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I would say that the OEM engine tune is sufficiently developed to be as lean as possible relative to the fuel octane. And so improve fuel economy by increasing the tire pressure. Also, shorter sidewall tires are possible. For instance a 205/50-15 tire and a 205/45-16 tire have about the same diameter and width but the 205/45-16 tire has a shorter sidewall. ...


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It is very unlikely that a chip tuning, almost every time developed by small companies, can surpass the factory tuning, considering that: tuning requires controlling at least 10 parameters (in the last 10-15 years, more nowadays) in a range of rpm which should be split in several points, let's say 5-10 from minimum to max rpm. If you do the math, we are ...


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