Found in the instructions for the turbo master.
SETTING BOOST PRESSURE WITH THE TURBO-mASTER.
As a preliminary setting, adjust the spring to a length of 2” as measured inside the retainers. You
will leave it at this setting if you do not have a boost gauge to fine tune the wastegate. If you do
have a boost gauge and would like to adjust to an exact boost number, take several small wide
open throttle runs in your truck, each time making adjustments to the spring tension until you
reach the desired boost. The Boost pressure is increased by increasing the spring tension. Boost
is decreased by decreasing spring pressure. A boost pressure of 25 psi
is a reasonable maximum
for a stock turbocharger but will still require the DIESELSITE BRV+ to eliminate the SES
subsequent defueling of your truck. (anything over 24psi will set the SES
Hope this helps