Not many years ago, fuel systems from one car manufacturer to another were virtually standardized. That’s because most pre-2005 engine fuel systems possessed the same (or similar) fuel pressure and most had similar air induction systems. That meant that anyone adding a nitrous system to an engine could rely on nitrous systems being more-or-less one size fits all.
However, within the last three to five years, engine fuel system rules have changed. New technology, such as return-less style fuel pumps and throttle-by-wire controlled engines, has opened up fuel system design to the extent that engineers are designing more efficient fuel systems tailored to a new generation of engines.
That fact has led to the development of new nitrous oxide systems, as well, because early nitrous kits don’t provide optimum performance with these new fuel system designs. These changes did not escape the attention of engineers at ZEX who responded with the development of nitrous kits tailored specifically to the new generation of Ford, Chevrolet and Chrysler EFI engines. Each new nitrous system is created to provide optimum performance and engine safety.
In the case of the 2005 and newer Chrysler Charger and Magnum Hemi engines, there wasn’t an existing nitrous system that would function well. This engine has a unique speed density style computer control, a return-less style fuel system as well as higher fuel pressure of around 58 psi that requires a radically different nitrous system tune-up for safe and efficient power gains.
ZEX engineers went to work and developed a direct-fit EFI Charger/Magnum kit that safely delivers 75-125 horsepower. The kit provides an accurate tune-up, substantial power and safe air/fuel ratios. However, developing this compatible nitrous system required solutions to several obstacles.
Overcoming Obstacles
One of the first challenges was the need for an efficient and practical fuel connection for the nitrous system because the fuel lines of the new Hemi engine are manufactured from rigid plastics and are not receptive to modification. The solution was to develop a direct-fit fuel rail adapter that easily snaps in place and has a fuel tap built in.
Another issue was the fact that this Hemi engine is a throttle-by-wire design, which poses nitrous system activation issues. However, the ZEX system includes patented technology that uses the engine’s throttle position sensor to activate the nitrous system at wide open throttle. This provides perfect integration of the nitrous system to the Hemi engine’s electronics.
From a safety standpoint, the ZEX system uses advanced safety technology called Active Fuel Control. This exclusive patented technology monitors the nitrous bottle pressure and adjusts the kit’s fuel enrichment so the system is never too rich or lean.
All of this means that the new ZEX Nitrous System for the EFI Hemi-powered Charger/Magnum is an advanced system that safely provides incredible power. Best of all, it’s a plug and play system that can be installed in two hours from start to finish.
Installation of the ZEX Nitrous System is a straightforward process; however, you must make sure you follow the instructions. Take a look at the following overview to see the ZEX system’s process of installation in a 2007 Dodge Charger SRT8.
1 Deciding where to place the nitrous tank is the first step in installing a nitrous system. The best location for the tank in this 2007 Charger is in the trunk just behind the rear seats. 
2 Routing the nitrous line comes next. In this photo, the line is routed between the trunk floor, just behind the rear seats, under the car and then exits into the engine compartment. The nitrous line will be connected to the nitrous management system unit. 
3 Placing the nitrous activation switch is the third step. The switch will be mounted in the passenger compartment in an easy to reach location for the user. The switch (shown here) is an on and off toggle style with a safety cover to prevent inadvertent nitrous system operation and requires a 12-volt power source. 
4 The next step is mounting the nitrous management unit in the engine compartment. In this example an area next to the electronic fuse unit has been chosen because there is sufficient room for the nitrous and fuel lines to be attached and routed to the necessary locations. This location also provides good access for the electric wiring to be accomplished. As shown here, the unit has three colored wires: red is the power (12-volt) wire, white connects to the throttle position sensor, and black is the ground wire. When all the components are mounted, the system will be wired; specific connection instructions are included with the system. 
5 Connecting the fuel line requires the removal of the original equipment (OE) fuel line from the fuel rail as indicated here. 
6 The OE fuel line is replaced with the custom designed fuel line tap assembly shown here. 
7 The fuel line tap assembly is an exclusive and unique part of the ZEX Nitrous System. 
8 The final component mounted is the nitrous nozzle. The nozzle is installed by drilling and tapping an opening in the air inlet tube with the NPT tap included in the kit. 
9 The nitrous nozzle will be placed at this location of the air intake system.
Linear Mode
