for example using the TVS 1320 (since it is the smallest available currently)
If you are shooting for 6 psi (~.4bar or 1.4 pressure ratio)
(1m^3 = 1000L, volume is per hour)
2L X 7400rpm X 60 (minutes in hour) X 1.4 = 1,243,200 or 1,243.2M^/hr
If you look at what that gets us, it gets us running on the lower side of good efficiency and still spinning those poor bearings into the high side of their range, (diagonal lines are Rotor RPM) and this Super charger is still too big for this application really, and it's 15" long and needs to be intercooled some how.
This is, to the best of my knowledge, the best super charger line up on the market currently. I don't want to talk about the vortec style or procharger what ever you want to call the half-turbo-parasitic-loss-lumps, those were designed because they are easier to install than turbos (for driveway tuning) and didn't have the same limitations for effective power band,
Turbo's overcome their RPM limitations by having Wastegates to alleviate extra exhaust flow that would exceed the turbo's safe RPM limits. they also allow tuning of the manifold pressure based on loud pedal position relative to the floor.
TURBO LAG...anyone who complains of turbo lag needs to go drive something with a new, properly sized, turbo. and the High compression and DI are only going to make the turbo spool faster. My track car (hpde time attack) is an S13 with a 9.0:1 SR20det and a Forced Performance gt2868 (billet 68mm wheel on a garrett GT28 Hotside/CHRA) it made 230 lb ft at 2700 RPM, and before i got the TiAl Vband housing and external wastegate it would hit boost cut at 6000 (well shy of redline) putting 341hp down on 19psi (boost cut value)
That is my idea of a perfectly drivable,
MONSTER. I envision using the same turbo on this motor in this calendar year....shhh it's a secret...