by WatchfulEye » Sat 14 Jul 2007, 14:45:43
No way to get 100 mpg simply by modifying the engine. Even a perfect '100% of Carnot efficiency' engine won't get such mileage in a typical mid-sized car.
Only way to get 100 mpg, is to make smaller cars with better aerodynamics, special tyres, etc. Although several manufacturers offer hybrid cars, part of the apparent fuel savings, come not from the tweaks to the powertrain, but from more attention to aerodynamics and tyres.
Scammers and deluded 'inventors' have come up with all manner of schemes to supposedly improve combustion in a gasoline engine, by atomising or vaporizing the fuel. As it is, the current technology of multi-point fuel injection is pretty much perfect. There is no room for improvement, at least for the fuel delivery system. After all, why do you think the car manufacturers are tinkering with ludicrously complex systems like variable valve timing and displacement - it's because all the low-hanging fruit in the engine bay has already gone.