My 95 Z28 has a new AC compressor etc installed by shop.
Works ok but when I put car in the shop after a run and turn it off, if I come back 1/2 hr later, there's a big puddle of water, prolly 1/2 pint at least on the floor !!
I know ACs drop some condensed H2O but this seems wonky.
Any ideas as to what this might be caused by ?

 

As long as you're getting the condensation water on the floor, and not inside the car, then there's nothing to lose sleep over. That just means your A/C system is doing a good job at removing humidity from the cabin. And if it's humid outside, you'll see more condensation than normal.