2018-2021 ROUSH Mustang Max Cooling Kit

JJ427R

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Roush has released the Max Cooling kit for 2018-2021 Roush SC equipped Mustangs.

Product highlights for the 2018-2021 ROUSH Mustang Max Cooling Kit:
  • Fits the 2018-2021 Mustang 5.0L V8 engine w/ ROUSH Supercharger
  • +28% Engine Cooling Capacity (More surface area and radiator volume)
  • +22% Supercharger Cooling Capacity
  • Heat extracting fender vents reduce under the hood temperatures by 14%
  • Increased cooling capacity for your engine and supercharger system
  • Max speed tested in drag racing, autocross, and road course conditions.
  • Includes all necessary hardware for installation
  • 3 year/36,000 mile limited powertrain warranty
  • What's Included
    • Auxiliary Engine Cooler (Driver Side)
    • Auxiliary Supercharger Cooler (Passenger Side)
    • (2) Fender Heat Extractors
    • (2) Gloss Black Front Fascia Corner Pocket
https://www.roushperformance.com/20...rade.html?mc_cid=08459f0d92&mc_eid=fc6a98b310
 

JJ427R

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So where are you fitting brake ducting after all that?
Not sure of that. What does the new GT500 have for ducting? I noticed part of the Roush install is drilling 32 holes in the backside of the wheel liner to allow air to flow thru, I'm assuming that air is going to pass over the brakes?

As an owner of a 2018 GT PP1 Auto that has been on a track, I am way more concerned about the cooling of the engine and trans than I am the brakes. I put my car into limp mode in 12 minutes at Road America, due to high engine temp. If the engine/trans overheats that quickly brakes aren't going to matter much. I can say I was very impressed with the Brembo's even with just the stock pads, and I did not overheat those, but I have not taken the car on track again as I consider it very dangerous for a car to go into limp mode while running on a track. Had someone been directly behind me going into Canada Corner at RA when my car decide to go limp, I could very well have been rear ended and wrecked. Luckily was able to get off track.

 

OX1

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New GT 500 is practically all "grill" on the whole front end with all the coolers, LOL!!!
 

JJ427R

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I'm assuming the new Mach 1 is the same as that has the similar cooling in the front but has Engine Oil, Trans, and Rear diff coolers. With all the coolers it would be tough to get brake ducting in there.
 

Pentalab

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Roush has released the Max Cooling kit for 2018-2021 Roush SC equipped Mustangs.

Product highlights for the 2018-2021 ROUSH Mustang Max Cooling Kit:
  • Fits the 2018-2021 Mustang 5.0L V8 engine w/ ROUSH Supercharger
  • +28% Engine Cooling Capacity (More surface area and radiator volume)
  • +22% Supercharger Cooling Capacity
  • Heat extracting fender vents reduce under the hood temperatures by 14%
  • Increased cooling capacity for your engine and supercharger system
  • Max speed tested in drag racing, autocross, and road course conditions.
  • Includes all necessary hardware for installation
  • 3 year/36,000 mile limited powertrain warranty
  • What's Included
    • Auxiliary Engine Cooler (Driver Side)
    • Auxiliary Supercharger Cooler (Passenger Side)
    • (2) Fender Heat Extractors
    • (2) Gloss Black Front Fascia Corner Pocket
https://www.roushperformance.com/20...rade.html?mc_cid=08459f0d92&mc_eid=fc6a98b310

And after all that above, it still won't work. The eng needs a bigger eng rad, but it also needs an eng oil cooler. The auto tranny needs a cooler, and so does the rear differential. Hood vents, like what's on the older GT-500's would extract a lotta heat..and reduce under hood temps a bunch...and also reduce the pressure under the hood.
 

JJ427R

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And after all that above, it still won't work. The eng needs a bigger eng rad, but it also needs an eng oil cooler. The auto tranny needs a cooler, and so does the rear differential. Hood vents, like what's on the older GT-500's would extract a lotta heat..and reduce under hood temps a bunch...and also reduce the pressure under the hood.
I would agree it needs the other coolers, although I spoke with a Roush rep regarding the Stage 3 last fall and he claimed Jack Roush Jr. tested the car on track with no overheating issues. They claim 20,000 hours testing on the 2021 Stage 3.
Roush installs a larger Radiator, but supposedly so does Ford in the PP1 and 2 cars?
Roush adds the Fender Heat Extractors for venting and reducing under hood pressure. Roush also has larger hood vents available, that are installed on their cars. they should include those with the Fender Extractors which are in the new kit.

Other issue is where do you put the additional trans and rear diff coolers?
 
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Pentalab

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I would agree it needs the other coolers, although I spoke with a Roush rep regarding the Stage 3 last fall and he claimed Jack Roush Jr. tested the car on track with no overheating issues. They claim 20,000 hours testing on the 2021 Stage 3.
Roush installs a larger Radiator, but supposedly so does Ford in the PP1 and 2 cars?
Roush adds the Fender Heat Extractors for venting and reducing under hood pressure. Roush also has larger hood vents available, that are installed on their cars. they should include those with the Fender Extractors which are in the new kit.

Other issue is where do you put the additional trans and rear diff coolers?
I notice these folks like Terry Fair et all, install megabuck OIL coolers on their coyote engs. Even with a bigger eng rad installed, the coolant temps are under control, but the oil temps can get sky high, like >300 F. It appears that the eng coolant temps can be under control but the OIL temps can be through the roof.

On your 2010, the sensor actually measures cyl head temps, but the algorithm takes that info, plus other stuff, and displays..'eng coolant' temps on the dash..and also on the OBD port. With my aeroforce gauges plugged into OBD port. it displays both ...'head temp'..and also...'coolant temp'. The actual head temp is always a few degrees higher than the inferred 'coolant temp'. Without an oil temp sensor installed, I have no way of measuring oil temps. I have no clue what the actual oil temp is, but I don't road course race the car.

When the 7 bar upper grille was installed (oem foglight delete), that made a big difference to underhood temps. Ditto when the ceramic coated LT's were installed. The 8 x primary's don't run blazing hot like oem. I can push down hard on the primary's after using the blower in 2nd gear a few blocks away, and they are the coolest thing under the hood. Also have the mating HI-flow cats..and the new cats reside beneath the front seats...instead of at the base of the eng bay. Cats run stupid hot at WOT. Between the cats under the seats, ceramic LT's, and 7 bar grille, the eng bay temps dropped 40 F...using a fluke 62 IR.

Larger front grilles work, but you gotta get the air out from under the hood. I have no hood vents, so the only route is down, and past each side of the eng block. I also have that large under eng pvc cover, that extends to almost the front of the block..and also past the oil filter. Hood vents would provide for an alternate path..and also reduce underhood pressure..which should make the car stick better at high speeds.
 

JJ427R

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My Roush I also added gauges for Engine Temp, Oil Pressure and Trans Temp. The MMD Hood Vents and Roush 7 Bar grille made a difference under the hood for sure. Even with my additional trans cooler and larger Performance Automatic Pan I still overheat the 5r55 trans after a couple sessions. That has kept me from going down that road with the 2018? Surprisingly the Roush has never really overheated the engine, just the trans, and at least that doesn't go into limp mode!
 

Department Of Boost

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Holy smokes, that is way over priced and won't get the job done. It still doesn't have enough heat exchanger core volume or water speed to begin to think about keeping IAT's down on the road course. It's not even close. If you guys want to keep your cars cool on the road course there is only one shop making stuff that can get the job done, and that's us. 2nd place is so far back it can't be seen. We're so confident in our claims that if you follow our specification guidelines we will give you a money back guarantee. Is anyone else offering that?:D

You guys should give this a read:
Intercooler System Requirements Tech
https://www.departmentofboost.com/tech/
 

OX1

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My Roush I also added gauges for Engine Temp, Oil Pressure and Trans Temp. The MMD Hood Vents and Roush 7 Bar grille made a difference under the hood for sure. Even with my additional trans cooler and larger Performance Automatic Pan I still overheat the 5r55 trans after a couple sessions. That has kept me from going down that road with the 2018? Surprisingly the Roush has never really overheated the engine, just the trans, and at least that doesn't go into limp mode!

When Roush did all that testing, was it on an automatic?
 

JJ427R

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When Roush did all that testing, was it on an automatic?
They don't specify that, however I did speak with a Roush rep and he stated Jack Jr. tested the auto on track with no overheating problems. Since posting this I have watched a couple videos of the Mach 1 auto on track, which has the similar cooling as the Roush, and the Mach 1 did quite a number of laps without going into limp mode. Mach 1 they added Transmission, rear diff, and engine oil coolers. Roush adds those as well as a larger Radiator and Intercooler.
 

JJ427R

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That is a response.^^^^^^^

Let's hear your criticism. If you have valid points I will be happy to debate them with you using facts.
I would be interested in hearing what you are offering as far as additional cooling other than a larger intercooler? That is not going to help my 2018 that has no supercharger and still overheats and goes into limp mode after 12 minutes on track. Are you offering any Trans, rear diff, and engine oil cooler packages for the S550 cars?
 

Department Of Boost

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I would be interested in hearing what you are offering as far as additional cooling other than a larger intercooler? That is not going to help my 2018 that has no supercharger and still overheats and goes into limp mode after 12 minutes on track. Are you offering any Trans, rear diff, and engine oil cooler packages for the S550 cars?

I'm sorry, I was under the impression we were talking about blown cars. I didn't even know Roush made a NA car.
 

JJ427R

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I'm sorry, I was under the impression we were talking about blown cars. I didn't even know Roush made a NA car.
We can talk about both. But for the new blown S550 cars you need all the additional coolers as well. Roush is also adding Trans, rear diff, and engine oil coolers to the Stage 2 and 3 cars they are building with the Podium Package. However the cooling kit they advertise above does not add any of those other coolers? That is what you need to run laps on a road course. You guys come up with that kit you have me for your first customer!

Roush has always had Stage 1 and 2 cars. Stage one is just Body components and interior, Stage 2 adds suspension and exhaust, Stage 3 adds the Supercharger.

Also to clarify my 2018 is a stock GT PP1 automatic. I put into limp mode in 12 minutes at Road America due to high engine temp (video above^^). That is what I'm looking for the coolers on.
 
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JJ427R

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Roush Podium Package: $7490.00 includes cooling upgrades as well as

ROUSH Active Exhaust
Engine Bay Styling Upgrade
Premium Car Cover
Locking Lug Nuts
Brembo Brake Upgrades
Active Aerodynamic Carbon Fiber Wing
 

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