G-Tech Pro Competition User Manual - Ditional Inf

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G-TECH / Pro Competition User Guide, Release 3.1

157

G-tech-Computer Connection

In order to upgrade the firmware in your G-tech or transfer 

data (such as stored runs) to your computer, you must 

ensure that the G-tech is powered on and connected to the 

computer via the supplied serial cable.

Generally you will be doing this indoors, so you can use the 

AC power adapter to power the G-tech.

The serial cable is designed so that only one end will plug into 

the G-tech. The other end plugs into an available serial port 

on your computer. It does not matter whether the G-tech is 

powered on or not when you connect the serial cable.

Note:

If your computer does not have a serial port, you will 

need to use a serial-to-USB converter device. Companies such as 

Belkin, Keyspan, D-Link, and Tripp Lite make these devices. 

Tesla Electronics Inc. cannot provide technical support for any of 

these devices however.

Further instructions are provided with firmware upgrades and 

the PC Analysis Software. Please visit the Tesla Electronics 

website at http://www.gtechpro.com for updates to the G-

tech firmware and the PC software.

Horsepower, Torque & G-tech

This section provides detailed information on the G-tech’s 

horsepower & torque measurements and some guidelines 

and tips to help you get repeatable results.

The G-tech does not measure engine horsepower at the crank, 

which is what the automobile manufacturers and magazines 

typically report.

The G-tech does not measure wheel horsepower either (a 

dyno measures wheel horsepower). As you may know, wheel 

horsepower always measures lower than engine horsepower, 

since it includes drivetrain loss, the rolling resistance of the 

tires on the road, and other factors.

The G-tech measures net horsepower, which reads even 

lower than wheel horsepower. The G-tech’s net horsepower 

value is a measurement of all the horsepower that is available 

to accelerate your vehicle after all power losses have been 

subtracted.

As one example, on a dyno, the vehicle is not experiencing 

any aerodynamic drag (“wind resistance”) because it is not 

actually moving through the air — it is stationary on rollers.