1.5 bar on a standard intercooler is way too much. I wouldn't like to run more than a bar. The ACT (Air Charge Temperature) and water temp are not the same. Just cos the engine temp is nice and low doesn't mean the ACT's are.

Since the fitment of a full width Pace intercooler I rarely see temps over 33deg on the move whereas on the old Pace unit they used to go off scale by the top of 4th gear. Which is not good for the engine