This is a bit nit picky, but I think your 4 cylinder engine probably draws two cylinders of air, 2 compressions, 2 combustions and 2 exhaust events per revolution rather than just one.

Rob,

 

Come on, cut it out!  I was wrong again.  I forgot that a piston goes up AND down during one revolution.  So, you are right again.

 

Now that changes the correction to the last email.

 

Finally:

 

For a 4 cylinder aircraft engine each 1/2 revolution has 1 cylinder drawing in air, 1 compressing air, 1 firing and 1 exhausting combustion products.  Thus, 1 revolution consumes 1/2 x 360 cubic inches or 180 ci or .0521cubic feet. At 2700 rpm and WOT, that's 2700 x .0521 cf or 282 cfm.  Lbs/Hr depends on air density.

 

I hope Angier's head isn't spinning by now.  At least the K&N calculation would have given him what he needed for sizing the filter.

 

Rob, please check this for any more errors.

 

Scott