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And the Miller cycle existed before Toyota's version, which is just the Miller cycle without a supercharger.
And to say that VVT or the Atkinson/Budack cycle is worthless on a racing engine is oversimplifying things. DFI is pretty much useless at full load for fuel economy or performance gains, and even at the slowest tracks you're still going to spend a majority of the time at or near full throttle. But everyone in racing is now running DFI, something that Audi did over 15 years ago but didn't catch on until recent years in racing.
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