When I have the AC running and make a left hand turn, it sounds like there is water rushing underneath the dash. It sounds like a combination of water/slush, but there are no signs of leaking fluid besides the normal water drip on the outside of the car after the AC has been running for a while. Also, during the duration of the left hand turn, the airflow significantly decreases, then picks back up to normal flow once the car straightens out.

Although it sounds pretty cool, I'd like to get it fixed...any ideas?

 

Check whether water condensate has accumulated below the evaporator due to a clogged drain tube.