Twin.. and taking full advantage of the variable housings, especially if there's only 4 cylinders running each
So, what would you like to discuss about the idea?
Compressor map, drive pressures, mass flow, pressure ratio, adiabatic efficiency, turbine maps, mass flow for expected power, boost vs mass flow, displacement requirements, etc?
Gimme a frame of reference to discuss what you're after.
What about two turbo's is one heck of a broad topic...
Might take a couple days to collect my thoughts though.
Turbo science is a black art all in itself....lot more to it than just making one fit.
I'm calculated out to wanting about 42 lbs/min of air at around 14.7 psi at around 2500 rpm to reach my Hp/tq goals....still lots of math to do and turbo maps to review yet though.
fueling it will be a different story....