thermostat

[sprucegagt]

Every few months this topic keeps coming up, and every few months the same responses keep coming. I wonder if this should be a sticky?

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[ssdurango]

My propane conversion manual says to use a cooler thermostat (160 or so). Propane is allready a vapor once it's been through the regulator so there is no need for more heat to completly burn it. In a boosted application, like mine, this can stave off pinging and detenation.

[blowns10]

Also consider that water boils at 200*F

Water boils at 212 degrees Fahrenheit, not 200 degrees.

Yes, definitely, this topic should be made into a sticky, enlighten me!!. Late.

[robertisaar]

Water boils at 212 degrees Fahrenheit, not 200 degrees.

Yes, definitely, this topic should be made into a sticky, enlighten me!!. Late.

if you want to get technical, PURE water boils at 212*F when not under pressure. pressure raises the boiling point significantly.

[blowns10]

Yes, pure water boils @ 212 degrees Fahrenheit, correct. And adding coolant increases the boiling point, yes you are correct. I could write for days about this stuff and I would be glad if someone would make this topic a sticky!!. Yes the engine can be made to run as hot as possible for best emissions. But heat (friction) is also the enemy, so you have to have a safe margin to work with, otherwise whatever you are running, be it differential fluid, transmission fluid, engine oils, brake fluid needs to be kept as cool as possible to keep the component working properly and to prevent overheating and warping or seizure of the component!!. Like I said, enlighten me!!. Late.

[Schmieder]

moisture in the crankcase isn't under pressure at certain stages through the oiling system.

So letting a car reach 212* will vaporize crankcase moisture, I never thought about it but it makes a lot of sense. So the fans should not turn on until 225*?

Now the question I ask is it better to have a high flow t-stat versus regular flowing t-stat, regardless of temp.

[robertisaar]

moisture in the crankcase isn't under pressure at certain stages through the oiling system.

So letting a car reach 212* will vaporize crankcase moisture, I never thought about it but it makes a lot of sense. So the fans should not turn on until 225*?

Now the question I ask is it better to have a high flow t-stat versus regular flowing t-stat, regardless of temp.

oil temp =/= coolant temp...

they do generally follow each other, but a turbo car WILL show a higher oil temp at all times compared to a N/A car in the same situation. i'm not going to explain why for fear of an anuerism.

and if you pay actual money for a "high flow" thermostat...

[ssdurango]

I just read that a test engine has been run up to 300* F and performed very well.

[Schmieder]

oil temp =/= coolant temp...

they do generally follow each other, but a turbo car WILL show a higher oil temp at all times compared to a N/A car in the same situation. i'm not going to explain why for fear of an anuerism.

and if you pay actual money for a "high flow" thermostat...

Yeah I know they don't follow temps exactly but surely the coolant has a big effect on oil temps. As coolant temps rise, so do oil temps.

Jegs sells the 'high flow' t-stats. I'm detecting your disliking for high flow t-stats. Is there a reason why? Am I missing something?

What do you mean, "fear of anuerism?" Am I detecting a disliking towards me?

[robertisaar]

no dislike, just that's it's so mind-numbingly simple, it needs not be said. more or less, turbo center housing has a lot of heat added to it thanks to the turbine half of a turbo and all of the hot exhaust gases that interact with it.

"high flow" stat... it's probably a thermostat with part of it's frame removed to increase coolant flow maybe a few percent. a thermostat opens/closes based on the temp/pressure of the coolant on the engine half of it. if you "need" more flow, you're best getting a water pump that can push more.