[Barry_R]

Don't have the numbers in front of me - but the addition of the 14x3 air cleaner always cost a bit of power - maybe 10ish IIRC. The filter lid reduced that by a tiny bit. Once thing is certain - the lid did NOT cost the HP that was referenced when used in 600-750+ HP applications.

I don't hold much stock in published cfm ratings. In order to be an accurate measurement, a cfm rating much have a defined degree of pressure drop. Without a defined amount of restriction you cannot determine flow because you will not know whether you've reached a limit of any degree. Carbs are/were rated a 1.5 drop value - meaning the were a restriction on airflow at that cfm value. Every single EMC entry I have had has picked up power with a larger carb no matter what size the engine.