Quote: How about running a bigger filter with a drop base? Is that really helping or is the drop base causing other issues worse than a smaller filter?
I agree with Mr P Body - it depends It depends on whether there is enough area to begin with, whether the top is too close to the bowl vents, and the shape of the base.
My observation from stuff I've bought is that some drop bases have a very steep slope just inside the aircleaner. Others are a lot smoother.
Same with the tops. I was using a K&N filter top, but internally it was pinching the gap to the drop base. Externally, it was placing the retaining rod and nut very close to the hood. I switched to a nicely shaped spun aluminum top and picked up room both inside the aircleaner and hood clearance. So now I can run a taller cleaner or add 1/2" more carb spacer if I need.
Someplace I've seen a rough calculation of filter area for cfm, I just can't recall where right now.
