Originally posted by donuts2001
....Remember the cooler your engine runs the less power that is generated (heat is what produces the energy for your pistons to move) ....
I recall that we've had this discussion before.
What the gauge is measuring is the temperature of the coolant. That's long after the energy has been released (as heat) during combustion. It's measuring how much heat has already been lost from combustion, passed into the head then into the coolant - minus what the radiator has dissapated into the atmosphere.
Just because the gauge reads cool doesn't mean the engine can't make power. Not for the reasons you state anyway. The fact that the ECU gets a temp reading may be making it behave less than optimally for power production however.
I'd like my engine to stay cool without radiator/cooling systems etc. That would mean that ALL available energy from combustion had gone to producing power.