From "vacuumandthegadgetmangroove.pdf":
Quote:
At TDC (Top Dead Center), the intake ari speed is at its slowest (zero). At this point, the Gadgetman Groove starts collecting air from the intake air stream (for the first 90 degrees of rotation). This causes the vacuum to spike. This spike in vacuum rips the fuel into vapor, ready to mix with the available oxygen, ready to become a much more volatile mixture.
Slamming the Mixture
When the piston passes the midpoint, it begins to slow. This causes a reaction inside the groove itself, and the ball of air that built up in the first part of the cycle is released into the intake passage to complete its journey to the piston. When it hits the intake valve, it has no where else to go and so expands explosievly, completing the blending precess with the available fuel vapor.
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If you actually managed to achieve this it would
decrease the efficiency of the engine, since what you actually want is for the pressure to be as high as possible for as long as possible, and only decrease (if needed) towards the end of the intake stroke, for the desired fill-rate.