you can use a ball valve on the wasegate line to restrict the flow of air to make the wastegate open later. you dont want to shut it 100% cause then you will overspeed your turbo

What does tha cause?

corrrect me if im wrong but turbo overspeed can cause huge destruction like metal chunks flying everywhere especially into your engine :booo:

Yeah...overspeeding a turbo is not good. Eventually, it will explode.

yup no bueno, need a gauge for that, and possibly a DP gauge too

Did this to mine, had a .3 to .4 difference in quarter mile time :tu: