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328 e46 exhaust valve
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<blockquote data-quote="pussy" data-source="post: 422344" data-attributes="member: 60"><p>very simple theory here...</p><p> </p><p>if the back pressure is high, meaning the gas is restricted, you will have more torque cos of the back pressure helps on the mid range(this is good for autocars).. the flap stays closed under a certain rpm within the vacuum set by the bmw engineers to aid a less back pressure to have a more power hp to move the car faster, flap opens..it's where the max torque achieved and hp moves up till 5600rpm(i think)..</p><p> </p><p>it's like the smaller diameter straw and a larger diameter ones..</p></blockquote><p></p>
[QUOTE="pussy, post: 422344, member: 60"] very simple theory here... if the back pressure is high, meaning the gas is restricted, you will have more torque cos of the back pressure helps on the mid range(this is good for autocars).. the flap stays closed under a certain rpm within the vacuum set by the bmw engineers to aid a less back pressure to have a more power hp to move the car faster, flap opens..it's where the max torque achieved and hp moves up till 5600rpm(i think).. it's like the smaller diameter straw and a larger diameter ones.. [/QUOTE]
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