Questions on Testing 1926 DB 4 Cylinder 6 Volt Generator

[DB26]

I just re polarized my generator, and got a different set of readings for you. 

 

Generator output before diode, at idle:

 

Ranging from 3.80 to 4.40 volts, and after a few minutes dropped to 1 volt. I think the idle settled down. 

 

Generator output before diode, at higher RPM:

 

About 7.00 volts

 

Reading after diode at idle:

 

6.05 volts

 

Reading after diode at higher RPM:

 

About 7.00 volts

 

Reading at battery negative post at idle:

 

6.15 volts

 

Reading at battery negative post at higher RPM:

 

6.60 volts.