Answer
Aug 02, 2023 - 01:17 PM
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 MAPMAX to eliminate the SES light and subsequent defueling of your truck. (anything over 24psi will set the SES light)
