Nitrous Express DIRECT PORT (NOZZLE SYSTEM) - Manual (Page 4)

COMPLETING AND TESTING THE SYSTEM
1. After all components have been assembled on the vehicle and each piece has been verified for correct installation and the wiring has been
rechecked and verified to be correct, it is time to test the system.
2. Do not open the bottle valve at this time.
3. Reconnect the negative battery cable.
4. Using the red, lighted toggle switch “Arm” the nitrous system.
5. Test the solenoid operation by “Engaging” the activation or WOT switch. All solenoids should “click “. If they do not recheck all wiring until
the problem is found and corrected.
6. Open the nitrous bottle and check all connections for leaks.
7. Start the engine and check for fuel leaks, correct any fuel leak problems before proceeding.
8. Adjust the fuel pressure regulator to the recom- mended pressure at this time. NX recommends using a Master Flo-Check (PN # 15519) or
the Master Flo-Check Pro (PN # 15529)
9. Do not purge the system into the motor i.e. Rev the engine and engage the system. Piston damage will result. The nitrous system should
only be engaged when the engine is at full throttle, under load, with the car in motion.
10. All NX systems are intended for off road use only and should only be used in that context.
11. Choose a suitable testing area, your local racetrack is best. Drive the vehicle to verify all operations are normal and the throttle linkage
is operating properly.
12. Pre-stage the vehicle, arm the system, purge the air from the supply line using 3 one-second bursts from the purge valve (PN 15600-
15601). Stage and launch th e vehicle, sh u t t i n g o f f at the 60ft mark. Check a l l components and v e ri fy t h e i r proper operation.
13. Repeat the staging procedure, the system should be crisp and responsive, make a full throttle pass and shut the engine off for an 8
spark plug check to verify each cylinder is getting equal amounts of N2O and fuel. The plugs should all look alike, having little or no
color. If they are sooty or black the fuel pressure must be reduced for optimum performance.
SAFETY TIPS
Do not attempt to start engine if nitrous has been accidentally injected while the engine was not running. Disconnect coil wire and turn motor
with throttle wide open for several revolutions before attempting to restart. If it is not possible to disable the ignition then the spark plugs must be
removed and the engine cleared of all nitrous before attempting to start engine.
1. Never permit oil, grease, or any other readily combustible substances to come into contact with nitrous cylinders, valves, solenoids, hoses and
fittings. Oil and certain gases (such as oxygen and nitrous oxide) may combine to produce a flammable condition.
2. Never interchange solenoids or other appliances used for one compressed gas with those used for another.
3. Identify the gas content by the label on the bottle before using. If the bottle is not identified to show the gas contained, return the bottle to the
supplier.
4. Do not deface or remove any markings, which are used for content identification.
5. Cylinder valves should be closed except when nitrous is actually being used.
6. Notify supplier of any condition, which might have permitted any foreign matter to enter the valve or bottle.
7. Never drop or violently strike the bottle
8. Keep valves closed on all empty bottles to prevent accidental contamination. Open the bottle valve for an instant to clear opening of any
possible dust or dirt before usage. Aim bottle outlet away from all body parts. Do not point it in the direction of a person.
POWER TUNING TIPS:
Nitrous oxide works well with all applications; 4 cycle, 2 cycle, diesel, and rotary engines. Each one has individual tuning characteristics, and
these tips apply generally to each one. Nitrous oxide is referred to as “Liquid Supercharging” because it, in effect, does the same thing as a
mechanical supercharger, forcing more fuel and oxygen into each cylinder, thus producing more power. The biggest enemy of all supercharged,
turbo charged and nitrous injected engines is “DETONATION”. The use of higher-octane fuel, and or a combination of better fuel and timing
retard can control this. Remember detonation is a spark plug, head gasket and engine “KILLER”.
1. Your engine should be tuned to its maximum power prior to nitrous usage.
2. The ignition is an integral part of the nitrous system and must be able to ignite the mixture under very high cylinder pressures. The hotter the
spark the better!
3. In stock engine applications and street usage the spark plugs should be at least 2 steps colder than stock. Do not use platinum tip, extended tip
or any plug with multiple ground straps or split ground straps. When in doubt about heat range always go one step colder. A spark plug that is
to “Hot” will cause detonation, burned plugs, poor performance, and engine damage. In competition engines always use the coldest plug avail-
able. Never use an extended tip plug in a racing engine.
4. We recommend 1-2 degrees timing retard for each 50 horsepower boost as a starting point. Your engine may need more or less depending on
your combination.
5. Your fuel system is also an integral part of the nitrous system, be sure it is in top shape and all filters are clean.
6. Engine operating temperature should be between 160 and 200 degrees prior to nitrous usage.
7. Never “lug” your engine and hit the nitrous system, use the system at wide-open throttle only, nitrous should not be used below 3000 rpm’s. If
you do any of the above a serious “Back Fire” could result in engine damage.
8. The better the exhaust system the better the nitrous system will work.
9. Do not attempt to drill or alter the jets, solenoids, or the tubes in the nitrous plate. These items are engineered to their maximum capability.
Any modification you can make will decrease power and destroy engine parts.