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Old 05-17-2010, 09:11 AM   #12 (permalink)
Ryland
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Join Date: Jan 2008
Location: Western Wisconsin
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honda cb125 - '74 Honda CB 125 S1
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You asked about intake, intakes fallow the same rules as exhaust, not the exact same numbers to figure out the ideal size but the same basic rules, if this was not the case you would put your air cleaner right on your throttle body, if you do this you will get the least amount of "restriction" and your car will run poorly and installing a plate with some kind of restriction would not help, just like adding a clogged restricted air filter would not help "but my car needs restriction to run correctly!" is BS created by people who can't read and don't understand math.
Air has mass to it, when you have anything with mass moving it will want to keep moving, air entering your engine is moving in pulses, not a constant flow, your engine and intake are designed to work together in this area, putting to large of an intake on is going to have the same kind of affect as removing your intake altogether, that is part of the idea behind the VVTi, you have a runner for each intake valve and half of the runners are closing off completely at lower engine speeds.
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