FocusRS

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.

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 products perform under most conditions, nothing instills confidence at the track like pushing your creation to the ragged edge. Because, after all is said and done, that is where it counts. I am no stranger to racing of all sorts, and I can't think of anything more frustrating than working all week, or month

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 the exhilarating feeling of powering through a corner.

Mishimoto's Focus RS

At Mishimoto, we love driving our RS, and in the process of testing various parts on our engineering vehicle, the idea for

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

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 is beneficial for colder climates. I know with the heat wave that is currently engulfing a large portion of the country, not many of us are concerned with the oil reaching temperature; but in the dead of winter, it can certainly be helpful.

This hot hatch is heating up our headquarters! We have several projects in the works, so if you have not had a chance to check them out, you can do so on the Focus RS section of our engineering blog.

Stock Focus RS intercooler piping

Often, one of the first modifications to turbocharged vehicles is the intercooler. However, this time we wanted to give the spotlight to its lesser known siblings, the intercooler piping. If you have not yet had a chance to take a look under the hood of your Focus RS, we'll save you the trouble; it's tight in there. Not the best news for those of us who aim to squeeze every bit of power out of our RS. Increasing the flow to the turbo via the piping has power potential, after all.

Team Mishi is hard at work developing an entire line of cooling upgrades for our RS. Up to bat is one of the more popular modifications for turbo cars: the intercooler.

Stock Focus RS intercooler

The stock Focus RS intercooler is an interesting part of this hot hatch. As soon as images of the striking front end of this car surfaced on the interwebs, many noticed that there was a black plate blocking off a portion of the intercooler, and immediately called it out. Ford explained that the intercooler was too efficient and that, in humid climates, the excess efficiency caused condensation within the intake tract.

Testing is complete! Although we would still like to be cruising through twisty back roads logging R&D miles, it is time to bring the Focus RS back to the stables to examine our catch can. When we test our catch cans, we try to put a wide variety of miles on the car to best replicate normal driving situations. We send one of our engineers out into the wild to put our development vehicle through its paces and ensure our products are functioning as designed.

Focus RS catch can testing

Blow-by Meets it's Match

Although our compact baffled oil catch can has been tried and tested numerous times, we still want to put it through the ringer to ensure that it functions just as nicely on every application. Just like our

It's the year of the horse"power, that is, wherein the land of the aftermarket, power modifications are king. They are the body builders of the modifications stomping around yelling about protein, bro. We all want to beef up our cars and hear them roar in the face of their stock counterparts. Understandably, it is easy to get caught up in the excitement of dyno charts and power numbers while overlooking the little guy in the background. This little guy, probably talking about something nerdy, is our good friend the catch can. He doesn't scream horsepower, but instead whispers about carbon buildup on valves. And for this post at least, we are going to hear him out.

If you missed our last post, we discussed the importance of using a catch can on our brand-new Focus RS. If you want to read more about the horrors of blow-by check out  our complete write up on Blow-By

The Focus RS is a big hit at the Mishimoto headquarters, and we want to make sure to protect our newest addition. If you missed Kyle Mohan testing out the Focus RS drift mode, check out our Focus RS Drift Video. Luckily one of the first projects up to bat is our direct-fit baffled oil catch can. We know that the necessity of an oil catch can is a hotly debated topic among many car communities, and the Focus RS is no exception. From previous projects and research online, we've learned that blow-by is a real presence in these EcoBoost engines.

Focus RS Oil Catch Can R&D