The cooler Running Fans are part of my tune. I can modify the program to target a 184 degree running temp instead of 194 i do with the stock thermostat.
Maybe i am not reading this right, but seems he is saying its not good to run the lower temps.... what am i missing? seems when i run my vehicle it runs best the first 10-15 miles after start up.In answer to surgin's post, the drivetrain is designed to run at 185 - 205 degrees. The engine controls, sensors, and cooling accessories are calibrated for that setting. The old wives' tale is that running an engine cold is somehow going to "boost performance", which is very far from the truth. Yes, the engine runs colder: the fuel/air ratios are slightly richened to compensate for an engine which never warms up to design temps. The oil and engine metal remain below 200+ degrees, so the crankcase combustion byproduct volatile acids and condensation moisture never vaporize in order to be burned by the PCV system. Cylinder wall temps stay low, so there's more raw fuel to wash off lubrication. Automobile manufacturers have absolutely no idea how to design and run an engine, so we must make it better. We have learned exactly nothing in 126 years of engine building.
You can buy thermostats for $7.95 at NAPA. Any temperature you like. Any car you like. ("Yeah, but, Sub, How come boat engines run at 140 and 160 degrees ???" - "Because some boat engines are raw water cooled, and to run them at 205 causes incredible scale in the exhaust cooling systems. The fuel systems are designed accordingly and the crankcase ventilation systems are impressive."
Mark,I always find it so funny how the debate over cooler thermostats keeps raging on. YOu either want one or not and they are now available. Awesome Jesse, I definitely want one.
I can tell you, it was found on the C6 Z06 that after a certain coolant temp, the ecm starts pulling timing and fuel and what ever else it does to keep the engine safe. By replacing stat with 160 unit, on the highway I would see cruise temps of 172 or 174. At idle I had the tune turn the fans on sooner so it would run cooler there as well. So, does a cooler stat directly make the car faster? NO. But does it indirectly? YES. Because the ecm won't start making the engine run safer because the engine is not getting too hot.
Thanks for listening,
Mark
^ You can thank the epa/emissions standard for not putting in a cooler tstat in from the factory. It all has to do with emissions and not performance.
