thermostat. Also, running Kleisen's filter with the pressure regulator disabled for this test. I will take the car out today and try to make it heat up. For now, here are the results:

Pump: Modified Model A oil pump to double the flow areas in the pump (per your instructions)

Oil: NAPA 10W-40 (non-synthetic)

Oil Temp = 80*

RPM 700 1000 1500 2000 2500 3000

PSI 15 20 28 36 42 48

Oil Temp = 120*

RPM 700 1000 1500 2000 2500 3000

PSI 7 10 18 25 32 37

I measured the oil temp at the oil pan just in front of the oil pump swell and also on the side of Kleisen's filter. Temps above were measured on the oil pan. Temps on the filter averaged 8*-10* cooler than the pan.



I tried to upload photos, but got an error from 'cloudfare'

[Terry Burtz, Calif]

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EMF,

Thank you for the reply.

In a water-cooled engine, the oil temperature stabilizes around 230 degrees F.

All motor oils thin to near the same viscosity around 185 degrees F.

Is it possible to take readings above 165 degrees F?

Thanks again, Terry Burtz