180 or 195 stat?

Fopar · Jul 10, 2007

I know different motors like more or less heat, I know mopars dyno better with colder water temps in general... what about fords? Any down sides to going to a 180?

HISSIN50 · Jul 10, 2007

No downside with a 180*F stat unless California is a lot colder than I remember it. With our GT's propensity to ping, keeping operating temps lower isnt a bad thing.

You can run too cool and have issue with engine wear and air-fuel trim, but neither should be of issue if temps are 180-195*F.

Go with a decent stat if you change it - I like Mr Gasket but R. Shaw and other performance stats should work just as well. THey're worth the few extra bucks.

Good luck.

Fopar · Jul 10, 2007

yes actually I too like the Mr. Gasket large diameter thermostats . I figure if it's a little too cool the ECU will be turning fan on and off anyways...

HISSIN50 · Jul 10, 2007

Fopar said:
I figure if it's a little too cool the ECU will be turning fan on and off anyways...

It's always a good idea to come up with alternate fan control. The fan doesnt come on till ~208*F (low) and 226*F (high). Low shuts off at 200*. That's just stupid (done for emissions).

I keep my target temp at 186*F, for example. Doing this helps maximize temp reduction from the T-stat. Otherwise, the stat change only really helps prolong the time it takes the car to heat up.

Good luck.

Stanger007 · Jul 10, 2007

Also, in our PCMs, the cold fuel strategy is set to kick in below 180 degrees and from what I have read (DISCLAIMER: I am no expert) engine wear increases significantly when you are outside of the 190-210 degree range.

I'm running a 180deg tstat, stock radiator, stock airdam and stewart water pump. That keeps the temps down quite well where I live. With the addition of some lower fan on/off temps, the car stays quite cool even at the track hotlapping it.

Go with what HISSIN says above - he is the cooling system god and will steer you right.

Wes

95BLKGT5.0 · Jul 10, 2007

My car pinged when I went to a 180deg tstat.

Went back to the 190 and the pinging stopped.

Fopar · Jul 10, 2007

well I dunno if mines been tampered with but my fan turns on earlier (and stays on all the time). I was watching it with a scanner before and the ECT was reporting 197-205 idling and the fan was on the whole time .

Fopar · Jul 10, 2007

oh and it doesn't use the low speed... only kicks on the high speed.... ECT shows kicks on around 195 or so...

Fopar · Jul 13, 2007

ah just a follow up, I found a 192 deg unknown brand thermostat in there. It wouldn't even fit in the thermostat housing the right way so they had put it in backwards. With the 180* stat it stays around the "N" which it should, oh and the fan kicks on right after the first mark which is probably at 180 or lower...

igotyofire · Jul 13, 2007

i just put a mr gasket 180, im also here in cali and ill say it made a huge difference....but i think that was mostly because my last one im assuming wasn't cycling properly. i would order the gasket as well, summit sells it.

96stangRC · Jul 13, 2007

hmm...with my Fluidyne radiator and 195 t-stat, my water temp doesn't go over 180-185 degrees even in 90 degree weather. With the 180 t-stat, it wouldn't even warm up enough and was running 150-160 degrees

bill302 · Jul 13, 2007

i vote for *180 mr. gasket or stant super stat....i like the design of the mr. gasket and i like the gurantee of stant which says the thermostat sticks it will stick in the open position...

HISSIN50 · Jul 13, 2007

96stangRC said:
hmm...with my Fluidyne radiator and 195 t-stat, my water temp doesn't go over 180-185 degrees even in 90 degree weather. With the 180 t-stat, it wouldn't even warm up enough and was running 150-160 degrees

Huh? The T-stat is what regulates coolant temps. You have to remember that the coolant temps vary widely throughout the system. Depending upon where your gauge sender is, there can be a difference right there (same gauge, same sender will read differently in different locations).

Fopar · Jul 14, 2007

HISSIN50 said:
Huh? The T-stat is what regulates coolant temps. You have to remember that the coolant temps vary widely throughout the system. Depending upon where your gauge sender is, there can be a difference right there (same gauge, same sender will read differently in different locations).

ya i'd have to agree with that, and add that maybe your gauge is wrong... I don't care how good your coolant system is if the stat isn't open it's not going to work.

igotyofire · Jul 14, 2007

Fopar said:
ya i'd have to agree with that, and add that maybe your gauge is wrong... I don't care how good your coolant system is if the stat isn't open it's not going to work.

lol if it doesn't open the car should overheat....not be cold

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