Mishimoto Rear Differential Cooler R&D

[Kenny]

Mishimoto currently testing Ford Focus RS Rear Differential Cooler:

At Mishimoto we are big fans of our little blue car. Over the past few months you could say we have formed a bond that only burnouts and track days can build. In testing various Focus RS parts (and maybe doing a few donuts, for science) we noticed that it is very easy to make the rear differential in the RS angry, and you won’t like it when its angry. The rear diff makes the rules. Overheat it, and you’re likely to end up parked for the day. When the rear diff heats up, the ECU in the RS pulls power in an attempt to cool it down. Therein lies the problem: We have a car that begs to be driven to the absolute limits and rear diff that is programmed to shut down when it reaches a certain temperature. Don’t get us wrong, the problem doesn’t seem to be with the diff itself, but rather with its inability to dissipate heat fast enough to keep up with this blue bat out of hell.

[Louie Coppellotti]

Kenny, where is the actual cooler unit located as its not obvious (to me) in the photo?

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CheeRS

Louie

Revo STG2 Beta Map 433hp 450lb-ft 610.1 nm

?????? Game REVO

[Kenny]

It will be behind the diff I think its the only place it can be located

[Louie Coppellotti]

10/4 but not shown in that pic?

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CheeRS

Louie

Revo STG2 Beta Map 433hp 450lb-ft 610.1 nm

?????? Game REVO

[Kenny]

No they are still working on heir first prototype. Hard to say if it will all work at this stage as it will be cooling the rear diff fluid in a bid to stop the RDU switching off as it seems the temps are not measured from the RDU (according to the Pistonheads GKN interview). Instead, it has a duty cycle log and presumably a throttle position or engine torque figure mapped to the duty cycle. So once a certain amount of engine torque has been directed to the rear, it will start to back off on AWD application, eventually even shutting off the RDU.

[Louie Coppellotti]

Ah got ya dude, well it will be good to see the dev stages and IF the cooler stops this issue. Another thing that the after market tuning houses are correcting that IMO should have been part of the development and final build that Ford dished out…..Ho Hum!!!

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CheeRS

Louie

Revo STG2 Beta Map 433hp 450lb-ft 610.1 nm

?????? Game REVO

[white-rs2]

Hello Kenny

Did the R&D ever get done and did this product ever get released for sale ? Any pictures ?

🙂

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RS Edition.

FPM375 Rocks

The rest of the “M” maps suck

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