Computech DATAMAXX User manual

DATAMAXX
Table of Contents
Getting Started...........................................................................................................................................3
DataMaxx Configuration...........................................................................................................................5
MODULES................................................................................................................................................6
Main Module:........................................................................................................................................6
LCD Module..........................................................................................................................................9
Analog Module....................................................................................................................................11
Remote SD Module.............................................................................................................................12
Exhaust Gas Temperature Module......................................................................................................13
SENSORS................................................................................................................................................15
Record Switch.....................................................................................................................................15
Engine RPM........................................................................................................................................16
Driveshaft RPM...................................................................................................................................18
Input Shaft RPM..................................................................................................................................19
Pressure Sensors..................................................................................................................................20
Exhaust Gas Temperature Probes........................................................................................................22
Low Range Temperature Kit...............................................................................................................25
Accelerometer.....................................................................................................................................26
Oxygen Sensor....................................................................................................................................27
Suspension Position Sensor.................................................................................................................29
Switches...............................................................................................................................................31
Lights...................................................................................................................................................32
SOFTWARE.............................................................................................................................................34
Installing the DataMaxx Viewer..........................................................................................................34
Initial Calibration................................................................................................................................34
Lights & Record..................................................................................................................................36
Overlaying Runs..................................................................................................................................36
Customizing Views..............................................................................................................................36
Shortcut Keys......................................................................................................................................37
Zones...................................................................................................................................................37
Truncating Logfiles.............................................................................................................................37
Creating Custom Calibrations.............................................................................................................38
Software Upgrades..............................................................................................................................38
ADDITIONAL INFORMATION............................................................................................................39
How to Wire Correctly........................................................................................................................39
Avoiding RFI Noise.............................................................................................................................39
Dip Switch Settings.............................................................................................................................40
Recording a Logfile.............................................................................................................................41
SD Card Information...........................................................................................................................41
Event Description................................................................................................................................42
CAN Bus.............................................................................................................................................42
Analog –vs- Digital.............................................................................................................................42
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DATAMAXX
TROUBLESHOOTING...........................................................................................................................43
Data has noise or spikes on graph.......................................................................................................43
LCD Module display data is blank or appears frozen.........................................................................43
A module’s red LED is blinking..........................................................................................................44
“CAN bus fail” message on LCD........................................................................................................44
A module’s green LED is blipping but not blinking...........................................................................45
LCD Display is Blank.........................................................................................................................45
Engine RPM is Zero – Not a Magneto................................................................................................45
Engine RPM is Zero – Using a Magneto............................................................................................46
Engine RPM is Erratic or Noisy..........................................................................................................46
Driveshaft RPM or Inputshaft RPM is Zero.......................................................................................46
Driveshaft RPM is Erratic or Noisy....................................................................................................47
Switch Status is Backwards.................................................................................................................48
Switch is Always ON or OFF..............................................................................................................48
Record Switch Doesn’t Work..............................................................................................................48
Cannot Find Your LogFiles.................................................................................................................48
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DATAMAXX
GETTING STARTED
“PLAN YOUR WORK & WORK YOUR PLAN”
The above quote is something my grandfather has always told me, and this holds true with the
DATAMAXX. If you plan out where things will be installed and take care to avoid ignition components
then your installation will be stress free and your signals will look clear and smooth. If you dive in
without reading the manual, you will get frustrated and your end result may be noisy hard to read
signals, so “Plan your work and work your plan.”
1. Read the entire Getting Started section
2. Fill out the DATAMAXX configuration page
3. Install all modules
4. Install all sensors
5. Run wires while avoiding ignition components
6. Terminate wires into Main & Analog modules
7. Perform your “Initial Calibration”
8. Record a test run to confirm calibration
1. The first step would be to take stock of all the parts you have ordered and try to get a mental
picture of where you want the main module, how your going to mount the sensors and where your
going to run the wires in order to avoid ignition components. The more time you spend efficiently
planning the better off your going to be.
2. The next step is to fill out the DATAMAXX configuration page. This is extremely important
because you need to know exactly where the sensors are physically installed so that we can tell the
software and calibrate them appropriately. Be sure to list what type of sensor it is and refer to the
sensors specific instructions for RTD and GND dip switch settings.
3. It is now time to install the modules (Main, Analog, LCD, EGT). It is recommended that you
locate the main and analog modules in a covered area that is relatively vibration free and not anywhere
near an ignition component. Ignition components include ignition boxes, ignition coils, the wire from
the ignition to coil, distributors, magnetos, solenoids and even ignition kill switches.
4. Now you can install your sensors. It is easier to mount and install all of your sensors before you
run your wires, and will usually lead to a cleaner looking installation. Each sensor has an overview, part
numbers, installation instructions, calibration, and testing associated with it and should be read over
carefully.
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DATAMAXX
5. Once the modules and sensors have been installed we can wire the car. This is by far the most
crucial and important part of the installation process. Sensor wires should be at least 8” away from any
ignition component otherwise your signals will be erratic and hard to read. Ignition components include
ignition boxes, ignition coils, the wire from the ignition to coil, distributors, magnetos, solenoids and
even ignition kill switches. It is recommended to use MSD 8.5mm superconductor wires as these offer
the best protection from ignition interference noise.
If possible you want to run all of your data wires together, on the opposite side of your ignition
components. For more information on the importance of avoiding ignition noise, see “How to Wire
Correctly” & “Avoiding RFI Noise” in the additional information section.
6. We are now ready to terminate the wires into the main and analog units. Use your DATAMAXX
configuration sheet as a guide to where each sensor should be plugged into and utilize the label on the
inside of the lid to help identify the channels. Refer to the sensors individual instructions and “How to
wire correctly” in the Additional Information section. After you are done wiring, confirm that your
installation matches your DATAMAXX configuration sheet.
7. It is now time to tell the software and the hardware what is actually installed on your system.
You can either read the “Initial Calibration” in the Software section, or watch the instructional screen
shot video that was included with your software. If you cannot find your disk then the instructional
video is available on our customer web forum at www.ComputechRacing.com
8. Now that you have installed all of your modules, sensors, and wires as well as performed the
initial calibration we need to test the system to ensure that everything is working properly. It is best to
actually fire up the car at this point as we are looking to see if the pressure and temperature sensors
react in the proper way. If possible put the car on jacks and allow the drive shaft to move enough to
pick up a reading. If any problems occur at this point, refer to the troubleshooting guide, otherwise the
system should be functional and your readings should be smooth and easy to read.
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DATAMAXX
DATAMAXX CONFIGURATION
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Main Module
Engine RPM: __________ Cylinders: _____
Mag RPM: __________ Cylinders: _____ PuP: _____ GND: _____
Driveshaft RPM: __________ Magnets: _____
Inputshaft RPM: __________ Magnets: _____ PuP: _____ GND: _____
Switch1: __________ Light 1: __________
Switch2: __________ Light 2: __________
Analog A1: __________ Sensor Type: __________ RTD: _____ GND: _____
Analog A2: __________ Sensor Type: __________ RTD: _____ GND: _____
Analog A3: __________ Sensor Type: __________ RTD: _____ GND: _____
Analog A4: __________ Sensor Type: __________ RTD: _____ GND: _____
EGT Module Odd EGT Module Even Temp Module
Exhaust 1: __________ Exhaust 2: __________ Temp 1: __________
Exhaust 3: __________ Exhaust 4: __________ Temp 2: __________
Exhaust 5: __________ Exhaust 6: __________ Temp 3: __________
Exhaust 7: __________ Exhaust 8: __________ Temp 4: __________
Analog Module A
Analog A1: __________ Sensor Type: __________ RTD: _____ GND: _____
Analog A2: __________ Sensor Type: __________ RTD: _____ GND: _____
Analog A3: __________ Sensor Type: __________ RTD: _____ GND: _____
Analog A4: __________ Sensor Type: __________ RTD: _____ GND: _____
Analog Module B
Analog A1: __________ Sensor Type: __________ RTD: _____ GND: _____
Analog A2: __________ Sensor Type: __________ RTD: _____ GND: _____
Analog A3: __________ Sensor Type: __________ RTD: _____ GND: _____
Analog A4: __________ Sensor Type: __________ RTD: _____ GND: _____
Analog Module C
Analog A1: __________ Sensor Type: __________ RTD: _____ GND: _____
Analog A2: __________ Sensor Type: __________ RTD: _____ GND: _____
Analog A3: __________ Sensor Type: __________ RTD: _____ GND: _____
Analog A4: __________ Sensor Type: __________ RTD: _____ GND: _____

DATAMAXX
MODULES
MAIN MODULE:
Overview
The Main Module is the heart and brain of the DATAMAXX system. It serves as the communication hub
and has the largest capacity for sensors. The Main Module also has 5 CAN Bus ports that act as the
communication medium to LCD, Analog, and EGT modules.
Capabilities
4 RPM Channels
4 Analog Channels
5 CAN Bus Connections
2 Switch inputs
2 Light outputs
1 SD Card slot
Installation
The Main Module should not be mounted where it is exposed to rain, or excessive engine, exhaust, or
transmission heat. If you are not using an LCD Dash unit then you will need to mount the Main Module
where you can easily access the SD memory card slot. For more information on avoiding ignition
interference refer to “Avoiding RFI Noise” in the Additional Information section.
The Main Module is the only part of the system that receives a power connection. The best Main
Module power connection is the same place you power the majority of your electronics and
tachometers. The next best connection is directly to the positive and negative terminals on your battery.
Connect the positive wire to the Main Module red color-coded terminal labeled “POWER 11-25V” (id
#36), and connect the negative (ground) wire to one of the shield terminal screws.
When installing any sensor with a supplied shield wire, connect to the 4 posts labeled “Braided shield
wires and Chassis/ Battery Ground”. For more information on correctly wiring your DATAMAXX refer to
the “Additional Information: Advanced Wiring Techniques”
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DATAMAXX
Light Scheme
Blinking Pattern for GREEN LED Meaning
Equal time on and off (or bright and
dim)
Normal, samples being created
Short single blips separated by long
pause
Idle, waiting for system process. This normally
occurs for a second or two whenever recording is
stopped. It also occurs during playback on the LCD
Module.
[Main Module Only] Pulsating
(actually a combination of equal time
on and off, with fast blips)
Recording Normal. The equal time on and off
means that samples are being generated by the Main
Module inputs. The fast blips superimposed on top
mean that the module is also recording to the Main
Module’s SD card. Note that the Main Module
green LED will only pulsate like this when recording
to its own card. It will not pulsate like this when
you’re recording to an SD card in the LCD Module!
[Main Module Only] Fast blips Recording but Broken. The fast blips mean that
the module is recording to the SD card. However,
the lack of equal time on and off (to create the
pulsating effect) means that the sensor inputs are not
generating samples. Contact customer support.
Always off No Power. If there’s power, the green LED will at a
minimum blip every few seconds.
Always on This should never happen. If it happens repeatedly,
contact customer support.
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DATAMAXX
Blinking Pattern for RED LED Meaning
Always off Normal, everything’s great
[Main Module Only] Three blips
separated by long pause
SD Card Missing or Full. This is a Normal
condition when (A) you remove the SD Memory
Card, or (B) if it’s inserted but already contains the
maximum of 99 log files, or (C) you have inserted a
card that has NOT been initialized yet by the PC
software. If this error indication persists even after
you make sure to insert an initialized card with fewer
than 99 log files, then there may be a problem with
the card or the DATAMAXX Module. Try a different
card. If the error indication persists, contact customer
support.
Two blips separated by long pause CAN bus problem. This can be caused by an open
wire not reaching this module, or by a short anywhere
on the CAN bus. (It’s OK if this error occurs
immediately after recording is stopped, but then goes
away shortly thereafter.)
Other blip patterns Contact customer support
Default Dip Switch Settings
Additional Information
Recording: The Main Module has a dedicated terminal for a record switch. Connecting a switch to
this terminal (id #35) will automatically enable recording without any additional
configuration.
Wiring: Strip back the insulation for each wire, place into appropriate terminal and screw
terminal to tightly connect to the DATAMAXX. Be sure to connect all shield wires to one of
the four ground / shield drain screws. For more information on wiring correctly, refer to
the “How to Wire Correctly” in the Additional Information section.
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A: MAG PuP OFF E: A1 RTD OFF
B: MAG GND OFF F: A1 GND ON
C: INP PuPON G: A2 RTD OFF
D: INP GND ON H: A2 GND ON
I: A3 RTD OFF
J: A3 GND ON
K: A4 RTD OFF
L: A4 GND ON

DATAMAXX
LCD MODULE
Overview
The LCD Module is an optional feature that allows live data to be displayed right in your vehicles dash.
It is completely customizable and shows 9 separate channels of data per page, with an unlimited
amount of pages. The LCD has customizable warning and shift lights, playback features, night/day
mode.
Capabilities
9 Channels of data per page
Customizable warning and shift lights
Variable speed playback
Night and Day mode
SD card slot
Installation
Your LCD Dash came with a paper cut out that is to scale, which will allow you to drill the necessary
holes with ease. The rubber shock absorbers that act as the mounting bolts should not be removed, and
removal will void your warranty. To connect your LCD to your Main module, use the supplied CAN
cable, put appropriate wire colors into the green LCD connector and connect the other end into any
CAN Bus section within the Main module.
After the module has been mounted, connect the CAN bus cable to the green connector supplied with
your LCD. You can then run the wire from the LCD module to the Main module. Cut to length, strip
back the insulation so the four colored wires can reach a CAN bus port and so the bare shield wire can
be wrapped around one of the four ground posts. Strip a small section of insulation of each of the four
colored wires and place into the appropriately colored terminal, then connect the shield wire to a
ground post.
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DATAMAXX
Additional Information
Customizing: You must use the DATAMAXX viewer software to customize the LCD. Simply open the
Channel Properties screen and choose the “Configure LCD Module” button. This will
open a screen that allows you to choose which sensors you want displayed and the
orientation you want them displayed on the LCD. You can create multiple pages and
combine different data depending on your needs. After making changes, send the
configuration to the DATAMAXX.
Record: Press and release the Record button in order to start recording. The “Recording” icon
will be displayed above-right of the round RPM graph. To stop recording, simply press
and hold the button for 2-3 seconds, releasing after seeing the appropriate response on
the LCD. For more information on recording, refer to “Recording a Log file” in the
Additional Information section.
Menu: In the menu there are options to toggle between day and night, set the clock, and modify
the intensity of the back light, button, contrast, playback rate, and both yellow and red
LED’s.
Channels: The channels button will allow you to toggle through multiple pages that can be
customized through the software, allowing an unlimited combination of information to
be displayed.
Max Recall: Hitting the Max button will display the maximum data from the last log file that was
recorded to the SD card. If there are no runs on the card then a log file not found
message will be displayed.
Run #: Hitting the Run button allows you to toggle thru all the runs currently on your SD card.
After finding the run you want, you can choose either Max or Playback to view the
desired information.
Playback: Hitting the Playback button allows you to play back the data from you last log file at
half the speed (0.5X). To pause the screen during playback, simply press the Playback
button and press again to resume. If you would like to change the rate of playback, enter
the menu options, display adjust, and toggle to the Play Rate and adjust the speed. If you
would like to play back a different run, toggle through the different runs using the Runs
button and then press Playback.
Clock: You can manually set the clock through the menu option or use the software. When
sending a configuration change to the DATAMAXX, if using an LCD, you will be prompted
with a message asking if you would like to set the hardware clock. If you choose yes,
your computers current time will be stamped on the SD card. You will then want to
quickly insert the card into the DATAMAXX, turn on power and allow the configuration to
take place, also changing the clock.
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DATAMAXX
ANALOG MODULE
Overview
The Analog Module allows you to expand your system capabilities by adding 4 analog channels.
Capabilities
4 Analog Channels
Installation
Install the module in a convenient place away from ignition components and connect your Analog
CAN Bus to any Main module CAN Bus terminal.
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DATAMAXX
Light Scheme
Blinking Pattern for GREEN LED Meaning
Equal time on and off (or bright and
dim)
Normal, samples being created
Short single blips separated by long
pause
Idle, waiting for system process. This normally
occurs for a second or two whenever recording is
stopped. It also occurs during playback on the LCD
Module.
Always off No Power. If there’s power, the green LED will at a
minimum blip every few seconds.
Always on This should never happen. If it happens repeatedly,
contact customer support.
Blinking Pattern for RED LED Meaning
Always off Normal, everything’s great
Two blips separated by long pause CAN bus problem. This can be caused by an open
wire not reaching this module, or by a short anywhere
on the CAN bus. (It’s OK if this error occurs
immediately after recording is stopped, but then goes
away shortly thereafter.)
Other blip patterns Contact customer support
Default Dip Switch Settings
Additional Information
Multiple Analog Modules: If you have chosen to expand your capability to multiple Analog modules,
then you will notice that the serial number of your primary analog will start with an ‘A’ and
your secondary will start with a ‘B’ (Serial numbers can be found on the underside of the case).
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A: A2 RTD OFF
B: A2 GND ON
C: A1 RTD OFF
D: A1 GND ON
E: A3 RTD OFF
F: A3 GND ON
G: A4 RTD OFF
H: A4 GND ON

DATAMAXX
REMOTE SD MODULE
Overview
The SD Remote Mag Module is designed specifically for use in magneto cars but can also serve as a
convenient SD card location. Magneto ignition systems output a wide radius of ignition noise that can
cause the SD circuit to stop writing, typically causing the log file to end prematurely. We can solve this
issue by simply mounting the SD Remote Mag Module physically far away from the magneto system.
We also recommend changing your mag kill switch from a “lightning wire” kill switch to a conditioned
relay kill switch. When using a hot wire kill switch you are running the full load of your ignition
system up to the cockpit to the switch and then all the way back to the magneto. This creates a magneto
antenna that significantly expands your ignition noise radius. By using a clean 12V or ground signal to
trigger a relay that will cut the magneto off, you successfully keep all of your ignition noise centered
around the engine.
Capabilities
1 SD Card Slot
Installation
Find a mounting location that is conveniently located and as far away from ignition sources as possible.
Attach using the supplied Velcro. After the module has been mounted, you can run the wire from the
SD module to the Main module. Cut to length, strip back the insulation so the four colored wires can
reach a CAN bus port and so the bare shield wire can be wrapped around one of the four ground posts.
Strip a small section of insulation of each of the four colored wires and place into the appropriately
colored terminal, then connect the shield wire to a ground post.
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DATAMAXX
EXHAUST GAS TEMPERATURE MODULE
Overview
The EGT Module is designed to eliminate the need for multiple wires running to the main module. It
utilizes an analog to digital converter that allows you to run a single wire back to the Main module.
Capabilities
4 Temperature Probes
Installation
First we want to mount the EGT module in a place that is at least 10” from any ignition component,
especially the spark plug wires. The best mounting location is on the firewall or closer to the outward
chassis member. Do NOT mount the EGT module directly to the engine block. Installing the EGT
modules can be somewhat tricky as there are no bolt holes. One way that has proven successful is
mounting to a flat surface using strong Velcro or securing via wire ties.
After the module has been mounted, you can run the wire from the EGT module to the Main module.
Cut to length, strip back the insulation so the four colored wires can reach a CAN bus port and so the
bare shield wire can be wrapped around one of the four ground posts. Strip a small section of insulation
of each of the four colored wires and place into the appropriately colored terminal, then connect the
shield wire to a ground post.
When installing the probes, be sure to make the probe wires “run away” from the spark plug wires and
if you need to cross over a spark plug wire then do so with the probe wire underneath and have them
cross at a 90 degree angle.
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DATAMAXX
Light Scheme
Blinking Pattern for GREEN LED Meaning
Equal time on and off (or bright and
dim)
Normal, samples being created
Short single blips separated by long
pause
Idle, waiting for system process. This normally
occurs for a second or two whenever recording is
stopped. It also occurs during playback on the LCD
Module.
Always off No Power. If there’s power, the green LED will at a
minimum blip every few seconds.
Always on This should never happen. If it happens repeatedly,
contact customer support.
Blinking Pattern for RED LED Meaning
Always off Normal, everything’s great
Two blips separated by long pause CAN bus problem. This can be caused by an open
wire not reaching this module, or by a short
anywhere on the CAN bus. (It’s OK if this error
occurs immediately after recording is stopped, but
then goes away shortly thereafter.)
Other blip patterns Contact customer support
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DATAMAXX
SENSORS
RECORD SWITCH
Overview:
The record switch has a dedicated terminal in the Main module and is actually treated as a sensor that is
either open or closed to ground. You are not required to use this record switch terminal as you have the
option of using the LCD record button or utilizing the software to automatically turn on/off recording
(See Software: Recording)
Installation:
To install a record switch, using the switch supplied by Computech, connect a wire from the Record
input (id #35) to one side of your switch. Connect the other side of the switch to a chassis ground.
Calibration:
The DATAMAXX unit is pre-configured to start recording whenever the record terminal is connected to
ground (which the switch does). If for some reason your record switch does not trigger recording you
will need to open the ‘Calibration/Configuration’ window, click on the configure button for the
‘Record’ channel. In the Basic Settings tab, the type of sensor should be “Switch (Ground is ‘On’)”.
Under the ‘Lights + Record’ tab, select ‘below’ in the Record Automatically section for Warn Level 1
(level should be zero).
Testing:
If you believe your switch is faulty, connect a wire from the record terminal to the chassis ground
screw and recording should begin. If it does not, double check your calibration settings.
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DATAMAXX
ENGINE RPM
Overview:
The DATAMAXX can read your engine rpm by taking a signal from a tachometer or the ignition system. It
also has a separate channel dedicated to reading rpm from magnetos.
Installation:
Electric Tachometer:
If you have an electronic or mechanical tachometer, the easiest method to obtain engine rpm would be
to simply tap into the tachometers signal wire. On most tachometer manufacturers the signal wire
should be the green one. Simply plug this signal wire into the ‘RPM ENG’ terminal (id #32).
Ignition Systems:
Many CDI, electronic, and computer ignitions (such as MSD) have a dedicated tachometer output.
Simply plug this signal wire into the ‘RPM ENG’ terminal (id #32).
Ignition System with External Coils:
If your ignition system does not have an electric tachometer or dedicated tachometer output, but does
have an external coil, then that coil will have one high tension spark plug type wire (typically plugged
into the top center) and two low tension smaller wires (typically screwed onto posts near the top). One
of the two low tension wires will be a suitable rpm signal. If the two wires or terminals are labeled “+”
and “-“, use the “-“ side for your rpm signal. Otherwise choose one side arbitrarily. It is safe to connect
to the wrong one and you’ll realize you’ve done this if you get a very poor rpm reading. In that case,
try the other terminals.
Magneto Ignitions:
We recommend using a mag tach adapter that will accept the noisy magneto signal and condition it into
a clean tach output. Mounting the tach adapter close to the magneto will prevent you from making a
magneto antenna and reduce the amount of problems a magneto can cause to a data logger.
We also recommend changing your mag kill switch from a “lightning wire” kill switch to a conditioned
relay kill switch. When using a hot wire kill switch you are running the full load of your ignition
system up to the cockpit to the switch and then all the way back to the magneto. This creates a magneto
antenna that significantly expands your ignition noise radius. By using a clean 12V or ground signal to
trigger a relay that will cut the magneto off, you successfully keep all of your ignition noise centered
around the engine.
WARNING: Connecting the magneto directly to the DataMaxx will result in a failure and void
your warranty.
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DATAMAXX
Calibration:
The DATAMAXX engine rpm channel is pre-configured to an 8 cylinder, four stroke engine for both
normal engine rpm and magneto. You can however change the number of cylinders and switch between
four and two stroke engines. To change, open the Calibration/Configuration window, and click on the
“configure” button for the engine rpm or magneto channel. You can now change the type of sensor and
the red line value.
Testing:
To test your RPM signal, crank the engine and let it idle. If you have an LCD module, the display
should indicate the correct rpm. Your graph should be smooth in general, but be aware that most
readings will bounce very rapidly within a 25 to 100 rpm range. Keep in mind that many race ignition
systems generate a great deal of radio frequency interference, and that the ignition noise can cause
erratic rpm readings. If you believe you are a victim of this interference noise, then make sure that all
DATAMAXX components, including wires, are as far away from ignition components as possible. Also
refer to Avoiding RFI Noise in the Additional Information section.
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DATAMAXX
DRIVE SHAFT RPM
Overview:
The drive shaft rpm will tell you how many revolutions per minute your drive shaft is spinning.
Part Numbers:
#8010 9” Ford Small Pinion Drive shaft RPM Monitor Kit 1.878”
#8015 9” Ford Large Pinion Drive shaft RPM Monitor Kit 2.190”
#8020 Universal Drive shaft RPM Monitor Kit
Installation:
First verify that the collar (if ordered) fits your drive shaft. The drive shaft sensor is to be passed
through the hole in the bracket and then held in position by the two plastic jam nuts. The sensor should
be pointed directly at the outer edge of the collar and toward the center of the rotating shaft. The exact
position of the sensor in the bracket should be adjusted to achieve a gap of approximately 1/8”. If your
collar is slightly too large, you can shave a small amount off of each end until it fits well.
Connect the white wire to the Main module “DRV WHT” terminal (id #34) and the black wire to
“GND BLK” terminal (id #33).
Calibration:
The DATAMAXX drive shaft rpm channel is pre-configured for use with a 2 magnet collar. You have the
option of a 1, 2, and 4 magnet configuration. To change, open the Calibration/Configuration window,
and click on the “configure” button for the drive shaft rpm channel. You can now change the magnet
configuration by selecting the correct type of sensor from the drop down menu.
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DATAMAXX
Testing:
Testing the drive shaft input can be dangerous. The safest method is to wait until you’re on the track.
Nevertheless, it is possible to test this input by putting the car on stands. Again for the sake of safety it
is not recommended that you run the engine in order to turn the drive shaft and tires. Instead, spin the
tires by hand as fast as you can while the transmission is in neutral. The drive shaft should turn fast
enough to get a very small reading. If you can’t get a reading, you may not be able to turn the tires fast
enough, and should wait until you get to the track.
INPUT SHAFT RPM
Overview:
The input shaft RPM will tell you how many revolutions per minute your input shaft is spinning.
Part Numbers:
#8021 Universal Input Shaft RPM Monitor Kit
Installation:
For the input shaft sensor and trigger installation, please get specific details from your transmission
supplier. The typical sensor gap required for most input shaft installations is approximately .060”. The
use of the Computech supplied pick-up magnet and alignment of the magnet and sensor are critical for
proper operation.
Connect the white wire to the Main module “INP WHT” terminal (id #30), the black wire to “GND
BLK” terminal (id #29), and the red wire to “12V RED” terminal (id #31).
Copyright c 2008 Computech Systems Inc. 20