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GROUNDS:  

Proper grounding is essential to a microprocessor controlled progressive nitrous controller.  The controller has two ground wires that 
need to be connected.  Proper practice is as follows: 

Ground #1

   12 AWG black ground cable   Install this to a good chassis ground that is grounded securely to the battery as well.

Ground #2

   18 AWG black ground wire   

 vehicle.   

IMPORTANT!

  

consist of any ignition product as well as the 12 AWG black ground cable from the controller

nds are 

to a ground 

ounds to a 

separate point/stud. 

 

1.

Connect the main 8-pin wiring harness to the controller. 
 

2.

Connect the 

WHITE

 wire to a 

+12V fused switched power source

.  You should install this to a circuit that has a 5A fuse and can 

supply two amps to the unit. If this is not available, you should install a fuse holder. 
 

3.

Connect the 

GREEN

 wire to the 

RPM pickup point

. You will define the proper RPM conversion in the software setup. This wire 

boxes and some distributors (12V square wave). For coil-on-plug

equipped vehicles, it can be connected to one of the individual coil signal wires, which is typically a ground trigger. For specific 
applications, consult a factory service manual. 
 

4.

The 

WHITE/BLUE

 

Input 1 Control

used to activate Stage 1

. Connect to either a 

switched 12V or ground microswitch output, or it can be connected to the signal output wire on a TPS with either a rising or falling 
voltage. The signal type is selected in the software configuration. If you are not sure which wire this is, consult a factory service 
manual. 
 

5.

The 

WHITE/RED

 

Input 2 Control

re. This is the trigger wire 

used to activate Stage 2

. Connect to either a switched 

12v or ground microswitch output, or it can be connected to the signal output wire on a TPS with either a rising or falling voltage. 
The signal type is selected in the software configuration. If you are not sure which wire this is, consult a factory service manual.

NOTE:  CH. 1 & CH. 2 trigger input wires can be used together or separate on the TPS sensor.

 

 

6.

The 

YELLOW & ORANGE

 

re programmable in the software for various 

purposes, such as activating a timing retard, etc. These have different programmable output that can be set within the Controllers 
settings.  The 

YELLOW = Stage 1 Output

 and the 

ORANGE = Stage 2 Output

.  If these wires will not be used, heat shrink the 

end and secure it tightly out of the way. 

NOTE: These are low current ground outputs. If using to trigger a high current 

device (over 1 Amp), use them to trigger a relay.

 

 

7.

The 12 AWG 

BLUE & RED

 wires are the 

solenoid ground outputs

. The system works by providing a ground to the solenoids. 

These wires are to be connected directly to the solenoids. Power must be supplied separately to the solenoids by utilizing an
appropriate relay. 

BLUE = Stage 1 Solenoid Ground Output, RED = Stage 2 Solenoid Ground Output

.  

NOTE: These 

channels have a max current rating of 40 AMPS. 
  

8.

The 3-pin connector on the main controller is for an optional nitrous pressure transducer input P/N 15661NOS, this kit includes the 
pressure sensor transducer and cable and is sold separately. Install the sensor at the bottle and plug into the harness.
 

9.

The 4-pin connector is for the hand-held display. 

 

Connecting the NOS Mini 2-Stage Progressive Nitrous Controller to the Touchscreen LCD 

Connect the NOS Hand-held to the main harness.  This is a simple plug and play connection.  If you are going to permanently leave the 
hand-held in the vehicle, you will need to find a factory grommet in your firewall to pass the Display CAN bus connect through and
secure the excess wire away from hazards.  If no factory grommets can be utilized we recommend installing one purchased online or 
from your local auto parts store. 

 
 
 

Summary of Contents for 25973NOS

Page 1: ...allation improper operation lack of reasonable care or all previously stated reasons resulting from incompatibility with Nitrous Oxide Systems Inc assumes no responsibility or liability for damages incurred by the use of products manufactured or sold by Nitrous Oxide Systems Inc on vehicles used for competition or racing Nitrous Oxide Systems Inc neither recommends nor condones the use of products...

Page 2: ...rtain gases such as oxygen and nitrous oxide may combine to produce a highly flammable condition Never interchange nitrous and fuel solenoids Failure to follow these simple instructions can result in extreme engine damage and or personal injury Never drop or violently strike the bottle Doing so may result in an explosive bottle failure Never change pressure settings of safety relief valve on the n...

Page 3: ...2 System Setup TPS Autoset 9 3 3 3 System Setup Stage 1 Stage 2 9 3 3 3 1 Stage 1 Stage 2 Setup 9 3 3 3 2 Stage 1 Stage 2 Graph 11 3 3 3 3 Stage 1 Stage 2 Configuration 11 3 4 Save Load Tune 12 3 5 Controller Setting 13 3 5 1 Touch Calibrate 13 3 5 2 Controller Info Firmware Upgrade 14 3 5 3 Dash Setup 14 Chapter 4 Hand Held Firmware Update 14 Chapter 5 System Operation Testing 15 5 1 Initial Test...

Page 4: ...tc A progressive 2 stage nitrous system works by pulsing each set of solenoids for a user defined start time cycle time and duration This NOS Mini 2 Stage Progressive Nitrous Controller allows the user to drive the solenoids at different times to tailor power delivery to the engine as needed The user can choose to utilize a window switch RPM a throttle position sensor TPS and or a microswitch to t...

Page 5: ...a rising or falling voltage The signal type is selected in the software configuration If you are not sure which wire this is consult a factory service manual NOTE CH 1 CH 2 trigger input wires can be used together or separate on the TPS sensor 6 The YELLOW ORANGE re programmable in the software for various purposes such as activating a timing retard etc These have different programmable output tha...

Page 6: ... of it to prevent shorting out Option 1 Pin Removal Recommended Method Required tools Small flat head screw driver Pin removal tool 567 101 Procedure 1 Use a small screwdriver or other prying tool to gently remove the protective cover from the back of the connector NOTE Be careful not to over extend the tabs on the cover or it will not securely fasten during reinstallation 2 Gently insert 567 101 ...

Page 7: ... the heat shrink a small pull to verify that it is solidly attached Chapter 3 Hand Held Setup 3 1 Home Screen The main screen of the NOS Mini 2 Stage Progressive Nitrous Controller displays the engine RPM Bottle Pressure if equipped Stage 1 Stage 2 activation RPM via colored bars Blue Stage 1 Yellow Stage 2 and Stage 1 Stage 2 ON OFF display ON is only displayed when the solenoids are actively bei...

Page 8: ...Outlet Coil Pack Systems Note Use this setting to expand the RPM range higher than 9900 For example on a 4 cylinder motorcycle this will allow for a higher maximum RPM window In this mode the control can be set at 3000 and 6000 which will activate at 6000 and 12000 This can only be done if the application is NOT a waste fire ignition system 2 12 cylinder engines when the tach wire is connected to ...

Page 9: ...noid 3 3 3 1 Stage 1 Stage 2 Setup The setup menu contains the settings which allow you to enable or disable the stage adjust activation and deactivation RPM and enter the Ramp Builder App Enable Disable Stage When a stage is disabled the stage will no longer activate the bar displayed on the RPM gauge will be removed and the menu selections for the stage will also be removed until the stage is re...

Page 10: ... tailor power delivery to activate when the power can be used most effectively i e delay the nitrous until after launching etc Ramp Time Time in seconds that the ramp builds to the End The more time added here the stage activation will become 0 seconds here will fully activate the stage all at once settings such as start and end will become invalid and not used Stage Duration Time in seconds that ...

Page 11: ... ramp that has been programmed In reset mode the ramp will start over from the beginning when the trigger has been deactivated and reapplied In resume mode once the trigger is deactivated and reapplied the ramp will return to the last point that the system was active and continue the ramp from that point TPAS Mode Throttle position activation switch mode Changes the type of throttle input Choose f...

Page 12: ...r you can choose to allow the software to save under the default name Once complete press OK Your tune is now saved to the SD card Downloading Tunes from NOS Visit https www holley com support nitrous_oxide_systems or alternately visit the product page of your specific kit Download desired tune Insert SD card into computer Save desired tune into the TUNES folder found on the SD card If the tunes f...

Page 13: ...creen 3 5 1 Touch Calibrate If you are having issues with the touch screen not responding or selecting the wrong thing please run the touch calibrate app This will guide you through the process and when successfully complete will calibrate the hand held to more accurately sense the stylus Upload Tune to Controller Delete Tune from SD Card Calibrate the Touch Screen View Controller Info Update firm...

Page 14: ...then select update firmware If you have more than one firmware update available then you will have to select the latest one 3 5 3 Dash Setup The main screen which displays the RPM gauge and bottle pressure can be changed to suit your vehicles min and max RPM limits If you do not have the optional 15661NOS bottle pressure transducer kit you can disable the bottle pressure display in the dash setup ...

Page 15: ... to a tach signal input White Red White Blue wires are connected to TPS or a microswitch Large Black wire is connected to a different ground than the small black wire Large Red large Blue wires are connected directly to the solenoids Solenoids are powered via a 12V relay Orange yellow outputs if used are connected to the proper locations Hand held powers up Nitrous parameters have been programmed ...

Page 16: ...TECHNICAL SUPPORT 1 866 464 6553 NOS Nitrous Oxide Systems Inc All rights reserved Tous Droits Réservés 199R11937 Revision Date 10 17 19 ...

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