Conclusion:

It was desired to improve the output of a 1977 Suzuki GS550 by redesign of its intake system alone. This was accomplished by the use of pulse-ram phenomena and low-restriction manifold design.  Although time constraints did not allow the production and testing of a prototype, the design team was able to generate projected output increases over the stock system. A maximum of 35% increase in torque and power was obtained.  In addition, a custom powerband was created for the operator’s most-used range of engine speeds.  By application of theoretical and experimental means, and employing optimization and computer simulation techniques, an effective high-performance intake system was designed which will revitalize this classic machine.  Perhaps more importantly, however, a design template was developed by which a similar system can be optimized for any four-stroke IC engine.