Have a tech problem? Don’t throw a fitting; make the connection to Pit Stop and I’ll answer your questions with flare. You can reach me via conventional mail, e-mail, or fax. Snail Mail: HOT ROD Pit Stop, 6420 Wilshire Blvd., Los Angeles, CA 90048E-Mail: [email protected]; don’t forget to put your real name (not screen name) and hometown in the message bodyFax: 323/782-2223 Roots On A Cleveland The basic rotor, or positive-displacement supercharger, was invented in the mid-1800s by the Roots brothers (that’s why it’s referred to as a “Roots” supercharger). “Positive displacement” means that with each full rotation of the compressor element, a specific fixed volume of air is pumped from the inlet side to the exhaust outlet. A Roots blower utilizes dual intermeshing rotors inside a case bolted atop a special intake manifold. A crank pulley spins a drive pulley via a belt (cogged on larger blowers); the drive pulley in turn connects to meshed gears that spin the rotors. As the rotors spin, they compress air and fuel supplied by carburetors or a fuel-injection system mounted on top of the blower case. Positive-displacement superchargers build boost pressure down low and maintain it as rpm increases, but efficiency tapers… Read full this story
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