That'll be fun to set up.
To my mind, it's a waste of time. Oil pressure at idle in the Cinq is very low -- less than 1 bar. You'd be better sitting in the car for a minute or so and running the car at fast idle -- say 1500rpm. That way you'll at least have decent oil flow...............
I know that member and moderator gazzaman2k was going to fit a turbo timer, but I'm not sure if he ever did.