G-Tech Pro Competition, User Manual

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G-TECH / Pro Competition User Guide, Release 3.1
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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.