Quote:
Originally Posted by racprops
swirl port heads
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Contrary to popular belief, swirls are bad for fuel mileage. All they do is fling the gasoline out of the air causing separation of fuel and air, the exact oposite of what we think they do.
It's much more effective to blast the mix past a sharp edge (sharp edges in a combustion chamber are also contrary to popular belief). The air has to bend quickly but the fuel that collected on the walls shoots into the turning air causing it to atomize.