overheating

[thecman02]

Just got done with a Heat Transfer class. There will be no gain from colder engine temps unless you were having knock issues. You will lose far more power from the increased heat transfer of the engine combustion event into the cooler cylinder head, then from the infinitesimally small reduction of heat transfer into the intake air charge.

 

[turbowop]

But, but, but...DENSO!

 

[prove_it]

/ubbthreads/images/graemlins/rofl.gif

 

[Barnes]

Only advantage of a bizarrely cold thermostat is that it can give you a thermal reservoir if you have no other choice.

For a thermostat to do its job, your radiator has to be able to reject more heat than your engine generates.

In the situation where your engine generates more heat than your radiator rejects, a colder thermostat would give you a larger thermal reservoir to delay temperature rise. I.E. If your coolant, block, head, radiator, etc etc are at 160 degrees F when you start to generate more heat than your radiator can reject, it will take LONGER for the coolant and related parts to reach an unsafe temp.

 

[G]

^ What he said, especially for turbocharged vehicles that generate heat faster.

 

[Barnes]

I'm glad you agree G, but that doesn't mean I agree with anyone running a cooler thermostat. For 98% of the people here, if an OEM temp thermostat isn't working, and a lower temp is needed, IMO there is a weakness in their cooling system.

To me, relying on thermal inertia (thermal reservoir) is not something you normally want to do.

 

[prove_it]

I'm guessing the OP had an air pocket stuck in there. That will cause the temp sensor to "see" overheating as it's reading the hot air instead.

Coolant filler funnel

I use that all the time. Works sooooo good. Cheap too. You can buy just about everywhere. You'll never have a pocket.

 

[turbowop]

I use the same funnel for filling/burping my car. Zero mess and gets all air out of the system.

 

[transparentdsm]

Quoting prove_it:
I'm guessing the OP had an air pocket stuck in there. That will cause the temp sensor to "see" overheating as it's reading the hot air instead.

Coolant filler funnel

I use that all the time. Works sooooo good. Cheap too. You can buy just about everywhere. You'll never have a pocket.



yeah it was a bubble i think, car is running like a top. im really happy. now i just need to tune.

Barnes - thats what i was thinking. if you need to use that low temp. of a thermostat to keep it at a normal operating temperature then you have more problems to fix,not try to patch them up with a colder thermostat.

if it was a track car that i was doing 5000 rpm launches, 8500 and up rpm shift going 120mph then yeah id want to use it because im abusing the crap out of the car, but for the daily normal driving its gonna see if it wont run on a 180 degree thermostat i need to know why.

 

[turbowop]

Quoting transparentdsm:

if it was a track car that i was doing 5000 rpm launches, 8500 and up rpm shift going 120mph



That sounds like my car, which certainly isn't just a track car. /ubbthreads/images/graemlins/rofl.gif A 180 works just fine for me. Hell, I used a 190 when I ran those times.

 

[transparentdsm]

oh, well then looks like im gonna be just fine. as long as i dont overheat once i add the thermostat tomorrow.

 

[G]

I wasn't trying to offer the colder thermostat to try and fix or patch the problem, but rather troll it out there in case anyone wanted to buy it.

 

[prove_it]

Quit shitting up his thread man....

 

[G]

Settle down girl.

 

[prove_it]

/ubbthreads/images/graemlins/grin.gif