The following conditions will help the PA to produce the most accurate performance results.
· Correct total vehicle weight including fluids and driver weight.
· Flat road surface.
· No or little outside wind.
The vehicle weight specified should be the current weight of the vehicle at the time of the test. Including, number of occupants, fuel tank level, any items being carried in the car.
Underestimating the vehicle weight will produce lower performance figures. Overestimating the vehicle weight will do the opposite.
Aerodynamics
PA takes into account aerodynamic drag when calculating engine performance. Vehicle drag co-efficient and frontal area are the parameters required to calculate power lost to aerodynamic drag. These parameters are known by RSTuner after connection to the vehicle.
How does the PA compare to a chassis dynamometer
PA gives real world performance figures in power at the wheels. Not a single correction is made during calculation of the result. This is the power that the vehicle is putting down onto the road, plain & simple.
Every chassis dynamometer is different with different cooling setups. Therefore results will vary amongst different dyno’s.
NOTE: PA results are influenced by outside conditions like wind and road surface.