' impressive performance'
1) At 10-RPM on a tabletop tester?
2) At 300, 600, and 900 RPM in the Diesel engine test?
3) Do you know of an automotive engine that will run at 300-rpm?
4) 600-rpm IS quite common for 'idle' speed of automotive engines.
5) 900-rpm isn't even 'fast-idle' during 'cold warm-up' open-loop operation, or during a 'choked' carburetor, on all those 1991 MotorSilk 'worn-out' engines ( maybe those engines were worn out in the manual transmission cars by owners who tried to let out the clutch at 900-rpm in first gear, causing the entire powertrain to chug and buck ).
6) How about 10,000-RPM ?
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