Ok i just picked up the turobxs mbc for 40 bucks and i was wondering which way would it be best to hook it up. (i got a tial 38mm wastegate, vacuum line of intake manifold)

Method 1)subracting boost to wastergate; Cut the line going to the lower portion of the tial and instert the mbc.

Method 2) Addition of boost to wastegate; Run another line to add on top the astegate to add pressure.

And according to turboxs' webpage one turn = one psi, is this true for both methods?

 

I just run the bottom nipple