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Power Strokes
7.3 Aftermarket
Flow concerns regarding intake Plenums
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[QUOTE="Charles, post: 289580, member: 103"] To put things in perspective, experienced, professional engine builders agree that the intake plenum volume should be 1.5 to 2 times that of the engine displacement. For a 444 cubic inch engine, the low end for plenum volume would be 666 cubic inches at 1.5 times the engine displacement. If you made the plenum out of tube with a section width of 6 inches, it would need to be ~2 feet long in order to meet this requirement. That means a 6" diameter tube from the front to the back of the engine. That should sufficiently put things in perspective. [/QUOTE]
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