To adjust base wastegate position, you will adjust the Wastegate Position user adjustable. The default value is 90%. If your car has wastegate rattle during idle, light cruise and decceleration conditions, try reducing this value. Reducing this value, will move the wastegates more open during these conditions. At the mimimum value of 30%, wastegates will be fully open. Try to keep this value as high as possible in order to maximize initial tip-in boost response. If your car has no wastegate rattle, you can simply leave the default value of 90% unchanged.