Discussion in 'Forced Induction' started by Moonlight Illusion, Apr 11, 2003.
What the hell are velocity stacks?
Velocity stacks can be 2 things... you see air cleaners on domestics, that extend into the air to grab more air with a filter on top or you have something like the Hilborn fuel injection stacks, they dont have a filter on any of the 8 "tubes", but they still extend up in the air to grab cooler air then what is down by the motor.
Here is the "air cleaner/intake" version.
Here is the ramtube/stack from the Hilborn Injection kits.
the commericals you see watching TNN's "hunting will billy-jo-bob"
at least that's the tornado thingy....
claim to make 50+ hp. waste of money.
Velocity stacks are REAL power adding modifications.
They are the horn shaped inlets you see on professional drag cars, and stock honda's use a curved velocity stack in the making of their intake manifolds for the high performance engines <ITR manifold, B16a, etc>
It's basicall a venturi that has a very smooth transition, tunes to certain resonances, to allow air to flow VERY quickly into an orifice like a head port.
Tornado's are crap. They claim that swirling the intake air makes it move faster, easier, like water out of a coke bottle. HELLO, PEOPLE. Water swirling out of a bottle goes faster becasue the air goes in at the same time as the water flowing out without needing to have bubbles backing up flow while they are sucked in because of backed up pressure in the bottle. DUH.
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