|Nitrous Management Unit||1|
|24" Hose, -3AN, purple||2|
|3' Hose, -4AN, purple||1|
|18' Hose, -4AN, purple||1|
|1/8 NPT Bulkhead Fitting wi Nut||1|
|Ford Fuel Line Adapter||1|
|-4 AN to 118 NPT 90 deg. Fitting||1|
|101b. Nitrous Bottle wNalve||1|
|Bottle Bracket (short)||1|
|Bottle Bracket (long)||1|
|.024 N201 Fuel Jet||1|
|.028 N201 Fuel Jet||1|
|.032 N201 Fuel Jet||1|
|.035 N201 Fuel Jet||1|
|.040 N201 Fuel Jet||1|
|.046 N201 Fuel Jet||1|
|.054 N201 Fuel Jet||1|
|.067 N201 Fuel Jet||1|
|.083 N201 Fuel Jet||1|
|Power Point Arming Switch||1|
|Wire Harness w/Arming Switch||1|
|Aircraft Switch Cover||1|
|Red 18 GA. Wire||10 ft.|
|White 18 GA Wire||2 ft.|
|5/16- 18 Xl" Bolt for Bottle Brackets||4|
|5/16 - 18 Nut for Bottle Brackets||4|
|5116 Flat Washer||4|
|#8 x 1/2, Sheet Metal Screw||6|
|-4AN, 90 deg., Swivel Fitting||1|
|118-27 NPT Tap||1|
|TPS Resistor Wire||1|
All the power comes from the fuel, not the nitrous. Nitrous oxide is simply a tool that allows you to adjust how much and how quickly the engine bums the fuel. If the fuel isn't there, the power won't be either.
Avoid detonation at all times. Nitrous enhanced detonation is much more damaging than detonation that occurs when naturally-aspirated due to the increased amount of fuel available for releasing energy and the fact that more oxygen is present.
When system is activated, if something doesn't feel or sound right, BACK OFF. If you hear any detonation or feel anything unusual, get off the throttle. It's a lot easier to check everything over than it is to just try to drive through it and damage expensive parts. Don't activate or have the system activated when you hit the stock rev limiter. The stock rev limiter is a fuel cutoff. If you cut fuel while you're injecting nitrous, you're instantly very lean. This momentary lean condition has the potential of causing engine damage.
Spark plugs and nitrous performance: The factory spark plugs that come in the new Mustang GT are not suitable for use with any nitrous setting above 75 hp. Attempting to use the factory plugs at higher horsepower levels can produce a detonation condition after a few seconds of nitrous use. The solution to the problem is to install spark plugs that have a colder heat range and proper ground strap design for nitrous use. Consult your preferred spark plug manufacturer to ensure you install the correct spark plugs for the nitrous level you choose to run. Also, due to the cooler and denser inlet air charge that nitrous creates, it may be necessary to close-up your spark plug gaps to eliminate any misfiring.
In our experience, .030 to .035 in. spark plug gaps typically will ensure proper ignition. You may be able to run a wider gap, or you may have to close them up, just be aware of this if you start to experience an ignition misfire when you are using your nitrous system.
Engine modifications: The ZEXTM nitrous system, out of the box, is designed to work as a bolt-on kit for stock or mildly modified vehicles. Mildly modified vehicles would include header upgrades, exhaust upgrades, air filter kits, etc. If major engine modifications have been performed, a fuel pump upgrade will be required for safe nitrous system operation. Major engine modifications would include turbochargers, superchargers, aftermarket cylinder heads, head porting, camshafts, intake manifolds, etc. Failure to upgrade the fuel system when using nitrous in these highly modified applications may cause serious lean conditions that can result in severe engine damage.
Do not use Teflon sealing tape on any fittings in a ZEXTM nitrous system. It is easy for Teflon tape to get pulled into tne system, causin g blockages tnat can ultimately lead to incorrect nitrous system performance and potentially, engine damage. Only use liquid thread sealer for all NPT type fittings.
Do not use any thread sealing compound on AN style threads.
Do not attempt to start your engine if nitrous has been accidentally injected into the engine while it was not running. If this occurs, disable all eight of the ignition coils by unplugging the leads going to them. Push the accelerator pedal to wide open throttle and hold it there, push the clutch m, and wlth the throttle wide open, engage the starter and tum over the engine for several seonds to clear the nitrous from the engine. Failure to do this before attemptmg to restart the engme can lead to a dangerous intake system backfire.
Do not engage your nitrous system below 2500 rpm. This ensures that you will not have excessive cylinder pressures that could cause engine damage. When finished using your nitrous system, close the nitrous bottle valve and relieve the line pressure. This eliminates the possibility that nitrous could inadvertently accumulate in the intake manifold while the nitrous system is not being used.
Do not run excessive bottle pressures. Excessive bottle pressures, over 1 100 psi, are dangerous to your engine. Your ZEXTM nitrous system is calibrated and optimized to operate from 900- 1000 psi. Exceeding this will not improve performance. Over 1 100 psi also runs the danger of locking the nitrous solenoid closed due to excessive pressure working against the valve's plunger. If this happens, you must cool the nitrous bottle down to lower the pressure. This will allow the valve to operate properly again.
Start with the lowest horsepower setting and work your way up. This ensures if you have any tuning issues to work out on your vehicle, they will get sorted out with a smaller shot of nitrous that will be less likely to damage your engine. Once you have the car working well on the smaller shot, you can then safely start to step up your nitrous kit horsepower.
Make sure your vehicle has an adequate fuel supply. Nitrous systems put a large demand on your vehicle's fuel system. Make sure you have a large enough fuel pump to handle the demands of your engine, as well as the nitrous system.
How to adjust power levels: The ZEXTM Mustang GT Nitrous System is designed for multiple power levels. Metering jets installed in the nitrous nozzle control these power levels. To change the power output, all you need to do is install the appropriate set of jets. The correct combination of jets is listed on the tune-up sheet on the back of this instruction manual.
Engine computer modifications: Do not use any nitrous system if a non-nitrous custom tune has been programmed into your engine's computer. Custom computer tunes generally advance the ignition timing to optimize non-nitrous horsepower. If nitrous is injected while these non-nitrous tunes are loaded into your engine's computer, detonation will occur and this can lead to severe engine damage. It is important to only use computer tunes that have been specifically programmed for nitrous use.
Specific tunes for nitrous should have the ignition timing reduced, per the tune-up chart at the end of this instruction manual. It is generally recommended that you retard the ignition timing around 2 degrees for every 50 hp worth of nitrous used, based on an optimized ignition curve for your engine.
1. Decide where to put everything. Before you start to install the various components of this kit, you'll have to locate the best locations of each component by trial fitment and careful measurement. Remember, the stainless steel braided lines that connect the NMU to the nitrous nozzle are 24 inches long. Observe and mark the location on the air inlet tube where you would like to put the nitrous nozzle. The arming switch should be installed in a position convenient to the driver, but not in an area where it could be accidentally armed. Next, decide where and how you'll mount the nitrous supply bottle, check Fig. 1, 2, 3, and 5 for technical restrictions on bottle mounting locations and positions. In our experience, the passenger side of the trunk is an ideal location that has easy access under the vehicle for tightening the bottle bracket bolts. Finally, have a reputable perfonnance shop fill your nitrous bottle with automotive grade nitrous oxide before you begin. Do not overfill the nitrous bottle.