02-13-2011, 10:51 PM
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#5 |
 Toyota Racing Development Join Date: Apr 2007
Posts: 5,038
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It's an acoustic modulation device. As valves open and close there are rebounding waves of air which pulsate back. These pulsations affect air velocity and density. Depending on how much air it's pressing back into the affect is different and the amplitude of the change varies. <--- going from memory on this, my memory of it is a bit rusty.
It activates at 4200RPM and around 70% throttle.
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