NOS tuning

For those who don't want to pay hundreds of dollars for a Progressive Nitrous Controller, there are '2 stage' nitrous controls units. This means that the nitrous flow is delivered at two levels. The first level comes in (at a reduced nitrous flow rate) and then the second level (At full flow) comes in after a delay. The length of delay is user settable and can be fine-tuned for best results.

You can use a microprocessor controlled nitrous time delay switch to activate a second stage of nitrous oxide or use it to delay your single stage to help traction.

2-Stage units are simple (but effective) and of course, cheaper than a Progressive Nitrous Controller unit.


Delaying the nitrous line - Why this is important?

A need for a delay in turning on the nitrous solenoid sounds so reasonable for compensating for the fact that the nitrous moves along the pipes faster than the fuel as its pressure is greater than the fuel. If the solenoid to injector lines are long this effect is more noticable, or if the power level is set very high.

It is always safer to overfuel the engine rather than running lean, even for a very short time



Tube Bending Tool

A very special tube bending tool from NOS, is designed for tight radius bends and will greatly simplify tube bending with very professional looking results. Excellent for use on any direct port type nitrous kit.



Nitrous Switch Center

Dynotune's nitrous oxide switch centre (nitrous switch center) puts all your switches in one place. It has bottle opener, system power, bottle heater and purge switches mounted in a neat billet aluminium round housing.

You can mount the switch center in a pod or any 2-1/16" hole. It works with all types of remote bottle openers, DynoTune, NX, compucar, Zex, NOS etc...



Nitrous and Fuel Solenoids Explained

Their job is to switch the flow of nitrous or fuel on and off.

The solenoid part of the unit is an electromagnetic device that applies a magnetic field to the valve's plunger when an electric current is applied to it. The valve part of the unit is what starts or stops the nitrous oxide or fuel flow. Put together we have an electrically controlled valve. Put 12V on it and it opens the valve, take the 12V off and it closes the valve.

In regular nitrous oxide setups the solenoid is simply switched on to start the flow and off to stop it. The electric current coming from the wide open throttle switch.

In setups with progressive or staged controllers the solenoids are 'pulsed' which is where the name 'pulsoid' comes from with some manufacturers. The pulse rate is constant but the width of the pulses is altered to make the valve's 'duty cycle' higher or lower. The more 'on time' that the solenoid gets the more nitrous or fuel it flows.

Typically the valves are pulsed at 20 times per second. If the pulse width is 1/20th of a second then 20 pulses at 1/20th of a second equals a valve that is open all the time. If the pulse width is 1/10th of a second then it is open half of the time. This method of control is known as 'pulse width modulation' or 'PWM'.

In a 2 stage nitrous controller, the first stage of nitrous is a reduced 'shot' and then, after a programmable delay has expired, the full shot of nitrous is injected.