Nitrous "The Other Power Adder"
 

Most of the Faqs is stuff I pulled together from internet, putting it here just making it easier for our members to find.

Starting with the basics here, some of use it & some don't. Power on demand, boost in a bottle & best bang for your buck.

Q: What are the advantages of using nitrous compared to other performance options?

A: Dollar for dollar, you can't buy more performance with less money then that of nitrous. Nitrous offers tremendous gains in torque without having to rev up the engine to excessive rpm's

Q: Can I simply bolt a nitrous kit onto my stock engine?

A: Yes. NOS manufactures systems for virtually any stock engine application. The key is to choose the correct kit for a given application.

Q: Will nitrous affect engine reliability? A: The key is choosing the correct H.P. for a given application. A kit that uses the correct factory calibration does not usually cause increased wear. As the energy released in the cylinder increased, so do the loads on the various components that must handle them. If the load increases exceed the ability of the components to handle them, added wear takes place. NOS kits are designed for use on demand only at wide open throttle. Nitrous can be extremely advantageous in that it is only used when you want it, not all the time.

Q: How does nitrous work?

A: Nitrous oxide is made up of two parts nitrogen and one part oxygen (36% oxygen by weight). During the combustion process in an engine, at about 572 degrees F., nitrous breaks down and releases oxygen. This extra oxygen creates additional power by allowing more fuel to be burned. Nitrogen acts to buffer, or dampen the increased cylinder pressures helping to control the combustion process. Nitrous also has a tremendous "inter cooling" effect by reducing intake charge temperatures by 60 to 75 degrees F.

Q: Will the use of nitrous oxide affect the catalytic converter?

A No. The increase in oxygen present in the exhaust may actually increase the efficiency of the converter. Since the use of nitrous is normally limited to 10-20 seconds of continuous use, there usually are no appreciable effects. Temperatures are typically will within acceptable standards.

Q: Which is the best position to mount a nitrous bottle?

A: NOS bottles cone with siphon tubes, and in order to maintain proper nitrous pickup, is important to mount the bottle correctly. We recommend mounting the bottle at a 15 degree angle with the valve end higher than the bottom of the bottle. The valve end of the bottle should point to the front of the vehicle and the valve knob and label should face straight up.

Q: How long can I hold the nitrous button down?

A: It is possible to hold the button down until the bottle is empty; however, 15 continuous seconds at a time, or less, is recommended.

Q: When is the best time to use nitrous? A: At wide open throttle only (unless a progressive controller is used). Due to the tremendous amount of increased torque, you will generally find best result, traction permitting, at early activation. Nitrous can be safely applied above 2,500 RPM under full throttle conditions.

Q: Is nitrous oxide flammable?

A: No. Nitrous oxide by itself is nonflammable. However, the oxygen present in nitrous oxide caused combustion of fuel to take place more rapidly.

Q: Will nitrous oxide cause detonation?

A: Not directly. Detonation is the result of to little fuel present during combustion (lean) or to low of an octane of fuel. Too much ignition advance also causes detonation. In general, most of our kits engineered for stock type engines will work well with premium type fuel and minimal decreases of ignition timing. In racing applications where higher compression ratios are used, resulting in higher cylinder pressures, a higher fuel octane must be used , as well as more ignition retard.

Continued
 

Types of nitrous systems.

These are three basic types of nitrous systems: dry, wet, and
direct port. The most misunderstood is the “dry” type of system.
A “dry” nitrous system simply means that the fuel required to
make additional power with nitrous will be introduced through
the fuel injectors (remember, fuel makes power, nitrous simply lets
you burn more of it). This keeps the upper intake dry of fuel. We
accomplish this by two methods. First, is to increase the pressure
to the injectors by applying nitrous pressure from the solenoid
assembly when the system is activated. This causes an increase in
fuel flow just like turning up the pressure on your garden hose
from 1/2 to full. The second way we can add the required fuel is
to increase the time the fuel injector stays on. This is accomplished
by changing what the computer sees, basically tricking the computer
into adding the required fuel. In either case, once the fuel
has been added, the nitrous can be introduced to burn the supplemental
fuel and generate additional power.
The second type of nitrous kit is the “wet” style of kit. These kits
include carburetor plate systems and add nitrous and fuel at the
same time and place (normally 3-4" ahead of the throttle body
for fuel injected applications or just under the carb as with plate
systems). This type of system will make the upper intake wet with
fuel. These systems are best used with intakes designed for wet
flow and turbo/supercharged applications.
The last type of system is the direct port system. Just as it’s name
implies, it introduces the nitrous and fuel directly into each intake
port on an engine. These systems will normally add the nitrous
and fuel together through a fogger nozzle or a NOSzle™. The
fogger nozzle mixes and meters the nitrous and fuel delivered to
each cylinder. This is the most powerful and one of the most accurate
type of systems. This is due to the placement of the nozzle in
each runner, as well as the ability to use more and higher capacity
solenoid valves. A direct port system will have a distribution
block and solenoid assembly which delivers the nitrous and fuel
to the nozzles by way of connecting tubes. Because each cylinder
has a specific nozzle and jetting (both nitrous and fuel), it is possible
to control the nitrous/fuel ratio for one cylinder without
changing that of the other cylinders. These systems are also one
of the more complicated systems when installation is considered,
as the intake must be drilled, tapped, and the “plumbing” made
to clear any existing obstructions. Because of this and the high
output of these systems, they are most often used on racing vehicles
built for the strain of such high horsepower levels.

"WET"
SYSTEM
Fuel and air mixture is distributed normally
through the factory electronic fuel injection
Nitrous and extra fuel are
injected into the air inlet
through a common nozzle

DIRECT PORT
SYSTEM
Fuel and air mixture is distributed normally
through the factory electronic fuel injection
Nitrous and extra fuel are injected into
the intake ports through individual nozzles
and jetted on a per-cylinder basis

"DRY"
SYSTEM
OEM Fuel Injection is "tricked" into supplying MORE fuel
to the engine, which compensates for nitrous
Nitrous Oxide only is
sprayed into the air intake
where it changes into a gas