How much water can these engines suck in before they start to foul out?

I remember watching a documentary on PBS several years ago about the
development of the triple seven. They showed Pratt & Whitney developing the
new engines. The engines were running on the test bed and they basically
had something like four huge firehoses spraying water in the engines. They
didn't miss a beat.

Cheers,
Geoff Glave
Vancouver, Canada