The Dyno 3.0 comes with additional features that is not on the Dyno 2.0. Although they both operate between 8 to 22 volts DC, the switch at the rear of this dynamometer provides the option to switch between reading the incoming voltage or the speed of the car. Secondly the potentiometer at the rear gives you the ability to change the input voltage from 5 volts to a maximum input voltage of 22 volts. A 1 to 4 amp power supply should be adequate to run most HO cars on the dyno. At low voltage settings below 7 volts, VRP recommends removing the idler gear on a T-Jet and the rear axle on the inline cars. Unlike the Dyno 2.0 the Positive + side of the power supply must be connected to the (Red) terminal of the Dyno, and the Negative - must be connected to the (Black) terminal. Reversing the DC power input leads will not damage the dynamometer; however the meter will not work. An external Power Supply is needed to run the Dynos. See our website under power Supplies.Features Include: 5 Digit Meter W/Red display to read incoming voltage 4 Digit Display in Dyno Mode - For increased accuracy On/Off Switch (Built into Potentiometer) Adjustable voltage from 5 to 22 volts Roller feature for smooth running Brand new electronics for better accuracy Adjustable screws in top plate to change car down-force to observe torque differences
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