cookie28b

Hi all, I'm new here.
I have an idea and would like to find out from the people that would know.
I currently have a tuning box fitted to my S4, pretty happy with the result.
What I would like to know is if I install one of the oversize crank pulleys to run the supercharger faster but leave the bypass at the factory setting, what would the result be?
My way of thinking is the factory maximum boost level will remain but it will reach that maximum level earlier in the rev range.
Is this feasible or am I talking rubbish.