[Wayne Maybury]

Using the formula above, I would require a 103 sq. in. (358 X 6000)/20,839 but my filter is only 40 sq. in. (1.5" tall and 8.5" in diameter)

I am not familiar with this formula so I am now simply asking a question, not pointing a finger at anybody. Does this formula refer to the total area of the filter element or the apparent area? For example, my filter is only 40 sq.in. but if I cut it apart and open up the filter element, it will be much more.

I question this since I also measured the size of the bores of my Holley 750 DP. They are 1.6875" which gives me a total area available of about 9 sq.in. not even taking into account the area lost by the shafts and butterflies. If the carb can flow with 9 sq.in. why do I possibly need a 103 sq.in. filter? I realize that my small chrome filter is not ideal but using this formula it is totally inadequate.

Wayne