The correct term—although a lot less sexy—is a “cold air induction system.” There is a difference; let’s break it down.
For engineers, true “ram air” occurs when the air entering directly into the fuel metering system travels fast enough that a mild supercharging effect occurs—a boost gauge would show a few pounds of positive air pressure on a normally-aspirated engine if it actually experiences a ram-air effect. The operative term here is “fast enough”: Ram air only becomes effective at high speed, providing about 1.2% horsepower improvement at 100 mph, 2.7% at 150 mph, and 4.8% at 200 mph.
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Esta historia es de la edición April 2020 de Hot Rod.
Comience su prueba gratuita de Magzter GOLD de 7 días para acceder a miles de historias premium seleccionadas y a más de 9,000 revistas y periódicos.
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What Is Pro Street?
You know it when you see it.
Pro Street in Pure Vision
Builder Steve Strope weighs in on the Pro Street look and what he would build today.
THE GAS ERA LIVES ON
These vintage race cars chart the evolution of technology in the early days of drag racing.
MOTOR HEAD FOR LIFE
Scott Sullivan is one of the original Pro Street pioneers. He still builds cars today out of a small shop in Dayton, Ohio.
BRINGING BACK PRO STREET!
David Freiburger and Roadkill Garage built a Pro Street Nova.
SWEET ASPIRATIONS
Jerry and Matthew Sweet added an 800ci Pro Stock mountain motor to chase HOT ROD Drag Week's Pro Street NA Record.
Making Bad Decisions Badder
Bradley Gray's 1970 Nova is a Hybrid! It's a streetable Funny Car.
ART PROJECT
This Rad Rides by Troy-built '63 split-window Corvette went from restaurant prop to ripping up the street!
WHERE DO WE GO FROM HERE?
THE PRO STREET ERA PEAKED IN THE '80S. ARE WE IN THE BEGINNING OF A RESURGENCE?
Making Connections
Project T-top Coupe: We install a Terminator X Max for big power.