48 G-TECH/Pro SS/RR Fanatic Manual
8.4
Moving Runs To SD Card File System
When using the G-TECH without microSD card (SS unit, or RR unit with no microSD card inserted) you can record only the
SS runs. Those runs are saved to internal memory.
If you have some runs in internal memory and you power-up the G-TECH with microSD card inserted, G-TECH will offer to
move the runs as shown below:
Use
ROLLER
to select
YES
Press
SELECT
button to confirm
G-TECH will start copying the runs
When copying is done, G-TECH will inform you with this
message
8.5
HP Losses
When doing a horsepower calculation, the G-TECH can directly measure only the time and acceleration of your vehicle.
To calculate horse power, you need to tell G-TECH the exact weight of your vehicle. With those data it is possible to
calculate the net horsepower. That’s the power actually used to move your vehicle, sometimes referred to as wheel
horsepower (whp) or effective horsepower.
Note:
Always perform horsepower and torque measurements on flat road. As indicated above, the G-TECH calculates
horsepower by measuring vehicle’s acceleration. Driving on a sloped road can increase or reduce acceleration when
driving downward or upward. If you can’t use the perfectly flat road, make two measurements in both direction, than
average the results. This way slope errors will cancel each other.
The net horsepower is lower than actual power produced by your engine. That’s because some of the power produced by
engine is lost on aerodynamic drag and various losses in the drive train. Where does that lost power goes? The
aerodynamic losses shed some power on moving the air around vehicle, and overcoming the drag. The drive train losses
include the rolling resistance of tires, friction losses in differentials, friction loses in the gear box, etc. At the end, all of the
losses are converted into heat and sound/pressure waves.