These Nitrous Express Maximizer 4 nitrous controllers are designed to operate one or two separate stages of nitrous based on time, rpm, mph, throttle percentage, or boost pressure. They monitor the engine’s air/fuel ratio (from an optional wideband O2 module) and automatically adjust the fuel and nitrous solenoid output to achieve the desired air/fuel ratio (target AFR is user-adjustable). As bottle pressure drops toward the end of a run, the Maximizer 4 nitrous controllers will automatically adjust the solenoid output so that you maintain a consistent and safe AFR. Whether your engine is naturally aspirated or forced induction, or gasoline or diesel, the Maximizer 4 controllers feature multiple progression options to cover a variety of racing types.
* Time-based progression: a popular choice for drag racing applications where you always start from a dead stop. Easy to fine-tune so that you leave soft enough to eliminate wheel spin. As you go down track, the controllers smoothly add more nitrous as traction increases.
* RPM-based progression: Great for vehicles that have enough traction to handle full nitrous power at the top of first gear. Allows you to add a little nitrous in the lower engine rpm and ramp into full nitrous as the engine rpm increases. A great option for vehicles with a tight torque converter. Since nitrous flow is limited to a small amount at low rpm, you can safely activate the nitrous at lower rpm, which will help to pull the car out of the hole.
* MPH progression: Great for racers who sometimes begin racing from a dead stop and other times begin racing from a rolling start. Automatically limits nitrous to a smaller shot at low speeds where traction is limited, while providing a larger shot at higher speeds where traction is more plentiful. Bracket racers can use this feature to set a mph nitrous cutoff for the ultimate in consistent ETs.
* Throttle percentage progression: Allows you to “pedal” the car in the event of wheel spin. Nitrous flow smoothly increases and decreases as you work the throttle, allowing you to regain traction and continue racing. This is very beneficial to road race and drifting vehicles. The throttle percentage feature is also beneficial for street cars because it allows you to introduce a small amount of nitrous at mid-throttle, while smoothly transitioning to full nitrous power as you press the throttle to the floor. The feeling is like driving a car with twice the cubic inches.
* Boost based progression: Useful option for use on turbocharged diesels and gasoline applications. Boost progression allows nitrous to come on strong to eliminate that dreaded turbo lag, but then ramps out the nitrous smoothly to let the mighty turbo do its thing. The end result is monster power with zero lag, even with a HUGE turbo. On diesel applications, it will not allow nitrous delivery until the engine starts to see boost, preventing a nitrous engine stall.