Tag Archives: FocusRS

Diff’s Hot, Take it Easy – Part 1: The Rear Differential

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 … Continue Reading ››

Cool Operator – Oil Cooler R&D, Part 3: Track Testing

Update: Check out this awesome video of our track testing for this oil cooler!
What more could a company filled with automotive enthusiasts want than a track day as a workday?! If it were up to me, I would start building our offices adjacent to my favorite tracks and have every meeting in the infield, because I can’t think of a more excellent way to spend the day. I have to begin by thanking you all for collectively pushing for track data. While the type of testing we normally conduct is sufficient for learning how well our … Continue Reading ››

The Heel-Toe Hero – Focus RS Pedal Spacer R&D

From its conception, the RS was designed to be an enthusiast’s dream. The car is beyond agile and begs to be driven within inches of its limits, and assuming its driver is alive and breathing, they are more than happy to oblige. If you have driven a Focus RS, you know that it is happiest heading into a corner, hunkered down, with the RPMs up. With the aggressive driving style that the RS demands, comes the dark art that is heel-toe. Only the best can tame the RS with properly executed downshifts, and in return it will reward you with … Continue Reading ››

Cool Operator – Oil Cooler R&D, Part 2: Prototype Testing

High oil temperatures can shut down a track day faster than you can scream your favorite four-letter word. Unfortunately, high oil temps are already sidelining RS owners at the track. Not to worry, Team Mishi is on it!  In our last post, we took a look at the stock cooler and our plans to create a larger one. Now it’s time to construct and test our prototype.
Prototype Focus RS oil cooler bracket
Prototype Focus RS oil cooler bracket
Prototype Focus RS oil cooler bracketContinue Reading ››

Cool Operator – Oil Cooler R&D, Part 1: Stock Review

While we plan to create an entire line of cooling products for the RS, some require more immediate attention than others. The oil cooler is shaping up to be one of these items. With a stock cooler that’s less than adequate, and oil temps on track days that could make Chuck Norris sweat, we have a problem brewing.

Stock System

The stock oil cooler is a liquid-to-liquid heat exchanger and therefore relies on the radiator to cool the oil, as well as the coolant. This style of oil cooler also acts as an oil warmer, bringing the oil to operating temperature, which … Continue Reading ››