So it'd have to be rated at 700 HP to get that mileage? One of the cool things about computers is that you could magically "detune" stuff..for instance, A/F ratios. IIRC you might have to shut down the car, but you wouldnt have to mess with anything after you install it and wont really half to work it anymore.

I can completely understand where you are coming from...after the 80s where most everything computer was KISS, suddenly there was all this new technology, meaning more weight and far less of a chance to easily swap in/out a better engine. I really like direct injection, but there are so many more variables with it over other modern engines that its true potential may take a few years to bloom.