CyberGreg, were did you put the air filter, were it didn't get water or debris. I have found from testing different vehicals for the most optimal PSI flow areas on the Car or Truck, are 9 out of 10 times is right behind the headlights. The last place you want to put the filter, is behind the radiator, it is like a dead Zone of hot air.
On my system, the air filters are placed directly behind the stock Ram air ports