Racepak G2X User manual

Table of Contents
INTRODUCTION..................................................................................................................................... 1
DESIGN AND OPERATION SPECIFICATIONS ............................................................................... 2
WHY GPS? .............................................................................................................................................. 2
G2X DATA LOGGER ................................................................................................................................2
DISPLAY DASH......................................................................................................................................... 2
DATALINK SOFTWARE............................................................................................................................. 2
ITEMS CONTAINED IN THE G2X PACKAGE............................................................................................... 3
G2XPRESS INSTALLATION ................................................................................................................ 4
MOUNTING OF G2X AND COMPONENTS................................................................................................... 5
DISPLAY DASH PROGRAMMING ............................................................................................................... 6
INITIAL RUN INFORMATION ..................................................................................................................... 7
DOWNLOADING DATA ............................................................................................................................. 7
BUILDING A TRACKMAP........................................................................................................................... 8
SEGMENTING A TRACKMAP ..................................................................................................................... 8
STANDARD INSTALLATION............................................................................................................... 9
G2X CONNECTION INTRODUCTION.......................................................................................................... 9
MOUNTING THE G2X MAIN UNIT .......................................................................................................... 10
Direction........................................................................................................................................... 10
Location ............................................................................................................................................ 10
Temperature...................................................................................................................................... 10
Electronic Interference ..................................................................................................................... 10
Movement.......................................................................................................................................... 10
GPS ANTENNA LOCATION AND MOUNTING PROCEDURES..................................................................... 11
GPS antenna mounting for stock bodied vehicles............................................................................. 11
GPS antenna mounting for open wheel vehicles............................................................................... 11
Connection of the GPS antenna to the G2X...................................................................................... 11
G2X POWER AND TACHOMETER WIRING .............................................................................................. 11
G2X POWER AND TACHOMETER WIRING .............................................................................................. 12
Power Connection............................................................................................................................. 12
Tachometer Connection.................................................................................................................... 12
Compact Flash Card Installation..................................................................................................... 12
Mounting the G2X Display Dash...................................................................................................... 12
PROGRAMMING AND SETUP UTILIZING THE DISPLAY DASH............................................ 13
SETUP MODE #1..................................................................................................................................... 14
Display Brightness Adjustment......................................................................................................... 15
Reset Dash to Factory Default Settings............................................................................................ 15
Tach Pulse per Two Revolutions of the Engine................................................................................ 16
Engine RPM Source.......................................................................................................................... 16
Progressive Shift Light RPM Step..................................................................................................... 17
Shift Light RPM Level....................................................................................................................... 18
Speed Source..................................................................................................................................... 18

Gear Indicator Ratios....................................................................................................................... 19
GMT Hour Offset.............................................................................................................................. 19
GMT Hour Offset.............................................................................................................................. 20
Units of Measure............................................................................................................................... 20
Set Default Real-time Display........................................................................................................... 21
SETUP MODE #2.................................................................................................................................... 22
Auto Calibrate Engine RPM Pulse Count ........................................................................................ 23
Auto Calibrate RPM 2 Speed............................................................................................................ 23
Auto Calibrate Gear Indicator.......................................................................................................... 24
Accelerometer Orientation................................................................................................................ 24
OPERATION .......................................................................................................................................... 25
G2X STATUS LED’S.............................................................................................................................. 25
PWR LED.......................................................................................................................................... 25
CARD LED........................................................................................................................................ 25
GPS LED........................................................................................................................................... 25
GPS LED........................................................................................................................................... 26
ACQUIRING SATELLITES ........................................................................................................................ 27
SETTING THE START /FINISH LINE......................................................................................................... 28
RECORDING DATA ................................................................................................................................. 29
DISPLAY DASH MODES.......................................................................................................................... 30
DISPLAY DASH PHYSICAL FEATURES..................................................................................................... 31
REAL-TIME DISPLAY MODE................................................................................................................... 32
REPLAY LAP DISPLAY MODE................................................................................................................. 33
SETUP MODE.......................................................................................................................................... 33
DATALINK SOFTWARE INSTALLATION INTO THE USER’S PC........................................... 35
COMPUTER REQUIREMENTS................................................................................................................... 35
SOFTWARE INSTALLATION..................................................................................................................... 36
COMPACT FLASH CARD READER INSTALLATION ................................................................................... 36
GETTING STARTED WITH THE DATALINK SOFTWARE........................................................ 37
DATALINK ONLINE HELP....................................................................................................................... 37
G2X_DEMO RUN DATA FILE................................................................................................................. 38
THE G2X_CONFIG CONFIGURATION FILE................................................................................. 39
SETTING THE DEFAULT CONFIGURATION:.............................................................................................. 39
WORKING WITH THE G2X_CONFIG CONFIGURATION FILE .................................................................... 40
Modifying the Data Logger Setup..................................................................................................... 40
Adding New Devices to Your G2X Data Logger .............................................................................. 44
MAKING THE INITIAL RUN DATA FILE....................................................................................... 49
TRANSFERRING DATA............................................................................................................................ 49
SESSION DIALOG WINDOW .................................................................................................................... 50
MAP SELECT DIALOG WINDOW............................................................................................................. 50
TRACKMAP CREATION (CLOSED COURSE -OVAL &ROAD RACE)......................................................... 52
TRACK MAP CREATION (OPEN -AUTOCROSS,SOLO &HILL CLIMB) .................................................... 54

ADD MAP SEGMENTS............................................................................................................................. 56
ADD INSIDE /OUTSIDE TRACK -OPTIONAL ........................................................................................... 57
LOADING GPS TRACK MAPS ................................................................................................................. 58
OPENING A LAP AND GRAPHING DATA...................................................................................... 60
OPEN A LAP ........................................................................................................................................... 60
DISTANCE MODE GRAPHED DATA......................................................................................................... 61
SPEED AND SEGMENT REPORTS ............................................................................................................. 62
OVERLAY (GRAPHING)MULTIPLE FILES ............................................................................................... 63
ADVANCED FEATURES OF THE DATALINK SOFTWARE....................................................... 65
RUNLOG PAGES -DATA COMPARISON IN REPORT FORMAT................................................................... 65
ASSIGNING REFERENCE AND MAIN FOR RUNLOG DATA COMPARISON.................................................. 66
GRAPH SCALING EXPLAINED ................................................................................................................. 66
GRAPH SCALING VALUES CHANGED PER CHANNEL .............................................................................. 67
CHART SCALING SETS............................................................................................................................ 68
CREATING GRAPH SETS FOR DISPLAY -QUICK GRAPHS........................................................................ 69
HOW TO DETERMINE THE CURRENTLY GRAPHED AND ACTIVE CHANNEL............................................. 70
AVERAGING DATA USING THE AVERAGING CURSOR ACTION ............................................................... 70
GRAPHING DATA FROM AN ENTIRE RUN................................................................................................ 72
ZOOM COMMAND .................................................................................................................................. 72
VIEWING REAL TIME DATA (TELEMETRY) ON YOUR PC .................................................... 75
SETTING UP THE G2X REAL TIME TELEMETRY PARAMETERS................................................................ 75
ENTERING THE DATALINK TELEMETRY FILE PARAMETERS................................................................... 76
STARTING A TELEMETRY SESSION ......................................................................................................... 77
FREQUENTLY ASK QUESTIONS..................................................................................................... 79
TROUBLESHOOTING......................................................................................................................... 81
GPS RELATED ....................................................................................................................................... 81
ENGINE RPM RELATED ......................................................................................................................... 81
SETTING START FINISH WITH DISPLAY DASH RELATED......................................................................... 82
MOUNTING OF THE G2X DATA LOGGER RELATED:............................................................................... 82
SERIAL CABLE RELATED: ...................................................................................................................... 82
COMPACT FLASH CARD RELATED: ........................................................................................................ 82
TRACK MAPPING RELATED:................................................................................................................... 83
TRACK SEGMENTED RELATED:.............................................................................................................. 83
MY PC CAN NOT COMMUNICATE WITH THE G2X VIA THE SERIAL CABLE RELATED:.......................... 84
DOWNLOADING DATA RELATED:........................................................................................................... 84
BUILDING AN OPEN COURSE TRACK MAP RELATED:............................................................................ 85
G2X BOAT CONFIGURATION FILE SUPPLEMENT.................................................................... 86
OPENING THE G2X_CONFIGBOAT FOR USE........................................................................................... 87
PROP INFORMATION............................................................................................................................... 88
PROP SPEED ........................................................................................................................................... 88
PROP SLIP .............................................................................................................................................. 88
ACCEL TIME RUNLOG INFORMATION..................................................................................................... 89

G2X DEMO............................................................................................................................................. 91
PC SCREEN RESOLUTION SETTINGS....................................................................................................... 91
OPENING THE G2X_DEMO RUNFILE...................................................................................................... 92
ADJUSTING THE SCREEN SECTIONS........................................................................................................ 93
ADJUSTING ON-SCREEN FONT SIZE ....................................................................................................... 94
OPENING A LAP...................................................................................................................................... 95
GRAPHING A DATA CHANNEL................................................................................................................ 96
VIEWING DATA IN DISTANCE MODE...................................................................................................... 97
GRAPHING MULTIPLE FILES (OVERLAY) ............................................................................................... 97
REMOVE A DATA CHANNEL FROM THE GRAPH AREA (ERASE).............................................................. 98
DATA COMPARISON IN REPORT FORMAT (RUNLOG PAGES) .................................................................. 98
ASSIGNING MAIN /REFERENCE FILE SETTING ....................................................................................... 99
SEGMENT TIME DATA COMPARISON.................................................................................................... 100
CLOSING A FILE ................................................................................................................................... 100
ADVANCED FEATURES OF THE DATALINK SOFTWARE......................................................................... 101
Channel Grid Display..................................................................................................................... 101
Average / Minimum / Maximum Channel Values........................................................................... 101
Understanding Graph Scaling........................................................................................................ 102
Changing Scaling Per Channel ...................................................................................................... 102
Creating Chart Scaling Sets............................................................................................................ 103
Predefining Graph Sets for Display................................................................................................ 104
Graphing Runfile vs. Lapfile Data.................................................................................................. 105
Zoom Command.............................................................................................................................. 106
RUNLOG PAGES ................................................................................................................................... 107
Session Page ................................................................................................................................... 107
Weather Page.................................................................................................................................. 107
Create GPS Track Map................................................................................................................... 108
Add Map Segments.......................................................................................................................... 108
Lap Zoom........................................................................................................................................ 109
Map Report ..................................................................................................................................... 109
Segment Report / Segment Compare / Speed Compare.................................................................. 110
Tire Temperature / Pressure Calculator Page ............................................................................... 112
G2X INSTRUCTION MANUAL UPDATE SECTION.................................................................... 113
G2X INSTRUCTION MANUAL UPDATES –VERSION 2.7B...................................................................... 114
Chassis Scaling Runlog Page ......................................................................................................... 114
Delta (Difference or Slip) Math Channels...................................................................................... 115
Exporting the Start / Finish Position Runlog Page ........................................................................ 116
Tire Data Runlog Page................................................................................................................... 117
TrackVision Export Runlog Page ................................................................................................... 117
G2X INSTRUCTION MANUAL UPDATES –VERSION 2.8A..................................................................... 120

INTRODUCTION
Thank you for your purchase of the G2X, Racepak’s easy to use GPS equipped data logger. As with any
technical item, the product is easy to use, only if the manual is easy to understand. With that thought in
mind, we have created a manual that provides an orderly process to the installation and usage of the
G2X. This manual covers the basic installation and use of the G2X data logger and DataLink analysis
software.
Thanks again for your purchase. We will be looking forward to hearing from you soon.
Tip: Installation and first time usage of the G2X will be much easier if the demo run, along with
the entire installation manual is read and utilized. While the G2X and Datalink II software is
very user friendly, it requires practice. Attempting to install the G2X, download a run and work
through the Datalink II software, without reading the manual, will cause frustration for the user.
1

DESIGN AND OPERATION SPECIFICATIONS
The G2X was created to provide an economical and easy method to obtain data that was previously
available only when utilizing a standard sensor and wire data system. The combination of the G2X and
Display Dash is designed to be an intuitive package, which provides data according to the action of the
vehicle.
Why GPS?
The use of GPS signals provides track mapping, lap times, segments times and MPH. This eliminates
the need for tripods, multiple trackside transmitters, onboard beacon receiver and wheel speed sensors.
All those items are replaced by simply installing the GPS antenna on the roof of the vehicle.
G2X Data Logger
•Compact Flash memory provides over 30 hours of GPS data logging when used with a 128MB
card.
•Memory card capable of storing single or multiple runs, which are date and time stamped.
•Logging automatically starts when vehicle exceeds 25 MPH.
•Logging stops when vehicle is stationary for greater than 30 seconds.
Display Dash
•Provides ability to set start / finish line at any point on the track.
•Provides lap number and time data.
•Provides vehicle data such as MPH, Engine RPM, voltage and 2 axis accelerometer.
•Vehicle information automatically is displayed when vehicle is moving.
•Lap time and number is automatically displayed each time the start / finish line are crossed and
when the vehicle comes to a stop.
DataLink Software
1. Provides ability to create GPS track map with start / finish and segment times.
2. GPS maps can be saved and utilized any time the vehicle returns to the same track location.
3. GPS maps provide lap and segment times that can be compared to previous data recordings.
4. Provides information in both graphical and report format.
5. Allows overlaying of multiple laps.
2

Items Contained in the G2X Package
1) G2X Data Logger
2) GPS antenna and cable
3) Display dash and cable
4) 12V power / RPM cable
5) Cigarette lighter adapter pigtail
6) Three wire pigtail (power/ground/engine rpm)
7) Compact Flash memory card
8) Serial Communication Cable
3

G2XPRESS INSTALLATION
To assist the customer in becoming quickly familiar with the installation and on-track
use, the G2Xpress Install Guide was created. While this guide provides all the basic
information required for use, review of the remainder of the complete G2X Instruction
Manual is highly recommended, before first time use of the G2X.
4

Mounting of G2X and Components
Data Logger Orientation
1. Direction of travel: The data logger must be mounted with the X in the G2X logo
towards direction of travel.
2. Level front to rear and left to right: Attempt to mount as close to level as possible.
It is not necessary to be dead level, but consistently mount the same, each time.
3. Easy Access: Remember, it will be necessary to access the compact flash card for
downloading data and attaching the serial cable if updating the setup of the data
logger. Hiding the logger typically creates problems for the user.
Power: 12-18 Volts / 1 amp draw
1. Cigarette Adapter: The easiest way to obtain power, with no tach input.
2. Red, Black and Yellow Pigtail: Enables user to install switched power to the G2X
and obtain a tach input (yellow wire) for dash display and data analysis.
Engine RPM (tach input tips)
1. Signal requirement: 50% duty cycle, 5-18 volt square wave signal. This is typically
the type of signal provided by an aftermarket ignition.
2. Late model vehicle tach signal: Depends upon the vehicle. Some have tach outputs
that are compatible with the G2X. Related information can typically be found
using an online search relevant to your vehicle.
3. GMR Sensor: The GMR sensor is the best option to obtain a tach signal for
coilpak, coil on plug or diesel vehicles. Use of the GMR sensor requires a Power
RPM Cable (Racepak PN: 680-CA-PWR-4P).
GPS Antenna
1. Unobstructed view: Mount the antenna on top of the vehicle or in a location that
will not block signal reception. The dash, trunk lid or hood is acceptable locations.
Avoid Electrical Interference: Avoid mounting the antenna or routing the cable
near ignition components, tach wires, radios or even vehicle mounted cameras. If
the GPS is working when the vehicle is stationary or at idle, but loses satellite data
when the vehicle accelerates, electrical interference is the culprit.
Display Dash
1. In reach of driver. Driver will need to access dash to set start finish, review laptimes or
toggle through display channels.
5

Display Dash Programming
The display dash is designed to be intuitive, providing data according to the needs of the
user. The following provides an overview of the dash functions
Programming Options
Mode 1: Setup functions for when the vehicle is not moving, such as brightness.
Mode 2: Setup functions that require a moving vehicle, such as gear ratio (engine RPM vs. speed).
Entering Programming Modes
1. Mode 1: Press left button for two blinks of red shift light LED’s.
2. Short press of right button advances settings (example: brightness from 01 to 02).
3. Short press of left button advances to next function.
4. Long press of left button (three blinks of red shift light LED) saves and exits.
Programming Mode 2 uses opposite buttons. Right button enters and left button advances
Factory Setting for Left and Right Display
Left: Engine RPM Right: GPS MPH
Enabled when vehicle moves or engine starts (with engine RPM input).
Changing what is Displayed on Left and Right Side of Dash
If no engine RPM is connected, vehicle must be moving to change display.
1. Short press of left button advances through Lap#, Disp1, Disp2.
2. Short press of right button advances through L. Time, DSP3, L. Diff.
3. Disp1, Disp2 and Disp3 channels may be programmed by user.
Setting Start Finish for Dash Laptime Display
1. Vehicle must be moving. Try to not exceed 40 mph before setting.
2. Press Left dash button for three blinks of the red shift light LED’s.
3. Release the button when the message Set SF appears.
4. Within 30 seconds of the Set SF message, press the left button once.
5. Laptime and Lap number will display for 5 seconds, each time start
finished is passed. Dash then returns to default display settings.
Reviewing Lap Time and Lap Number
1. When vehicle stops and all data is written to memory card, lap number
and lap time data will be available for review.
2. Right button advances forward one lap at a time.
3. Left button reverses backward one lap at a time.
Clearing Lap Time and Lap Number from Dash
Lap time and lap number data is automatically cleared from the dash, when the
vehicle returns to the track and exceeds 25 mph.
6

Initial Run Information
To Start Logging
1. Enter the track and begin run. When vehicle speed exceeds 25 MPH,
logging will automatically start.
2. Drive or race at normal speed.
3. Insure at least two complete laps are made, on the track. This insures one
clear lap for trackmapping purposes.
Setting Start Finish for Dash Laptime Display
1. Vehicle must be moving. Try to not exceed 40 mph before setting.
2. Press left dash button for three blinks of the red shift light LED’s
3. Release the button when the message Set SF appears
4. Within 30 seconds of the Set SF message, press the left button once
5. Display will return to default display settings.
6. Laptime and Lap number will display for 5 seconds, each time start
finished is passed. Dash then returns to default display settings
Completion of Run
1. Exit track.
2. Come to a complete stop, but do not turn off power to G2X
3. The G2X stops writing data when no speed is detected for 30 seconds
4. Watch the red PWR LED. When the logger has written all data to the
compact flash card, the PWR LED will glow solid.
5. Turn G2X power off.
6. Pull compact flash card.
How Data is Stored on the Compact Flash Card
1. Each run is numbered in order of occurrence. Any time the vehicle
exceeds 25 MPH a file will be started. When the vehicle stops for 30
seconds or longer, writing stops and the file is complete
2. Each file is numbered in consecutive order, starting with 1 (if there are no
other files on the card).
3. The data logger will not overwrite old or existing files, but simply creates
a new file and numbers according to the number of the last saved file on
the card.
Downloading Data
Transferring Data from Compact Flash Card to Users PC
1. Insert compact flash card from G2X into compact flash card reader
attached to users PC containing the DatalinkII software.
2. The first time the card is inserted into the reader, a drive window should
automatically open. Close this window.
3. Select the New Upload icon found in the DatalinkII software
4. Follow the download process as outlined in the G2X Manual.
7

Building a Trackmap
Building a trackmap following download of the first run is of utmost importance. All of the timing
functions (lap and segment) along with data reports are based on the trackmap. If no trackmap is created,
then it is impossible to open laps, overlay and compare data. In a typical inertia and wheelspeed based
data system, the rollout of the tire, combined with wheel rpm provides an approximate distance value, in
order to compute data. Keep in mind this is a GPS based data system. As such, no wheelspeed sensors
are in use, so it is mandatory to build a trackmap in order to obtain distance values. Complete
instructions concerning the building of a trackmap can be found in the G2X Manual. In addition, a demo
run is available in the DatalinkII software, along with instructions for use, in the back of the G2X
Manual. Use the demo run to practice building a trackmap, before going to the track. If a trackmap is not
created following the first run, and subsequent runs are downloaded without a trackmap, the user will
then be forced to manually insert a trackmap in all runs that have previously been saved to the users PC.
Trackmap Tips
1. At least two completes laps on the track are required, before the software
can construct a trackmap.
2. In or out laps are not considered a complete lap.
3. If inside and outside lines are desired, those laps can be made during a run
or at any other time.
Segmenting a Trackmap
Track segmenting is necessary in order to produce all of the segment related reports available in the
DatalinkII software. Segments are created by the use of lateral g data. The start of a corner marker is
defined by the Corner Start number as found in Step 2 of the Add Map Segments Runlog page. The end
of a corner is defined by the Corner End number entered in Step 2 of the Add Map Segments Runlog
page. Complete instructions concerning the segmenting of a trackmap can be found in the G2X manual.
In addition, a demo run is available in the DatalinkII software, along with the instructions for use found
in the back of the G2X Manual. Use the demo run to practice building segmenting trackmap, before
going to the track.
Trackmap Segment Tips
1. Default Corner Start and Corner End numbers are entered by the
DatalinkII software. These numbers may be changed according to the
needs of the user.
2. Segments are created from one lap (as used to create the trackmap) and
are not affected by future downloaded data.
3. Consider the segments markers as GPS plotted points on a virtual
trackmap. Once the trackmap and segments are created and saved, the user
will have that map for use, forever.
4. If a trackmap is not in view when the Add Map Segment page is open
(after a trackmap is created) a complete lap was not used to create the
trackmap. Create another trackmap, using a different lap.
8

STANDARD INSTALLATION
G2X Connection Introduction
Compact Flash Card Port
BEACON (optional):
Input for the onboard vehicle postion reciever.
GPS ANT:
Provides connection for the external mounted GPS antenna.
AUX (optional):
Reserved for future expansion.
EFI (optional):
Provides connection for input from select vehicle EFI units.
PWR / TACH:
Provides connection for external power source and tachometer signal.
RPM 2 (optional):
Provides connection for additional external RPM input.
DISPLAY:
Provides connection for the display dash.
SERIAL:
Provides connection for the RS-232 serial cable, to enable communication between the users PC and G2X.
CFC / POWER LED:
Provides status of the power connection and Compact Flash Card activity.
GPS / SATS LED:
Provides status of GPS satellite acquisition.
COMPACT FLASH CARD PORT:
Insertion point for Compact Flash card. Provides over 30 hours of GPS information, with 128 MB card.
9

Mounting the G2X Main Unit
The G2X is designed to function in a variety of severe environments, but we thought it helpful to
provide a list of the extremes of what not to do, when mounting. As with most electronic items, a bit of
common sense goes a long way in avoiding potential problems.
Direction
The internal accelerometers are pre-defined to provide lateral and acceleration G forces. This requires
mounting the G2X flat and level to the ground and, if possible, orientated as shown in the diagram
below. Mounting of the G2X in a manner other than described will result in the creation of incorrect
data. In the event it is impossible to orient the G2X in the proper direction, the accelerometers can be
reconfigured using the G2X Display Dash. However, the G2X must always be mounted flat and level to
the ground. Refer to page 24 for complete instructions on reconfiguring the accelerometer direction.
Location
There are four items to consider, when mounting
the logger.
•Access to the Compact Flash card.
•Access to the side ports, in order to
connect the GPS antenna, display and
other items.
•Distance from the power and tach source.
Insure the G2X is located within distance
of the power and dash cables.
•Although not required, visual access to
the GPS and Power LED’s on top of the
G2X is suggested.
Direction of Travel
The G2X may be installed in a variety of locations, in stock bodied vehicles. Velcro applied to the
bottom of the G2X will help secure to most carpet and floor mats found in many vehicles. Open wheel
vehicle mounting locations are typically determined by the easiest access to the memory card. Rubber
isolation mounting pads should be utilized, when mounting in a high performance race vehicle or any
other high vibration application. Mounting pads are available from Racepak.
Temperature
While the G2X is a rugged unit, excessive heat from exhaust systems or other sources of high
temperatures can damage the unit.
Electronic Interference
Excessive interference from ignition systems or other EMF producing items can interfere with the
operation of the G2X. Avoid mounting next to ignition system components, such as coils, spark plug
wires, etc.
Movement
It is important to insure the G2X does not move during testing or can become dislodged during an off
track excursion.
10

GPS Antenna Location and Mounting Procedures
Following installation of the G2X, the GPS antenna can now be installed and connected. The antenna
must be mounted at the highest point of the vehicle and level front / rear and left / right. Insure the GPS
antenna cable will reach the G2X, before final mounting of the antenna.
GPS antenna mounting for stock bodied vehicles
The GPS antenna is provided with a magnetic mounting base and should always be mounted on the roof
of the vehicle, centered within the roof area. Insure the antenna is as level as possible, left to right and
front to rear. In the event of a vehicle with a composite roof, Velcro can be utilized. Place a strip of
masking tape on the roof of the vehicle. A small piece of Velcro on the antenna and the tape will be
sufficient to hold the antenna in place. We understand the value of high performance vehicles and the
fact some users will be hesitant to place any type of tape on the surface of their vehicle. In that is the
situation, determine the mounting method you are most comfortable with, but will locate the antenna on
the roof area.
GPS antenna mounting for open wheel vehicles
By following the above instructions, simply insure the antenna is mounted as high as possible on the
vehicle. Various body panels can possible block satellite signals. Insure telemetry or two way radio
antennas will not provide interference to the antenna.
Again, the GPS antenna will function well, in a variety of roof mounted locations. The above guidelines
will insure the most efficient reception of signals, for the G2X. The antenna has been roof mounted and
tested at speeds over 190 mph, so feel free to go at least that fast.
Connection of the GPS antenna to the G2X
Upon completion of mounting of the antenna, simply route the cable to the data logger and connect to
the GPS ANT port of the G2X. Insure the cable end is screwed tightly to the GPS connector. A small
wrench can be used to slightly SNUG the connector. Excessive force can damage the connector,
resulting in failure of GPS signal reception.
!!IMPORTANT WARNING!!
The G2X unit is not water proof. Make sure to mount the G2X in a dry location. If this is
not possible, the G2X unit must be mounted inside of a water tight container to keep it dry.
The G2X dash is water resistant, however it is not water proof. This means it is safe for use
in the rain but not designed to be submerged or sprayed with a high pressure water hose.
11

G2X Power and Tachometer Wiring
Power Connection
The G2X requires 12-18 volt DC power to operate properly. The power cable connects to the input
labeled PWR / TACH on the G2X unit. There are two different pigtails provided to allow for both
permanent power and tachometer connections to your vehicles electrical system or for quick connection
using the cigarette lighter adaptor. If you are using the three wire pigtail to connect the G2X directly to
your vehicles electrical system, make sure the connection provides a 2 – 5 amp fuse to protect against
short circuits. The cigarette lighter adaptor has an internal fuse, therefore no other short circuit
protection is required.
Tachometer Connection
The tachometer connection is optional and only provided on the three wire pigtail. However, when
properly connected and configured, the tachometer input will allow the G2X to display and/or record the
following data.
1. Engine RPM (Displayed on dash and recorded)
2. Gear indicator (Displayed on dash only)
The tachometer input requires a 5-18 volt, 50% duty cycle, square wave output signal. If your vehicle
does not have this type of tachometer output or you do not wish to display and record the above
information you may leave the yellow wire disconnected. The pinout of the three wire pigtail is as
follows:
Red wire – Switched 12-18 volt power
Yellow wire –tachometer input
Black wire – Chassis ground
!!! IMPORTANT WARNING !!!
DO NOT connect the yellow tachometer
input wire directly to any part of the ignition
coil. Doing so will result in damage to the
G2X tachometer input circuitry.
Compact Flash Card Installation
The compact flash memory card should be inserted in the
G2X with the manufacturers name facing toward the G2X
label. The card is fully inserted when the card is sitting
just below flush with the guide. If the card feels like it is
hanging up, gentle move it back and forth until it is fully
inserted. Forcing the card may damage the connector.
Mounting the G2X Display Dash
The Display Dash is designed to mount utilizing three #10
mounting studs and screws. If the dash is mounted using a different method, insure it is properly
secured, to avoid the possibility of breaking free and becoming a projectile that could cause severe
injury to a person and/or your vehicle in the event of an accident or sudden stop. Connect the cable
from the Display Dash to the port labeled DISPLAY on the G2X unit.
12

PROGRAMMING AND SETUP UTILIZING THE DISPLAY DASH
The G2X may be programmed utilizing the Display Dash. There are two Setup Modes available.
1. Setup Mode #1: Utilized to program the system when stationary (the car does not need to be
running).
2. Setup Mode #2: Utilized to program the dash while the vehicle is moving. This is necessary as
several of the variables utilize actual data taken from the G2X to set the programming.
The following sections will refer to short, medium and long button press lengths, as setup and control of
the Display Dash is through the use of the Left and Right Programming Buttons. The length of time that
each button is depressed determines the action that will be performed, according to the current operating
mode.
To assist the user in determining the correct time for each button press, the Programming Indicator (Red
shift light LED’s) will flash each time one of the key press becomes valid. The chart below defines
each:
1. Short Press = .2 seconds = One Flash
2. Medium Press = .5 seconds = Two Flash
3. Long Press = 2 seconds = Three Flash
4. Auto Repeat Long Key Press = 3.0 seconds (repeats every .2 seconds)
The point at which the button is released determines the type press that is accepted. Releasing after the
second red shift light flash is detected as a medium length press, by the G2X.
!!! IMPORTANT WARNING !!!
The Serial Cable must be disconnected from the G2X data logger during the Dash Setup Procedures.
If the serial cable is connected during programming, no programming changes will occur.
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Setup Mode #1
Setup Mode 1 is used to program the unit with default information, without the need to operate the
vehicle. Setup Mode 1 presents the programming choices in the following order.
1. Display Brightness
2. Reset all Dash Settings to Factory Defaults
3. Tach Pulses Per Two Revolution of Engine
4. Engine RPM Source
5. Progressive Shift Light RPM Steps
6. Shift Light RPM Level for Gears 1-6
7. Speed Source
8. Gear Indicator Ratios
9. GMT Time Offset
10. Units of Measure
11. Set Default Real-time Display
Setup mode 1 can be entered either from the Normal or the Lap Replay Display modes.
To enter Setup Mode 1:
1. Press and hold the left key button to send a medium key press (two flashes and release).
2. The following message will be displayed.
3. To confirm you wish to enter Setup Mode 1, press and release the left Programming Button to
send a short key press.
While in Setup Mode 1 the left key presses will always execute the following commands.
Short left press: Accept selection and go to next setup parameter
Long left press: Save programming and Exit Setup
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Display Brightness Adjustment
Brightness adjustment ranges from a minimum brightness of 2, to a maximum brightness of 15
Each press increases or decreases by 1.
1) Increase Brightness: Short right press - At 15 returns to 2.
1) Decrease Brightness: Medium right press - At 2 returns to 15
Short left press: Accept selection and go to next setup parameter
Long left press: Save programming and Exit Setup:
Reset Dash to Factory Default Settings
This screen is used to reset the dash to factory configuration. To reset, select Y as shown below. When
the screen is exited the dash will be reset to factory defaults.
2) Y or n: Short right press or Medium Right Press - Toggles between Y and n
Short left press: Accept selection and go to next setup parameter
Long left press: Save programming and Exit Setup
The Default Factory Dash Settings Are As Follows:
V-8 Engine RPM Tach Signal Input with 8 pulses per two revolutions
8000 RPM Shift Point
100 RPM Spread Between Sequential Shift Lights
Speed obtain from GPS
Engine RPM Source - Tach
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Tach Pulse per Two Revolutions of the Engine
Set the number of pulses from the tachometer signal for two revolutions. The correct setting would
typically match the number of engine cylinders. For example, a V-8 would set at 08.
The key commands are as follows.
3) Increase pulse count by 1: Short right press - At 20 returns to 0
4) Decrease pulse count by 1: Medium right press - At 0 returns to 20
Short left press: Accept selection and go to next setup parameter
Long left press: Save programming and Exit Setup
Engine RPM Source
The dash can use the input from the PWR/TACH port on the G2X or from the EFI module if installed.
This rpm is then used for display, shift light, gear ratio, etc. The user is prompted to choose either yes or
no to EFI rpm input. No, will instruct system to utilize the PWR/TACH port on the G2X.
1) Y or n: Short right press or Medium Right Press - Toggles between Y and n
Short left press: Accept selection and go to next setup parameter
Long left press: Save programming and Exit Setup
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