Firstly, FSE boost valve or just a plain adjustable fuel regulator ?
If i get a plain reg thus increasing fuel into the engine and with air induction i can channel in more air = more power , right ?
But...this is fine while i'm moving but when stoped i wont have the higher air intake so will the engine flood with fuel ?
well you have highlighted one of the main problems with them, its a bit of a blunt instrument, you can only increase over the whole rev range.
you dont really need a power boast valve, thats what the airflow metre is for. It fuels the car based on air flowing into it, you stick a k+n and exhaust on, flows more air, ecu fuels more. Most modern engines are set to overfuel out fo the factory anyway, for safetys sake. dont go and upset the balance with more pressure.