Quote:
Originally Posted by serialk11r
Actually, I think OEMs typically put everything into emissions and spread it out thin everywhere else, because emissions regulations are really really hard to hit :P Emissions compliance ruins just about everything else, although we have it to thank for electronic fuel injection (that's about it).
A tune can't really decrease fuel economy because cars run really rich from the factory to protect cats.
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This.
Automakers are very constrained by emissions they have to clear those targets first, then power, fuel economy etc....come after. want proof? Look how European cars with turbo DI engines can't run in lean burn mode due to US emissions issues over nitrate emissions. If economy was priority #1 they'd say screw that.
Tuners have plenty to play with once you through emissions out the window.