Porter Cable FC350A Manuel D'instructions page 16

Compressor will be sufficient for tools at all production rates.
Compressor will be sufficient at slow or moderate production rates,
but may have difficulty at very rapid rates.
Compressor will be adequate only when tools are utilized at slow
production rates (punch-out or occasional use).
not recommended
NR
Portable
Handcarry
3.2 – 4 CFM
1
2
3
4
NR
5
NR
6
NR
7
NR
8+
NR
5.5 HP Gas 8 HP Gas
2 HP Elec.
14 – 16 CFM
8 – 9 CFM
NR
NR
NR
16 - ENG
Industrial
23+ CFM