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Alot of cars come OEM with variable valve timing these days. I actually don't think any of the MCs don't manufacture at least one VVT car(actually its the intelligent VVT(I-VTEC)).
My concern is not producing an engine that can run lean on any ole fuel. If that were the objective.... I would just go buy a diesel engine. My objective was develop an engine that could run straight gasoline and commonly available components at lean burn ratios to achieve greater FE. Also I have no concern for the ecological influences of the engine, only the economical ones. Those other fuels would be much more expensive to run than Iso-oct and water. Namely because water is pretty much free... and gas is cheap.
The concern at the time of its birth was to develop it in an inexpensive way(the system itself, not the very costly research and debugging phase). New fuel systems require new ECU mapping. What i proposed only required i lie to the ECU about some numbers.
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