Abstract
This work presents the results of spark ignition engine exhaust system optimization, performed using 1-D computer simulation model. The improvement of engine output has been achieved by variation of engine exhaust system geometrical parameters. The methodology for large amount of output data evaluation, as well as substantial criterion for optimal solution determination has been developed. Mutual interference of particular elements was investigated and used to improve the overall engine performance. Results are compared with a simplified acoustic model for resonance frequency and wavelength calculations.