Improving Exhaust Header Performance with Multiple Response Surface Methods

Todd Dvorak; Robert Hoekstra; Julia Pet-Armacost

doi:10.4271/2003-01-1389

2003-03-03

Improving Exhaust Header Performance with Multiple Response Surface Methods 2003-01-1389

The purpose of this study was to increase IC engine performance by “tuning” the exhaust system to different induction system pressures using an empirical based modeling approach. The two distinct induction pressures are atmospheric and 13-15 mmHg above atmospheric. The above atmospheric induction pressure occurs when the race car is in the lead; the atmospheric pressure occurs with the race car is following the lead or “in the draft.”

Since it is ideal to achieve optimum performance for both induction pressures, the problem was formulated and optimized using an empirical Multiple Response Surface Method (MRSM) approach. MRSM is a process that “extracts” multiple objective performance information through carefully controlled experiments and data modeling techniques. An analysis of the experimental data will identify the ideal header length configuration that maximizes performance for both induction pressure extremes.

This paper discusses how the MRSM method was applied to optimize the header length for a 5.7 Liter Restrictor Plate - IC engine system for both induction system pressure extremes. The results of the study indicate that the empirical modeling approach is a viable, robust, and efficient method of performance optimization.

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Improving Exhaust Header Performance with Multiple Response Surface Methods 2003-01-1389

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