1999 Honda Civic Vortech Supercharged

The world of forced induction is generally divided between supercharger and turbocharger advocates. While both platforms increase horsepower by compressing air, the main difference is in the route taken to achieve compression. While the turbocharger utilizes wasted exhaust gas to spin the turbine, the supercharger creates power from the use of belts and pulleys linked to a gear drive.

While three current styles of superchargers exist (centrifugal, roots and twin screw), the most popular version would have to be the centrifugal type. The centrifugal supercharger provides airflow proportional to engine rpm, thus providing higher boost with higher rpm. The compressor side of the unit, which holds a resemblance to a turbo housing, can help identify the centrifugal supercharger. The "snail," as many have come to know it, houses a compressor wheel that is attached to a gear drive on the opposite side. The supercharger is a great way to add instant power that lacks the lag that can be associated with turbocharging.

The Inner Workings
With this in mind, let's take a look underneath the hood of this Vortech Honda Civic Si. Inside, you will find this 1999 Honda sports a Vortech Supercharger kit that utilizes the V-5 G-trim supercharger. The unit, which is capable of producing 575 hp, features a patented air assist oil drain back valve, which bleeds a small amount of oil as it enters the charger. This routine act helps increase mechanical efficiency by reducing the amount of friction in the supercharger, adding longevity and increased performance.

Feeding the supercharger with fresh air is a K&N air filter that is linked to a molded plastic pipe. The pipe holds the filter behind the front bumper to provide the coolest air possible. Prior to entering the intake, all air is chilled by a Power Cooler air-to-water aftercooler. Aftercoolers have been known to drop air temperature by 200-degrees Fahrenheit with minimal pressure drop, thus resulting in higher boost, more timing and a smaller chance of engine damage from detonation. Additional safety and "sound" features include a Vortech Maxflow by-pass valve. The valve helps protect against compressor surge, while supplying "shift farts" with each shift to the next gear.