Clear Nitrous Lines After Use:
Close bottle valve. Use purge kit to relieve line pressure or open line
fitting to let nitrous bleed off.
Do not use Teflon sealing tape on any fittings in a ZEX Nitrous System:
It is easy for Teflon
tape to get pulled into the system, causing blockages that 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:
Disable the ignition and, with the throttle wide open, turn over the engine for
several seconds to clear the nitrous from the engine. Failure to do this before restarting the engine 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 1100 psi, are dangerous to
your engine. Your ZEX nitrous system is calibrated and optimized to operate from 900-1000 psi. Exceeding
this will not improve performance. Over 1100 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 ZEX 4 Cylinder Direct Port Nitrous System is designed for multiple
power levels. Metering jets installed in the nitrous injectors and distribution blocks control these power levels.
To change the power output, all you need to do is install the appropriate set of jets. The ZEX direct port system
uses a unique dual stage jetting system. There is a jet in the distribution block that adjusts the power levels and a
second jet in each of the nitrous nozzles that allows the tuner to further trim nitrous and fuel for individual
cylinders. The correct combination of jets is listed on the tune-up sheet on the back of this instruction manual.
