What if you build it so that instead of using a belt driven by the crankshaft to spin it...

What if you build it so that instead of using a belt driven by the crankshaft to spin it, the exhaust gases would spin it?

And don't give me that shit about just making a turbo. There are snailshell-shaped superchargers, too.

Pressure from Exhaust Gases can spin a small little Turbine but

They ain't moving that shit.

Nuh uh.

What advantage would this give over a regular turbine? Are they better at moving air/more efficient than a turbine?

Either way has a point that it's way too heavy to move with exhaust gas, and you'd still have lag.

Too much drag. It might spin at high rpm but it would be very inefficient at generating boost pressure. It would likely be more of a restriction than anything.

Doesn't a well tuned and pullied procharger rid itself of most parasitic losses of a twin screw with no lag like a turbo?

Is the Procharger the master race FI?

Belt slip

twin screw superchargers require too much power to spin the blades. you couldn't ever hope to make as much boost with an exhaust turbine hooked to that thing than you could with it just running off the crank.

Put it on a chain.

Why not do it the other way round? Take the blowy part of the turbo and spin it from crankshaft. Should be much easier, no?

You can always add more drag with gear ratios.
There are and are called centrifugal superchargers.