Air Flow - Intake Filter Specifications
Air Flow - Intake Filter Specifications
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1,225 posts

271 months

Saturday 26th January 2008
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Hi Folks!

Have you ever wondered how to determine how much air your engine uses? Well, I was talking with K&N Engineering yesterday and was able to extract the formulae for engine air requirements and their filter flows. Here's a simple spreadsheet that performs the calculations.

There may be other calculations for other manufacturers. These are specific to K&N conical and cylindrical elements. I believe it works out the 6 cubic feet per minute per square inch.