Pardon my being an udder newb but can you control boost with a SC from in the car like you can with a turbo?

 

no

you can change the pulley and that's it

otherwise you can change the timing or change out exhaust, cams, headers, etc which also has an effect on the boost pressure, though it's misleading cause you can be making more power with less "boost" than a setup with a higher boost number, but restrictive exhaust

 

Thought so, So if I want to have a tune for 2 boost levels (ie. one for the street one for the track) turbo is a must, eh. Well hmm.