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The BMW Range
5 Series
E60, E61
Quad Exhaust + CCC
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<blockquote data-quote="turbology" data-source="post: 313316" data-attributes="member: 10223"><p>In paper, the best exhaust configuration should be 1 exhaust pipe per bank.</p><p>Diamater should based on displacement and lenght of exhaust.</p><p></p><p>Contradictory to most believe, (I am into "new school" theory), a good car exhaust do NOT need any back pressure.</p><p>Is all based on 2 Vs, velocity & volume.</p><p>Exhaust that is too big lost velocity, thus losing power.</p><p>Exhaust that is too big lost volume, thus no power.</p><p></p><p>Since BMW I6 is 6-2-1 configuration, I will go for 2.75" exhaust for a 2.5L engine.</p><p>Slicing the exhaust into double or quad will just create more turbulence, thus less ideal. (although it look cool)</p><p></p><p>Cheers <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="turbology, post: 313316, member: 10223"] In paper, the best exhaust configuration should be 1 exhaust pipe per bank. Diamater should based on displacement and lenght of exhaust. Contradictory to most believe, (I am into "new school" theory), a good car exhaust do NOT need any back pressure. Is all based on 2 Vs, velocity & volume. Exhaust that is too big lost velocity, thus losing power. Exhaust that is too big lost volume, thus no power. Since BMW I6 is 6-2-1 configuration, I will go for 2.75" exhaust for a 2.5L engine. Slicing the exhaust into double or quad will just create more turbulence, thus less ideal. (although it look cool) Cheers :) [/QUOTE]
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Quad Exhaust + CCC
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