what have you twin guys been setting your secondary turbo to waste at? its not exactly crucial to know this instant as im sure i've got a lot of tuning ahead of me but where is a good place to start?it seems like 24-27 psi is good but ive also heard that you should set it at half of your overall pressure. thanks

 

Half is correct Sir....

 

Set it at whatever it takes to get the big turbo to spool, and produce at least 25-30psi......the more pressure you bleed off to the big turbo, the quicker and harder it will turn.