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Discussion Starter · #1 ·
Has anyone upgraded to the 160 degree thermostat, our cars need all the cooling benefits we can get. it would only make sense to upgrade...

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Discussion Starter · #3 ·
I just started looking for 1 online, kind of scary how identical it looks to the Mazda thermostat.

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I've noticed that my car with the Mishi IC and radiator has trouble getting above 170-180 in the winter mornings. Putting a lower temp t-stat would make it harder for the engine to warm up during these months. If you live in hot, humid weather or race the car frequently then this might be a good idea to keep the engine cool.
 

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Folks please keep in mind if you are running your car hard for extended periods a colder thermostat will not have any effect on the coolant temperature. Under these conditions the thermostat will be wide open and your coolant temperature will be a function of how much heat the radiator can reject.

Under light load conditions where the radiator has more capacity than needed a colder thermostat can regulate the coolant temperature at a lower level. BUT, under these conditions you want the coolant at the highest temperature possible for improved efficiency and reduced emissions.

The other side effect of a lower temperature thermostat is that fuel can condense on cylinder walls and wash away lubricant resulting in more wear & more fuel dilution of the oil.

I would not recommend going to a lower temp thermostat unless you have a very specific issue you are trying to address. It is certainly not something you should do to a mildly modified engine that spends the majority of it's time on the street.

Dave
 

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Dave is correct. In the old days, some manufacturers would have different thermostat specs (MGs and Triumphs come to mind) for hot and cold climates, but that was more to get the engine running at a higher temperature in the cold, not so much the other way around.
 

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Where is the t-stat located on a Mustang Ecoboost?
it's in the plastic housing under the intake manifold. it has the lower radiator hose and the hot water bypass connected to it. Dave is correct though, changing the thermostat will not increase the cooling systems ability to cool the engine.
 

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it's in the plastic housing under the intake manifold. it has the lower radiator hose and the hot water bypass connected to it. Dave is correct though, changing the thermostat will not increase the cooling systems ability to cool the engine.
Thank you, I did find it shortly after I posted this. I'm wondering if it's easier to remove it from above or below?
 

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Thank you, I did find it shortly after I posted this. I'm wondering if it's easier to remove it from above or below?
definitely below. there are 3 bolts. 8mm head. i was mistaken though. the extra hose is a heater hose. the hot water bypass is above the housing.
 

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Hmmm. So I have a heavily modified ecoboost, full bolt on's, big turbo, spraying Methanol etc. My coolant tank recently cracked and I'm about to swap it out. I have a livernoise colder thermostat sitting in a box and was planting on swapping it. I live in AZ where the inside of a car easily reaches 124° (yes I know the cabin temp has nothing to do with the engine temps lol) and I can't imagine what the temps are on the motor but right now it's overheating. I'm assuming it's the tank but I'm not 100%.
Anyway, I plan of doing 1/4 mile runs on it once I get my tune complete but this car is also my daily. Mind you we never see snow uh Phoenix AZ. Do you think I should leave the stock thermostat? Once my tune is said and done I'll be around 450whp & 480wtq-500wtq with Methanol of course. Any input would be greatly appreciated.


Folks please keep in mind if you are running your car hard for extended periods a colder thermostat will not have any effect on the coolant temperature. Under these conditions the thermostat will be wide open and your coolant temperature will be a function of how much heat the radiator can reject.

Under light load conditions where the radiator has more capacity than needed a colder thermostat can regulate the coolant temperature at a lower level. BUT, under these conditions you want the coolant at the highest temperature possible for improved efficiency and reduced emissions.

The other side effect of a lower temperature thermostat is that fuel can condense on cylinder walls and wash away lubricant resulting in more wear & more fuel dilution of the oil.

I would not recommend going to a lower temp thermostat unless you have a very specific issue you are trying to address. It is certainly not something you should do to a mildly modified engine that spends the majority of it's time on the street.

Dave
 

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Hmmm. So I have a heavily modified ecoboost, full bolt on's, big turbo, spraying Methanol etc. My coolant tank recently cracked and I'm about to swap it out. I have a livernoise colder thermostat sitting in a box and was planting on swapping it. I live in AZ where the inside of a car easily reaches 124° (yes I know the cabin temp has nothing to do with the engine temps lol) and I can't imagine what the temps are on the motor but right now it's overheating. I'm assuming it's the tank but I'm not 100%.
Anyway, I plan of doing 1/4 mile runs on it once I get my tune complete but this car is also my daily. Mind you we never see snow uh Phoenix AZ. Do you think I should leave the stock thermostat? Once my tune is said and done I'll be around 450whp & 480wtq-500wtq with Methanol of course. Any input would be greatly appreciated.
I would stay with your original plan and change the thermostat. I only have minor mods and a lower hp/tq range. And my car is more difficult to drive and less efficient. One more change won't make that much difference.
 

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The colder t-stat does drop the coolant and head temps a bit, on the street. It had no effect on maximum temps during HPDE (even with the larger PP rad). Max coolant temps hit 240 on track. But that is pushing the motor hard for 20-30 min at a time. You should be fine for 1/4 mile runs of 11-12 sec.
 

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@Coyote Chaser & @SVO Mk II
Thank you for the response fellas.
My next question is, do you know where the thermostat is on the EcoBoost?
I haven't been able to find much on its location.
Only thing I found is that it is under the intake manifold. I'm assuming I can follow the big silicone hose from the tank or radiator to it?


Well I just realized I read that here lol
 

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@Coyote Chaser & @SVO Mk II
Thank you for the response fellas.
My next question is, do you know where the thermostat is on the EcoBoost?
I haven't been able to find much on its location.
Only thing I found is that it is under the intake manifold. I'm assuming I can follow the big silicone hose from the tank or radiator to it?


Well I just realized I read that here lol
Yes, that is basically the best way to find it. It's a bit difficult to get wrenches on the bolts, but it can be done.
 

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I tell you what, I installed mishimoto radiator, and my temps stay at 175/185 all day even idling for long periods of times. I used to sit at 200+ all day at any time, except highway cruising, it would be 185. but now, nope. 185 all day idling, I mean if I idle for an hour im sure it will go up. but it literally stays on the spot.

when I get off highway, and I let off fuel and say im in gear 3 or whatever, I just see the temp CHT dropping, 2 2 2 2 2 2 2 2 2. it can be 170 from 185 when I reach the light.

I think it was worth the effort.
 

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I tell you what, I installed mishimoto radiator, and my temps stay at 175/185 all day even idling for long periods of times. I used to sit at 200+ all day at any time, except highway cruising, it would be 185. but now, nope. 185 all day idling, I mean if I idle for an hour im sure it will go up. but it literally stays on the spot.

when I get off highway, and I let off fuel and say im in gear 3 or whatever, I just see the temp CHT dropping, 2 2 2 2 2 2 2 2 2. it can be 170 from 185 when I reach the light.

I think it was worth the effort.
I just installed the Mishimoto rad. I'm hoping it helps bring down temps during HPDE. I see 240 coolant, 260 head, and 280 oil, after 15 min, with a stock tune. At 280 oil, the ECU starts pulling boost (understandably). The Mishimoto oil cooler had zero impact on track oil temps. I'm hoping the larger rad can pull temps down 20 deg across the board. Fingers crossed.
 

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Last week I test drove a 18 a10 car they had on the lot. Within 5 mins of 30-35 mph the car was like 200*-215* cht just driving around.

got back in my car, and it was 175-185 entire time; even idling.

it is triple the thickness of my nonpp rad. I wasn’t a PP stock, so it’s absolutely gigantic in comparison. Pp ecoboost has slightly larger stock rad
 

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Thank you for the response y'all.
Here is a pick of the thermostat location for anyone else that might be looking.
I might do the radiator some time down the line but for now just the silicone hoses and thermostat.
 
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