Keep the gain set fairly low for now, you need to adjust the set to the boost level you require. Set is given out as a percentage of the solenoids ability, therefore there isn't a set number you should set it to for an amount of boost. Start low with the set, and gently increase it until you get the desired amount of boost. You need enough a good amount of load on the car to do this properly, say 3rd or 4th gear. A rolling road would be best/safest to get it setup right. Thanks Mike Jones Tuning Developments Ltd