With Sports chrono, per factory , the PSE is activated
( loud) whenever you go to sport mode.
It is very easy to make it ALWAYS loud.
All you need to do is to install an off switch in the power going to the solenoid valve.
But , if you want to make it QUIET when you are in sport mode, you will need to find a separate 12 volt power source to OPEN the solenoid valve ( it's normally closed .The solenoid opens /closes the vacuum line which in turn opens and closes the exhaust pipe dampers)
You can do this with a DPDT switch which gets power from the PSE system in one position and power from an alternate source to make it quiet in the sports mode (if the switch is in the ashtray, you can tap into the cigarette lighter wire )

Have fun.