The documentation that comes with the Integy Dyno will get you up and running but doesn't help much with using the #'s you get. I emailed Integy about it and was told to tune in this order:
1. Use 3-4 volts
2. RPM (higher # better)
3. Amp Draw (higher # better)
4. Comm Interference (lower # better)
The comm interference # is there to give you an idea if the motor is due for a rebuild. For example if a motor that usually gave a 15 for comm interference jumped up to >40 then its probably time for a comm turning.
Because the Integy doesn't apply a load to the motor, certain changes that look good on the dyno (lighter springs=higher RPM) won't necessarily work on the track (brush arcing/bounce=low power/high glitch).
I have the Integy & Robi dyno's. Generally, if the Robi says its good, then the Integy will say its good, then my lap times will tell me its good.
I would really like to hear the opinions of others who have access to multiple dynos considering the price difference between the Robi & the Integy.