What's more impressive in head design is a technology pioneered by Mercedes Benz back in the 60's. Electronic valving. Using an electronic system to open and close valves instead of a mechanical system.
The potential for this type of technology is huge! Can you imagine the benefits of having a computer open and close the valves without any mechanical drivetrain? Huge low end torque, coupled with extreme high rpm horsepower? A computer controlled valve system would make a mockery of VTECH and the current 4.6 DOHC motors varible systems. The drawback? Reliability.
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