I got a 2 stage boost controller in my car linking to a brand new amal valve. Now before my car went in for some work it was running 13 PSI on low boost and 26 PSI on high boost.

Since then ive had some work done on the car, the following: New Radtec twinfan intercooler, Pace Alloy Rad, Series one Chipped turbo systems ECU, New metering unit and a new amal valve.

Now the cars all back together the low boost setting runs 10 PSI and when i switch it to high it only reaches 15 PSI, How can this be adjusted ?