• Sign Up! To view all forums and unlock additional cool features

    Welcome to the #1 Fiesta ST Forum and Fiesta ST community dedicated to Fiesta ST owners and enthusiasts. Register for an account, it's free and it's easy, so don't hesitate to join the Fiesta ST Forum today!

Mountune Radiator vs Mishimoto Radiator

Mishi or Mountune Radiator Upgrade?


  • Total voters
    20

Crv

Member
Messages
16
Likes
21
Location
Haverhill
#21
Also-you do not need to take off the entire front end to do the mountune radiator-(un like mishi’s process) not sure if someone said that already...just get that front end about 20-24 or so inches off the ground-leave the protective shipping covers on it and slide it right up in...pull the covers off and it’s done...no dismantling the subframe...


Sent from my iPhone using Tapatalk
 


Nessal

New Member
Messages
4
Likes
9
Location
CA Bay Area
#22
I wouldn't recommend a 160 thermostat anyway. Proper engine temperatures are important to remove moisture from the oil and other things. 180 is fine. 160 is cold.

Sent from my LG-LS997 using Tapatalk

I totally agree with this. In the Lotus world, those cars actually cooled TOO well. The Exige came with two oil coolers stock and the oil never came up to temp. This caused excessive wear on the camshafts where it would grind down the lobes pretty bad. I had to replace mine because of it. You want to keep temps up even above 180F. I would say that around 210F-220F is the ideal temperature.
 


OP
The Cuzi
Messages
107
Likes
69
Location
Northern, Virginia, USA
Thread Starter #23
I totally agree with this. In the Lotus world, those cars actually cooled TOO well. The Exige came with two oil coolers stock and the oil never came up to temp. This caused excessive wear on the camshafts where it would grind down the lobes pretty bad. I had to replace mine because of it. You want to keep temps up even above 180F. I would say that around 210F-220F is the ideal temperature.
I would tend to agree with you. Specifically the warmer heat range of oil. The catch to this is that the oil and coolant temperatures are correlated on the FiST unless you transition from OEM to an aftermarket oil cooling system. Normally, my oil and coolant temperatures are within 10-20 degrees F of one another (passive observation, not a scientifically tested and metrics based opinion - so take it with a grain of salt). If my oil is 220, my coolant is at a minimum 200 and likely ~210F. Last summer highway speeds would see oil at 235-240f with coolant going into the 230's.

The correlation of coolant and oil usually isn't a problem except in gridlock. I get it, my fault for living near DC or some other sh*thole that requires gridlock. In non-moving or low airflow driving, the coolant system capabilities are quickly maxed out and the engine begins an upward hike to unsafe temperatures. I was resorting to the oldschool - heater on max temp and flow, windows down, and monitoring temperatures to keep her happy and alive. By the way, if you've never done 105F ambient in DC traffic with your heater on max you don't know what you're missing in life.

I love my FiST but I would say that the engineering team who designed the cooling system either let us down or the penny counters struck down the appropriate design.
 


shouldbeasy

1000 Post Club
Messages
1,161
Likes
431
Location
Calgary
#24
I would tend to agree with you. Specifically the warmer heat range of oil. The catch to this is that the oil and coolant temperatures are correlated on the FiST unless you transition from OEM to an aftermarket oil cooling system. Normally, my oil and coolant temperatures are within 10-20 degrees F of one another (passive observation, not a scientifically tested and metrics based opinion - so take it with a grain of salt). If my oil is 220, my coolant is at a minimum 200 and likely ~210F. Last summer highway speeds would see oil at 235-240f with coolant going into the 230's.

The correlation of coolant and oil usually isn't a problem except in gridlock. I get it, my fault for living near DC or some other sh*thole that requires gridlock. In non-moving or low airflow driving, the coolant system capabilities are quickly maxed out and the engine begins an upward hike to unsafe temperatures. I was resorting to the oldschool - heater on max temp and flow, windows down, and monitoring temperatures to keep her happy and alive. By the way, if you've never done 105F ambient in DC traffic with your heater on max you don't know what you're missing in life.

I love my FiST but I would say that the engineering team who designed the cooling system either let us down or the penny counters struck down the appropriate design.
Definitely the latter.
 


Nessal

New Member
Messages
4
Likes
9
Location
CA Bay Area
#25
I would tend to agree with you. Specifically the warmer heat range of oil. The catch to this is that the oil and coolant temperatures are correlated on the FiST unless you transition from OEM to an aftermarket oil cooling system. Normally, my oil and coolant temperatures are within 10-20 degrees F of one another (passive observation, not a scientifically tested and metrics based opinion - so take it with a grain of salt). If my oil is 220, my coolant is at a minimum 200 and likely ~210F. Last summer highway speeds would see oil at 235-240f with coolant going into the 230's.

The correlation of coolant and oil usually isn't a problem except in gridlock. I get it, my fault for living near DC or some other sh*thole that requires gridlock. In non-moving or low airflow driving, the coolant system capabilities are quickly maxed out and the engine begins an upward hike to unsafe temperatures. I was resorting to the oldschool - heater on max temp and flow, windows down, and monitoring temperatures to keep her happy and alive. By the way, if you've never done 105F ambient in DC traffic with your heater on max you don't know what you're missing in life.

I love my FiST but I would say that the engineering team who designed the cooling system either let us down or the penny counters struck down the appropriate design.


The thing is, a quality synthetic oil doesn't even begin to break down until it reaches into the high 300's and low 400's. Just as a reference, in my Exige I actually removed both oil coolers so that the temps can hover between 220F to 240F. This is considered the ideal temps to ensure that the water is evaporated out of the oil as well as keeping the oil flow rate up. At any rate, just from my past experience having to deal will temps that are too cold and causing damage to the motor, I think it is something to consider. My 2 cents.
 


OP
The Cuzi
Messages
107
Likes
69
Location
Northern, Virginia, USA
Thread Starter #26
The thing is, a quality synthetic oil doesn't even begin to break down until it reaches into the high 300's and low 400's. Just as a reference, in my Exige I actually removed both oil coolers so that the temps can hover between 220F to 240F. This is considered the ideal temps to ensure that the water is evaporated out of the oil as well as keeping the oil flow rate up. At any rate, just from my past experience having to deal will temps that are too cold and causing damage to the motor, I think it is something to consider. My 2 cents.
Makes sense, I have similar issues with my MV Agusta. If you're not thrashing on her the coolant system drops the temperatures well below the 'normal' range. But the reason for that, and likely the same as your lotus, is that it was designed for the excessive heat of racing. When I'm not asking much out of the vehicle the coolant system outpaces the need. I wish the FiST had that problem. It is easier to warm something up then it is to cool it down.
 


OP
The Cuzi
Messages
107
Likes
69
Location
Northern, Virginia, USA
Thread Starter #27
Just mounted the Mountune radiator. It was shockingly easy to install. So easy in fact that I was convinced I must have done something wrong. The paranoid side me had to triple check everything because I didn't run into any 'gotchas' during the install. Who has ever heard of that?

View: https://media.giphy.com/media/ANbD1CCdA3iI8/giphy.gif

Kickoff to touchdown was just over two hours by myself. Took a set of pliers, a panel puller, a socket set, and a flat tip. I feel like Audi could take a lesson in this simplicity.

It's a cold day so testing is more or less limited to making sure I didn't divide by zero somewhere. The only noticeable and observable change so far is the pace at which the coolant temperatures drop. I'm still on OEM thermometer so I wasn't looking at 180f across the board. But in about a half-hour of driving, I would say the approximate temperatures of coolant and oil were ~10f lower than usual which I consider a win.
 


Last edited:
Messages
406
Likes
301
Location
San Diego
#28
Just mounted the Mountune radiator. It was shockingly easy to install. So easy in fact that I was convinced I must have done something wrong. The paranoid side me had to triple check everything because I didn't run into any 'gotchas' during the install. Who has ever heard of that?

View: https://media.giphy.com/media/ANbD1CCdA3iI8/giphy.gif

Kickoff to touchdown was just over two hours by myself. Took a set of pliers, a panel puller, a socket set, and a flat tip. I feel like Audi could take a lesson in this simplicity.

It's a cold day so testing is more or less limited to making sure I didn't divide by zero somewhere. The only noticeable and observable change so far is the pace at which the coolant temperatures drop. I'm still on OEM thermometer so I wasn't looking at 180f across the board. But in about a half-hour of driving, I would say the approximate temperatures of coolant and oil were ~10f lower than usual which I consider a win.
Haha. I blocked a day off with 2 friends and we were ready to spend a ton of time getting this done.

Including a break to get donuts, we finished in about 2 hours and had the same feeling... uh, this was easy... did we mess anything up?

It's been a few months since the install and everything has been great.
 


OP
The Cuzi
Messages
107
Likes
69
Location
Northern, Virginia, USA
Thread Starter #29
Haha. I blocked a day off with 2 friends and we were ready to spend a ton of time getting this done. Including a break to get donuts, we finished in about 2 hours and had the same feeling... uh, this was easy... did we mess anything up? It's been a few months since the install and everything has been great.
Ha, exactly. Sure as hell glad I didn't have to remove the bumper as some tutorials call for.
 


Similar threads

Ford Community Posts



Top