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the turbo *can* save gas. reason being: its more efficient of a compresser than the pistons. meaning the turbo takes less energy to compress the same amount of air than a piston would. the problem is you still have pistons compressing air, so you dont get much benefit. miller cycle engines use this to their advantage (albeit typically with a supercharger rather than a turbo) by using the supercharger to pressurize the air, and leaving the intake valves open for most of the intake stroke of the engine. the benefit is around 50% better mileage and 25% more hp or something like that. mazda tried it in the millenia sedan, but didnt follow through after releasing it so its popularity died after a few yeas.
as for the tornado...BS. too many things in the way...like the throttle body (which totally destroys anything it does) and the change in vectors and velocities of the air as it passes through the intake plenum and manifold.
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'90 Cressida, 7M-GE, M5 (2JZGE-T coming)
'91 Toyota Pickup, 22R-E, M5
'90 Suzuki VX800
"You don't get to judge me for how I fix what you break"
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