True, but a large diameter converter isn't inherently more efficient just because it's larger....and every converter has an efficiency curve.... that said some Nitrous converters behind very quick ET'ing cars are actually so tight the motor alone won't hardly do a burnout on dry pavement without at least a single stage hit.

There are guys here that probably FORGOT more than I'll ever know about converters but with a Turbo you are adding torque to the powerband at a at a rate of rise far beyond that of a Normally aspirated combo, the reason/justification for a looser converter is essentially to side step the soft part of the curve and allow the vert to hit the tires more like that of a clutch whose RPM is matched to at or near the torque peak.

With blowers/spray/turbos and even a lot of big torque strokers I think there are many people who (whether they #! realize it or #2 would admit to it) have over-stalled/flashed their combos and effectively side-step a lot of Meaty powerband they could be put to use to propel the car.

The long rams are going to make more torque sooner so maybe you want to run a turbo with a tuned HOT side to bring in the boost, the VE on this motor with this intake is going to be so high at low RPM and low throttle position you're not necessarily going to be moving a lot of exhaust gas, and as a result the turbos may not spool up as fast as you think.

I'm much more concerned about the lack of cross section for the HP you can make on the boost (on paper), as I said to move the fuel all the way through the runners is going to take up a lot of volume I'd rather have reserved exclusively for boosted AIR and then let the injector just hit the valve with the needed fuel.