Quote Originally Posted by Bug View Post
Perry,The way it was explained to me is that the coolent needs to stay in the radiator long enough to cool it off a bit before going back to the motor. This was from a Corvette geru. Not saying that is the answer for you, but it worked for me.
It also allows time for the coolant to absorb the heat from the block/heads to be carried into the radiator. I am also a fan of the sleeve type of thermostat and not the cheapie poppet style. Most of the parts houses will gladly sell you a cheap poppet style for around 5 or 6 bucks. Ask for a sleeve type or get a "high performance" unit from Summit or Jegs. It usually costs a couple bucks more but the performance difference is well worth it! IMHO / FWIW / YMMV