ROM Features – These are the features our dealers can setup for you on a NepTune chip without any extra hardware. A small license fee is required to be tuned on NepTune.
*Fuel/Ignition Maps
Primary and Secondary Maps Primary and Secondary low and high cam fuel and ignition maps. 8 maps total. 24 load breakpoints by 24 rpm breakpoints for precise tuning. Low and high cam both can be scaled to go to 11000 and above
*Rev Limits/VTEC
Rev Limits Per Gear
Fuel And/Or Ignition Cut
High and Low Cam Rev Limits Low cam rev limit doubles as a cold limit
High and Low Load VTEC Engagement RPMs Separate engagement RPMs for low and high load
TPS threshold decides low/high load This option decides whether to use the low or high load engagement RPM
Minimum load for engagement This option only allows VTEC to engage above the specified load
Disengage below minimum load When VTEC is engaged this option determines whether or not to disengage below the minimum load or disengage below the set engagement RPM
Minimum Speed
Minimum ECT
VTEC Disable For Non-VTEC setups
VTEC Speed Threshold Disable Allows VTEC to activate at launch or on setups without a VSS
VTEC Temperature Threshold Disable Allows VTEC to activate while the car isn’t fully warmed up
VTEC Pressure Disable For setups without a VTEC Pressure switch
VTEC Error Check Disable Only suggested for race vehicles
New and old injector size Can be used with the overall trim to rescale for new injector sizes
Overall Fuel Trim Globally applied fuel correction
TPS Tip-In Fuel Trim Correction to accurately tune TPS Tip-In for different size injectors and different setups
Cranking Fuel Trim Fuel correction for Raw Cranking Fuel Maps
Post Start Fuel Trim Correction for fuel delivered immediately after startup
Adjustable ECT vs Raw Cranking Fuel Maps Used to determine how much fuel is used to start the engine
Adjustable ECT vs Fuel Enrichment Maps Used for cold start enrichment
Adjustable ECT vs Ignition Correction Maps Used for cold start correction
Adjustable IAT vs Fuel Enrichment Maps Complete fuel correction for weather changes
Adjustable IAT vs Ignition Correction Maps Ignition correction for intake temperature
Adjustable Gear Based Fuel Enrichment Maps Allows balancing of air/fuel ratios between different gears
Adjustable Gear Based Ignition Correction Maps Can be used as an aid for traction
Adjustable Idle Ignition Corrections
Adjustable Ignition Limitations For Ignition Maps
Adjustable Ignition Dwell Control
Adjustable Tip-In Ignition Corrections
Adjustable Individual Cylinder Fuel Trim Allows adjustments to fuel to obtain equal individual cylinder EGTs and more
Injector Battery Compensation Allows adjustments to fuel based on battery voltage
Target Idle
ECT vs Target Idle maps Fully adjustable ECT and target idle values for the startup idle maps
IACV Duty Cycle Adjustment Allows adjustment of IACV duty cycle to help you reach your target RPM
*AC Cutoff
Above RPM
Above TPS threshold
Idle Recovery Disengages the AC clutch below this RPM to help regain control over a low idle
Activation by MPH No need for a clutch switch!
Activation by TPS threshold Rev until any RPM you choose, cross the TPS threshold and it holds that RPM
Activation by switch/clutch switch Can be used to turn 2-step on/off or used as a clutch input
MPH threshold for 2-step Can help limit you off the line to keep traction under control
Ignition Retard/Fuel Enrichment Allows you to build boost off the 2-step
TPS threshold for retard/enrichment Allows you to pre-stage on the 2-step before building boost
Full Throttle Shift Holds the target RPM during shifts. Requires use of a clutch input
Selectable clutch switch input Several inputs to choose from to fit what’s available
*Outputs (2)
Activation Input Not required for activation but can be used as an on/off switch
Activation Output Several outputs to choose from
Minimum RPM
Maximum RPM
Minimum Load
Maximum Load
Minimum speed
Minimum Throttle Position
Minimum Intake Air Temperature
Maximum Intake Air Temperature
Minimum Engine Coolant Temperature
Maximum Engine Coolant Temperature
Ignition Retard By RPM Retards ignition while activated
Fuel Enrichment By RPM Adds fuel while activated
Switch maps on activation Ability to use secondary maps to completely tune for nitrous
Disable on FTL/FTS
Disable if MIL code
*Boost Control For use with dual, tri, and quad stage boost controllers
Activation Input Not required for activation but can be used as an on/off switch
Activation Output Selectable outputs for each stage of boost
Minimum RPM
Minimum speed
Minimum Throttle Position
Boost Cut Keeps you from going over a determined safe level of boost
PWM Based Boost Control
Variable Frequency For Multiple Solenoid Types
Quick Spool Duty Cycle And Load Setting Allows you to hold a specific duty cycle until the load condition
Set Duty
Boost By Gear
Boost By Gear vs RPM
Low/Hi Boost Switch Input
*Fan Control Allows full control of what temperature the fan is activated
Activation Output
Minimum Engine Coolant Temperature
Maximum Speed
*Switch Maps
Flexible Dual Map Setup Primary and secondary maps can be setup to use MAP or TPS as load reference, Load and RPM breakpoints can be completely different. Can be used for extending load points/rpm breakpoints, alpha-n scaling, pump/race tunes, etc
Activation Input Not required for activation but can be used as a switch between the different maps
Minimum RPM
Minimum Load Optional setting, can be disabled. For use with maps extending onto the secondary maps
Minimum Throttle Position Optional setting, can be disabled. For use with Alpha-N scaling for ITB tuning
Use High Cam Maps Only Can be used to tune VTEC setups using one set of maps only
Required Inputs Can require multiple inputs to be set or unset
Optionally Required Code Code is entered via presses of the TPS and Brake Pedal
Valet/Fallback Mode Allows vehicle to start with adjustable rev limit as valet or fallback for Anti-Theft
*Closed Loop Control
Full Wideband Support Works with full 0-5v scale
Target O2 Voltage Can be changed to set target closed loop a/f
Disable Closed Loop Above Load Beneficial to small turbo and supercharged setups that build boost even at partial throttle
Other Conditions Conditions for ECT, IAT, and RPM
Adjustable Voltage Error Disables closed loop in the event of sensor failure
Disable Closed Loop Error Option
*Sensors and more
Disable Knock Sensor
Disable Injector Test Circuitry Many EDM/JDM ECUs do not have this
Disable BARO Sensor Many EDM/JDM ECUs do not have this
Disable ELD
Disable O2 Heater Allows use of 1 wire O2 sensor or no O2 sensor if Closed Loop is disabled
Disable IACV Error For vehicles that don’t have an IACV hooked up
Disable IAB
IAB Activation RPM
MAP Sensor Support Support for a wide range of map sensors from stock up to 5 bar and beyond via custom map settings
Sensor Adjustments Allows fuel, ignition, and PWM duty cycle to be altered based on a 0-5v analog input
4 Programmable Analog Inputs Allows logging of any 0-5v sensor. Breakpoints are fully configurable.
Service Input Allows you to change the service input to any other input or none at all. This frees up the service connector to be used as a switch for one of the other options. Codes are also shown with the car off key in the on position with the throttle over 65%
Clear Codes With The Brake Pedal If you wish to clear codes in memory you can press the brake pedal while checking your codes to clear them from memory
Adjustable Fuel Prime Time
MIL Shiftlight Per Gear Activates the MIL at the specified RPM
Adjustable Deceleration Fuel Cut Load, Speed, and TPS dependent
Lock Ignition Timing Lock ignition steady to set ignition timing
Injector Kill To kill the engine without keying off