Procharger? How to determine Boost/Pulley SIze?

[THE GOON]

I'm trying to determine what pulley sizes I need. FOr the sake of keeping this easy let's just use cog/gilmer as the reference point. Is there any way to determine what size crank and blower pulleys to start with to coincide with my intended boost level?? I have this worksheet to use as a reference point if it helps??

I know that the The smaller the crank cog the slower procharger turns and the lower the boost



The smaller the procharger head cog the faster the procharger turns – more boost.

But what size do I start with or is it all trial and error?? I really don't want to have to buy 6 sets of pulleys.