Interesting option, but really not required as both the factory and the "muscle" filter elements have enough flow to handle the engine, assuming an oiled gauze filter element a la K&N.
Per K&N's website, their particular filter medium flows 6.03 cfm per square inch. Measuring the muscle filter element I have, using the mean radius of 5.7"and subtracting .75" from the 2.25" filter height (as advised by K&N to factor in the rubber bonded edges) I get a total filter area of about 38 square inches, which times 6.03 gives about 230 cfm flow potential.
The engine's max airflow demand is about 183cfm. (engine cfm flow formula is cfm=Cubic Inches x RPM x Volumetric Efficiency ÷ 3456. I used 5500 rpm and .95%VE to get the cfm above. Could not find any specific data on the X-wedge VE% so used a reasonable estimate)
And from reading the forum, it appears few people rev beyond 5000 rpm so the typical engine cfm requirement is more like 165cfm.
So can't hurt to add the "deeper" filter element, but no point other than looks.
Last edited by Bitsobrits; 12/10/19 04:55 PM.
