I have this setup in my van with a raptor and prochem commanche joined together with a Y piece.
Both have 2x3 stage vacs (Commanche has been upgraded from 2x2 stage).
Great power and with the heat from the raptor I find it a great setup.
Commanche always fills up slightly before the raptor probably because the raptor is the taller machine and thus is slightly further away from the y piece than the commanche.
I also use the raptors pump and usually keep it between 200 - 300 psi.
sounds good
four vacs and heat ... what every porty should have
would you seek out two house circuits for all that ?
good you upgraded the 2 stages otherwise total lift would be that of the weakest motor ... 95 instead of 140
so you should have 140" lift and 400 cfm ...
perhaps using 2" off the Y would be beneficial if you don't already ... or even two lengths of 2" to the door and then the Y