Air Cleaner Question

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. At 410 CI around 400 hp it started to become an issue for me. My AFR’s at higher rpm would fluctuate wildly. I skeletonized the base in the angled area, not the horizontal area where it enters the carb. Smooth transition is very important. They are now rock steady up to as high as I have the guts to rev it. Across all the makes stock air cleaners become problems in FAST. Even the big Hemi ones. They just were not designed to flow 500+ CI at 8,000+ rpm.