Superchargers are out of the question, no one really cares about those - plus they're parasitic. Everyone knows turbos make more power.

Anyways,
Exactly what Dex said - single turbos are no problem if you know how to drive. Spool time really isnt that bad, especially for supras with big singles - they spool them up fine - not on hondas thats a different story - but then we're just comparing apples and oranges, civics are not supras... Same for RX7s - take how fast RX7s rev up + the incredible amount of exhaust gas RX7s produce and compare that a cylindrical motor...there is no comparison - thats why big singles arent an issue for a 1.3L rotary motor.

Yes the T78 may not fully spool till 4500+ and not hit peak hp till 6000, but trust me, the time it takes to go from idle @ 1400 to 4500 is a lot less than you think, they rev incredibly fast - like a bike motor...not to mention ours has an extremely light flywheel, so this thing revs through the roof.

Brake boost this thing and you'll wonder why you ever wanted a V8 for the immediate neck snapping effect of taking off at a roll - this does that an more, plus big turbos leave you in your seat wondering "when the hell is this this going to stop pulling!"

You never get that "whens this gonna die off" feeling from an N/A V8 or supercharged car