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Originally Posted by JSH
Direct injection is required for emissions, performance and fuel economy.
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Yet sometimes an "outdated" port-injection engine, even though not likely to outperform a counterpart fitted with direct injection, may actually result in a higher fuel economy and lower NOx emissions. Performance-wise, McLaren and Koenigsegg have been doing a great job with port-injection while most of the competition switched to direct injection.
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You get much better control injecting directly into the cylinder then the intake manifold.
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Direct injection has its advantages, yet port-injection remains cost-effective for some applications.
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If direct injection wasn't a benefit OEMs wouldn't spend the extra money to fit it.
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Had either that Freevalve system or something analogue been widespread, it would be the end of direct injection on gassers. And even for flexfuels, there are easily-implemented cold starting aids.