Zex Blackout Nitrous System Installation

With the battery disconnected, we relieved the fuel system pressure and removed the fitting off the fuel port on the fuel feed tube.

The kit comes with an adapter fitting to replace the stock fitting.....

....It must be prepped with a liquid thread sealant-not thread tape-and tightened. The fuel feed hose then attaches to it.

Zex also sent us a purge solenoid kit (PN 82010). It retails for $115.45 and is easily installed with the provided hardware.....

....We mounted it to the frame-rail on the right front, near where we mounted the controller box.

After mounting the purge solenoid, we attached the ground wires (one for the purge solenoid and one for the controller box) to the body with the hardware provided. We decided to ground them together as a fail-safe. If there is a bad ground, the system will not purge, giving the driver a hint that something is wrong ahead of time.

A Y-fitting comes with the purge kit, and is installed between the nitrous feed line and the controller box.

A hole must be drilled and tapped (the tap is even included) to mount the nozzle

The white wire on the controller box must be attached to the TPS signal wire. You can use a voltmeter to find out which wire is the signal wire by turning the key to On (with the engine off) and having someone depress the accelerator pedal slowly. WOT is usually around 5 volts.

Since our rear window defogger has been out of order for quite some time, we used that switch as the arming switch. It is protected by a fuse and is activated by a relay. It's easier, however, to just use the switch provided in the kit. We just want to be sneaky.

We hid the purge switch in the ashtray.

With the nozzle in the intake inlet tube, we installed the pills for a 125 shot and headed to Ramsey's Performance in Lutz, Florida.

After making a few pulls on the dyno, Ramsey found that our coupe was happiest with 14 degrees of timing with the 125 shot. The air/fuel ratio was a safe 12.0-12.5, and it made 344 rwhp and 361 lb-ft of torque. Without the juice, it made 257 rwhp and 277 lb-ft. So the 125 shot produced over 86 rwhp and 84 lb-ft of torque, and even caused a little tire spin on the dyno (arrow).

At the track, we made a few baseline runs without the nitrous, which yielded a 12.72 at 104 mph and a 12.81 at 103 mph. On the juice, we had a hard time hooking up at first. Coming out of the hole on the spray was a little much for the stock-style suspension, so we tried a less aggressive launch method. The result was an impressive 11.79 at 115 mph. A backup run produced 11.93 at 114 mph. We dropped almost a second off e.t.'s with a few hours of work and less than $1,000.

Dennis Ramsey (Ramsey's Performance) used a timing....

....light and a half-inch wrench to adjust our timing.