According to Joe Soucheray of the Garage Logic radio show you mentioned, to count towards your C.I., they have to be internal combustion cylinders, so air complressors don't count.
OK, here we go! 7.3 diesel,6.0 ford diesel,5.9 cummins on the floor, 4 cyl. ford new holland diesel, 325 chevy , 6 cyl. nissan, 4 cyl. saturn, 29hp JD diesel, 23hp kubota diesel,16hp koehler,weed wacker,chain saw,suzuki 400 atv,sleds (4) cat 500,600,700, yamaha 4 stroke. boats, twin 305 chevy,twin 525 merc with b&m blowers. You can never have too much stuff.