Beefed up My six, need more power to the Rear

Yeah but at 1800 you might have 100ft lbs, and you might get 10% multiplication, so that would be an extra 10 ft lbs; "2 or 3 guys pushing on the back bumper. Or a wee bit more." And only for a few feet til they run out of breath................And then it all locks up into direct drive, mostly.
Furthermore those 10 ft lbs, at 1800 translate into 3.427 horsepower. That's just math. So I guess that would be more like 5 or 6 overweight, old guys like me..heehee

If you could make 30% to 60% at redline, why would anyone bother with supercharging.