Nitrous Oxide Control

Nitrous oxide (N₂O) is a powerful performance enhancer for race engines, delivering a significant increase in torque and horsepower by providing extra oxygen for combustion and cooling the intake charge. When integrated correctly, it offers controlled, repeatable power gains without compromising reliability.

The DTAFast ECU provides built-in support for nitrous control, allowing precise activation, fuel enrichment, and ignition retard strategies. By configuring nitrous parameters in the ECU’s software—such as throttle position, RPM windows, and progressive control maps—you can ensure safe delivery of the additional oxygen and fuel. This integration enables smooth engagement, prevents lean conditions, and protects the engine from detonation.

Whether used for short bursts in drag racing or as an overtake aid in circuit applications, the combination of a well-tuned nitrous system and a DTAFast ECU allows racers to extract maximum, reliable performance from their engines.

Configuration

The Nitrous Settings are found under the Engine Control section in the menu.

For information on what each setting does, please see the user manual. This is available in the software by pressing F1 at any time.

Live Data

The Live Data section has a new entry for the Nitrous Control. This shows if the nitrous is enabled, and if the condition are met for the ECU to activate the function.

The image below shows that the nitrous control is enabled in the ECU and the user has pressed the arm button, but the function is not active as both the TPS and MAP values are not in the user defined range.

The image below shows that all condition have been met, so the modifiers are now being applied, the selected output has been turned on, and the CAN data has been updated to show the nitrous function is active. 

PWM Control

From V8.01 it is possible to PWM control the NOS solenoid.
By using a PWM control signal, it is possible to modulate the amount of nitrous being injected into the engine.

This is useful to control the increase in torque from a big hit of NOS.
Some of our big turbo drag customers can achieve instantaneous 400 ft-lb of torque increases which will simply spin the tyres. 

PWM values can currently be varied by gear or speed, with the duty cycle modified depending on these values.

Fuel, ignition and turbo duty cycle can all be modified based on the duty cycle of the valve.

Note: All modifiers stack, so if there are multiple modifications entered they will all be applied.