So at idle you're saying the turbo just stops spinning?
And again, a small turbo setup is easy to build with NO LAG. And remember, a turbo has way more torque on a zetec than a s/c,,, so....... you've just been schooled.
And what happens on a small 4cyl street car is quite different than a V8. So although your supercharger on your truck may be good for it, a s/c on a zetec isn't a great idea. And even on your truck you can get more power a turbo, but if you don't want power, than that's fine, I was under the impression that this guy wanted power. Yes you can set it up so a s/c zetec is faster than a lotta turbo zetecs, but at the expense that it most likely won't be streetable.
