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Ernie Mena of Westech Performance Group in Mira Loma, California, is an expert at tuning cars on the chassis dyno. After a let's-get-acquainted baseline test, Mena began his tuning loop by addressing the primary-side fueling. A wideband oxygen sensor installed in our Dr. Gas X-pipe fed a data stream to the SuperFlow dyno, allowing Mena to zero in on problem areas. View Related Article
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