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QUESTION:
How does the WarP/ImPulse motor efficiency compare with that of ADC motors?
ANSWER:
The advanced timing of the WarP Motors (which allows higher voltages and currents to be used without arcing) results in the motors being "slightly" less efficient at slow speeds and low power levels and "slightly" greater at high speeds and higher power levels. The WarP Motors will spin more RPM's per volt and produce greater ft. lbs of torque and HP. It seems many of the graphs with ADC motors are done at 75 volts, whereas NetGain uses 72 volts - some people don't catch that, and it makes a difference!
To understand the motor efficiencies, you really need to look at the dyno spreadsheet data. The WarP 11 actually hits 91% efficiency - which is about the highest efficiency claimed for a series wound motor. Larger brushes, fan design & composition, wire diameters (depends upon source for that batch of motors...) larger laminations (9.25" diameter versus 9.0") used in the WarP Motors, and larger bearings will cause a slight variation in efficiency. The bottom line is that the efficiencies of the ADC 9 and WarP 9 are so close that from the engineers' viewpoint they usually say "they're the same". The same holds true for the old WarP 8 and the ADC 8. The ImPulse 9 should be looked at as an "improved" 8" motor.
A comparison graph of the ADC 9 to the WarP 9 has not been produced, but the following is a graph of the ADC 8, WarP 8, and ImPulse 9 - all plotted at the same voltage (with the NetGain motors extrapolated to 75 volts to match the ADC). What people need is the greatest ft.lbs. at the highest RPM and lowest Amp draw - the ImPulse 9 is a clear winner (plus it has ~30% greater brush area and other beefy components from the WarP 9).
If a customer is referring to the extrapolated graphs found on some dealers web pages he should be aware that they are probably inaccurate. ADC has recently informed NetGain that they no longer NOT advance time any of their 8" or 9" motors! (though it has been widely accepted and known that they were advanced 8-10 degrees in the past ) The degrees of advancement from where ADC advanced their motors is quite a bit different from the way NetGain does it. We were recently notified that although the ADC motors still had advanced holes the last time they came in for repair - the holes had been filled with plugs so as to make it difficult to change the advance. If this is still the case and the Dealers/Distributors are aware of it, they could still be claiming that ADC offers advanced timing - though as mentioned previously - the degrees are NOT the same as what NetGain does.
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