is my math correct?

i have a 6.87" crank pulley and a 2.75" sc pulley. 6.87/2.75=2.4981
im looking at a cog set up for my sc because i hate belt slip. im looking at a kit that has a 73tooth crank and a 28tooth sc pulley...... 73/28=2.6071
so in theory, this kit will make just a little more boost then my current set up correct? maybe 1psi more......not taking into acount my belt slip i have now. im thinking this set up should make about 13psi of boost with no slip...right?