« Reply #5 on: September 08, 2012, 05:12:22 pm »
if the runners are divided, its a true cyclone. it will need to be actuated some how, either vacuum or figure out something with a solenoid.
I'm not sure that the cyclone actually has more flow on a high power car, due to the loss of volume in the runners, but on a lower powered car, it will definately help with torque.
Guys in the Mazdaspeed community routinely delete the variable runners to free up that blockage in the runners when building bigger power engines. But, if you do it has to be on a fairly well tuned car as you will loose some torque.
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