Racelogic Ltd
Power Mode
02/05/2014
Page 27
Power Mode
Your car’s power output can be measured using the Power Mode. There are two parts to this
process: the acceleration run, which gives you the power at the wheels minus the losses caused
by tyre and air resistance. The second part of the test measures these losses and also estimates
gearbox losses. The Power Mode is also an additional tool for car tuning, where access to a
chassis dynamometer is not possible.
Note that this is an estimation of power, and as such when carried out correctly will probably be
within 5% of the true figure. It is very important that the test is carried out on a completely flat road
and the correct procedure is followed very carefully. Power output can only be measured on a car
with a standard manual gearbox.
Power Testing
Please note that due to the nature of this test and the amount of space
required, it is strongly recommended that such measurements are
conducted on private roads.
Setting the Vehicle Weight
In order for accurate measurements to be made, the vehicle weight must first be entered via the
Power Menu:
POWER MENU
UNITS
SET WEIGHT
SETUP
EXIT
The weight you enter must be as accurate as possible - for best results have the car weighed prior
to carrying out any tests as even a small inaccuracy will not give correct power figures, a 10% error
in weight will give a 10% error in power. Use the
▲▼
buttons to increase or decrease the weight
value (Holding down the buttons increments/ decrements faster). Altering the units from the menu
will change the weight values from lbs to kg, and the power values from bhp to kw.
Power and losses runs should be carried out on level ground and always in the same direction,
and it is recommended that power runs are conducted with the car in second gear.
