olddman
Well-Known Member
Just wondering if there is any difference in performance or air flow between an original equipment 10 inch un silenced air cleaner for a 1965 four barrel 273 and using an after market air cleaner, say a K&N?
Depends on power level. You can pretty easily start to out flow a stock un-silenced air cleaner. Stock they have about 3/4” gap at the bottom multiply that by the circumference of the air cleaner and it doesn’t add up to much. I think a stock 340 diameter is 12”? 12”x3/4”=a whopping 9 square inches!! Open 3” tall air cleaner. 3”x12”=36 inches...
Not sure about 273, but I would be surprised if the gap was an inch on a 340. My fat, but not sausage finger doesn’t fit in the gap.