Can {CALC.CYLAIR} be used in place of {GM.DYNCYLAIR_DMA}?

Is {GM.INJFLOW} derived from the IFR table {B4001}?
Can a calc_pid be used in place of it, something based off fuel pressure?

It would be nice to be able to log more PIDs w/the RR.
I wonder if it's possible to log directly from the RR.