CT checking in here.
This thread feels familiar.
As it'* been said, 15F degrees won't have a huge effect. Why does either side argue over this 15F degrees? The end answer from my viewpoint is I am only trying to help the person with a plastic intake manifold to not break down sooner, and the supercharged person to get the best mileage and power while still passing emission testing w/o any issues.
Afterall, if more heat makes the engine more efficient.... why didn't GM use an even hotter thermostat. There are points at which heat and cold are better for certain things. The engineer that designed this motor made certain choices for reasons that will remain a mystery to us forever. (I like to look at the coolant passages next to the EGR in a plastic composite upper intake manifold).
Have either of you 95LHS or Cooey considered taking a testing approach to this debate?
Log information on your current 195 T stats
Log information after changing to a 180 T stat
And then changing the temperature range hotter with another thermostat and logging information with that.
From the debate and heated discussions and I'll quote a small section
As an engineering student, I can confirm this. The basic theory goes like this:
1.) The hotter the combustion chamber temperature, the less heat loss there is through the block/heads.
2.) The less heat (energy) lost through the block/heads, the more there is to power the car. "
Those of us here have proven through actual trial that lowering the temps has not negatively effected performance, but enhanced it. As students learn...sometimes theory does not remain cosnstant when variables are introduced. An engine being many systems built on each other...there are many variables that do not remain constant.
As engineering students are you willing to risk what is necessary to prove or disprove the theory of a hotter engine producing more power and running better? Since the club testing has been 15F degrees cooler, let'* say you run 15F degrees warmer. However take into account that the fan turn on temps etc in the PCM would need to be adjusted up.