Thanks for the info. I assume they also use vacuum along with the springs since you can use a boost controller.pimpiumz34 said:You can adjust them with springs or some form of Manual or Electric boost controller. Most gate companies will sell springs with a listed bar rating telling you how much boost to expect when that spring is installed in the wastegate. They aren't always acurate, but will get you in the ballpark. A boost controller is your best bet after you get your base spring installed. It allows for quick boost level change and fine tuning.
A 38mm gate will work fine if it's properly located.