My 93 LT-1 (115,000 miles) Vette runs at about 225 degrees on hot days in traffic. It's pretty stock except for cat-back and Hypertech chip. It's got a Hypertech 160 degree thermostat. The system has been flushed, and the radiator is clean.

I realize that once the stat is open, it's open, so with these miles, I'm thinking that the water pump is getting a little long in the tooth - although it doesn't leak.

I seem to remember that the second electric fan doesn't cut in until 225, but I'd like it to run cooler.

Thoughts?

Jack Cox
Virginia Beach