180 degree thermostat rethink

[ub3r l33t dud3]

Quote:

Originally Posted by c2xejk I believe this is because of the aluminum block. It dimensionally changes more than the steel crank or rods... ie. as it warms up, the heads move further from the crank. In a race engine, it is "acceptable" to have to preheat the engine so that the aluminum expands enough that the pistons and rods do not make contact... This is not relevant to a 6g72 using a 160 thermostat...

lol are you sure?? just kidding

[ub3r l33t dud3]

Quote:

Originally Posted by Dr. Johny Dodge ... now , my truck usually runs at about 194 - 196 on a not to hot day hot ish for my truck is 212 now if my truck ran 180 ish , I would have more reserve if I were to demand the truck make some kind of effort that would cause it to generate more heat that usual - like pulling a heavy trailer up a steep & long hill

i understand that you are just using that as an example and am not trying to bash what you are saying at all, but in the case of creating more heat do to a bigger load like you say, it seems to me that putting in a colder thermostat to give you more reserve would be like a band-aid for the problem of an antiquate cooling system for the work of the vehicle, i would try to increase the cooling systems efficiency that way you would not have to worry about eventually running out of reserve.

again, im not trying to say that your thinking is wrong or put you down in any way, just putting in my 2 cents for that scenario

[DPE91]

I haven't been trying to say that anyone said they use it to gain performance but a few have said it does. What I have been saying is that a lower rated thermostat really would only be needed in any vehicle other than one that drag races. And that in no sensible way will a thermostat improve the actual performance of your vehicle.
And if your truck's cooling system can't cool the engine while your towing then you pushing the truck beyond what it can do or ,and i agree with what Uber said, that the cooling system needs to be either improved or serviced or you need to get a truck with a higher towing capacity.
Like I said if it ain't broke don't fix it.

[Dr. Johny Dodge]

true but the colder stat could be seen as a part of that more adiquite cooling system
- 'specially in a case like my 01 f150 - there was a heavy duty rad option on the order sheet but comeing out the end of the production line there was no such thing - but don't get me started on that issue lol
... and now that I've thought of that again , I should put a colder stat in it come spring
- considering the under drive pulley set I just bought for it , that might be a good plan

[ub3r l33t dud3]

dose it have cooling problems from the underdrive pulley? im assuming the water pump is off the serpentine belt or you probably wouldn't have mentioned it lol.

[GLHS #26]

I am not 100% sure about 3.0s but the turbo ECUs have a hot and a cold setting. Witch switches over at like 70* F if i remember right. So wether it is 100 or 200* the engine delivers the same amount of fuel. ( This is at WOT ) part throttle adjusts with O2 feedback based on fuel in the exhaust not temps.

As for power i would have to say it does add more power the cooler the engine the cooler the air entering the cylinder will be and thus more dense. On a stock car that is usually too rich that makes it a bit leaner and thus more power.

[DPE91]

Quote:

Originally Posted by Dr. Johny Dodge true but the colder stat could be seen as a part of that more adiquite cooling system - 'specially in a case like my 01 f150 - there was a heavy duty rad option on the order sheet but comeing out the end of the production line there was no such thing - but don't get me started on that issue lol ... and now that I've thought of that again , I should put a colder stat in it come spring - considering the under drive pulley set I just bought for it , that might be a good plan

Yea that bigger rad might be your biggest issue in the cooling department. Especially if the rad can't support the towing capacity the truck is "supposed" to be capable of. Ford dropped the ball on that one!

[wyochimneysweep]

max power is coolant temp of 180 and oil temp of 210.......

[ub3r l33t dud3]

Quote:

Originally Posted by wyochimneysweep max power is coolant temp of 180 and oil temp of 210.......

oh.. well that settles that then....

lol ok c'mon tell y that is

[wyochimneysweep]

It was research I seen done by a university awhile back. But you probably never get a oil temp higher then coolant

[c2xejk]

Do you know of a paper talking about this?

[wyochimneysweep]

It was about 10 to 12 years ago I seen/ read this

[ub3r l33t dud3]

Quote:

Originally Posted by wyochimneysweep It was research I seen done by a university awhile back. But you probably never get a oil temp higher then coolant

ahh ok, i would imagine there would be a difference of say an all aluminum engine vs. an all cast engine ect.

[cegan09]

Quote:

Originally Posted by wyochimneysweep It was research I seen done by a university awhile back. But you probably never get a oil temp higher then coolant

actually yes you do, all the time. The oil has no cooling (unless you throw an oil cooler on), and is constantly cycling though the engine. A turbo just makes the problem worse. The oil temp will absolutely be higher than the coolant.


Also, the cooler the engine the better. you will not see power gains from a higher temp engine, you will see more premature wear. Keeping it cool helps it live longer. If the people who programmed the ECU knew what they were doing, there will be no difference between the tuning for 180* and 200*. Most modern cars switch over to normal running by 160 or so, if not sooner.

Engine coolant temp should have no bearing on fuel added. Air inlet temp will. Air changes densities with temp, so you need to adjust fuel respectively to keep the ratio at or below 14.7:1. Doesn't matter what temp the engine coolant is at, you need to match air coming in with fuel delivered.

[jamierpm]

[QUOTE=cegan09;2513029]actually yes you do, all the time. The oil has no cooling (unless you throw an oil cooler on), and is constantly cycling though the engine.

well sorry to bust your bubble but it does actually removes around 40% of the engine heat, check this link out

IOM VoxPop | Engine Oil Functions