SideXSide Action - November 2007 - (Page 60) POWER UP Story & Photos: Stephen Clark NITROUS CHARGED RHINO 660 Nitrous oxide has been used by drag racers for years to achieve maximum horsepower out of an internal combustion engine. But in most cases there is a trade-off between the power it achieves and the strain put on the motor. The reason for this is that injecting nitrous oxide increases the amount of oxygen going into the motor and will lean out the fuel mixture unless additional fuel is added to compensate. Every tuner knows that running too lean can get ugly real quick, typically in the form of holes in pistons or cylinders. So to prevent over lean running conditions, additional fuel must be added when injecting significant amounts of nitrous. Most nitrous kits are either dry or wet; a dry nitrous kit requires jetting the carb richer and a wet kit injects fuel through an auxiliary fuel injector. Both styles have their pros and cons. The dry kits are simpler and cheaper but will either run too lean on the nitrous or to rich when not on nitrous. Wet kits are great for absolute power gains but are more complicated to install and expensive. injected, pressure is put on the carburetor float bowl which forces more fuel into the engine. So there is a consistent nitrous to fuel mixture being injected, no matter what the differences are in nitrous bottle pressure. Boondocker’s damp design combines the simplicity of a dry kit with the performance gains of a wet kit. To find out more about the Boondocker system, we visited their facility in Idaho Falls to witness the installation of their kit on a 2006 Yamaha Rhino 660 4x4. The Rhino was stock, except for an Innovate air/fuel gauge and a K&N cotton gauze filter. 60 Boondocker has combined the best of both wet and dry styles with their nitrous kit. So it is not wet and not dry – damp, maybe? The Boondocker kit uses a proprietary manifold design that injects nitrous into the air intake before the carburetor. The manifold has a hollow plastic stem that picks up nitrous pressure. The manifold is connected with tubing to the carburetor float bowl vent lines. When nitrous is www.sidexsideaction.com The Boondocker kit for the Rhino comes with a bottle, manifold, solenoid, switches, all lines, switches, brackets, and hardware needed to install the kit. http://www.sidexsideaction.com
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