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How are RPMs measured?

   
Old Nov 14, 2010 | 01:01 PM
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How are RPMs measured?
Rotor rotations or e-shaft?

I know the e-shaft rotates 3x per rotor rotation.
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Old Nov 14, 2010 | 01:15 PM
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Originally Posted by defakto
Rotor rotations or e-shaft?

I know the e-shaft rotates 3x per rotor rotation.

E-shaft.
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Old Nov 14, 2010 | 01:40 PM
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the rpm gauge in the car measures it from the coil. if u have something mechanical that u put to the end of a shaft, u'll measure it on the e-shaft.
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Old Nov 14, 2010 | 02:20 PM
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If it's measuring off the coil should still be 3G per rotation of the rotor though, correct? Should give same result as mechanical off the eshaft.
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