Optimum Intake Runner Calculation
By Bowling

Engine volumetric efficiency and power can be increased considerably by taking advantage of the natural dynamic effects which occur during the intake filling cycle. The kinetic energy of the resonant pulses can be harnessed to fill the engine cylinder at volumetric efficiencies up to 130%. When the intake valve closes, a pressure pulse "bounces" back of the intake tract and then in again towards the valve, and if timed properly, extra air can be "shoved" in. To use this pulse, the intake port must be the correct length, and only occurs during a narrow RPM band. The following calculation yields an simple, empirically-derived range of RPMs for a given intake runner length (mean). Second, third, and fouth order harmonics are provided.

Many Thanks to Mr. Bruce Bowling

About Hyatt Racing   Race Crew    Schedule     Pictures     Video Clips  

The Racer     Sponsors    Contact Info     Calculation Programs


© Copyright 1999 Hyatt Racing
and Tailboard.com

PersonalServers
Seriously Easy Internet WEB Hosting
©1999 S&J Ventures