Owners Manual

Sport Compact Nitrous System (Direct Port Design)

Pro Race Fogger 4 cyl. systems w/stainless annular nozzles

Powerful Direct Port System For 4-Cylinder Engines
The NOS Pro Race Fogger? system represents the ultimate in state-of-the-art direct-port nitrous injection technology. Simply stated. it produces the largest horsepower gains of any single stage nitrous system available today and is designed For all-out competition-only import four cylinder and rotary engines. Several top-running ?Pro? Imports have recorded 7-second clockings with this system. The primary benefit of port injection is that fuel and nitrous are introduced into the intake tract of each cylinder individually and can be jetted to provide the optimum fuel/nitrous charge For each particular cylinder. And. because 0f the cool. dense ?foe? like charge of atomized fuel and nitrous. it will produce optimum power. Some of the key components in this system are a Super Hi-Flo bottle valve. Pro Race solenoids (the highest flowing available) Y-shaped distribution blocks. stainless steel lines and your choice of Soft Plume 9Q0 or Annular Discharge stainless steel nozzles. They are adjustable to produce power gains from 80 to well over 225 hp!
The Pro Race Fogger? system for Imports is offered in kit form. and it can also be installed on your manifold by the experts at Nitrous Supply.

These systems utilize the best flowing solenoid on the planet the exclusive R-series from NOS with a high-lift plunger. ported passages. a direct flow path and very low current draw.

System Requirements
The Pro Race Fogger system is designed for use with competition race engines only.

Carbureted applications:
Use a fuel pump designed to operate between 5 and 10 psi with a flow rate of 0.1 (gph) gallons per hour per horsepower at 6 psi. Please note that most aftermarket pumps ore rated under free flowing conditions. At 6 psi their flow rates may be greatly reduced. Check the manufacturer?s specifications carefully or have the pump checked before you use it.

Fuel Injected applications:
Use fuel pump(s) that flows at least 0.1 (gph) gallons per hour per horsepower at system pressure. For example at 42 psi flowing. an engine that makes 450 hp while the nitrous system is activated will require at least 45 gph at 42 psi flowing while going down the track without experiencing any pressure loss. Please note that most after-market pumps are rated under free flowing conditions. At system pressure their flow rates may be greatly reduced. Check the manufacturer?s specifications carefully or have the pump checked before you use it.
Due to the high power levels and cylinder pressures produced by Pro Race Fogger systems. you must use high strength forged pistons. rods and crankshaft. Use of cylinder head and main studs will help insure reliability A high quality racing ignition system with timing control must be used with these systems. Use of racing gas is recommended.