Ford Focus ST Intercooler 2013+

We've noticed that the 2013+ Ford Focus ST has little wiggle room when it comes to gaining power strictly from bolt-on parts. Even with stage 3 tunes, not many ST's out there see horsepower numbers beyond 300-350hp. That barrier can be surpassed with the use of ethanol or a bigger turbo, but on a stock turbo and pump gas, those numbers aren't going too far north.

With our intercooler, we wanted to bring on some positive effects for the power in this stubborn 2.0L engine. While power is important, we also needed to monitor the outlet temperatures with a visual analysis of heat transfer across the core.

Setting up our prototype for some dyno runs

One of our newer pieces of equipment is a neat little camera that detects thermal activity. It has been pivotal as our visual aid when looking at heat-soak and dispersion across stock intercooler applications, as well as our upgraded prototypes. We used it on our loaner ST to see how the stock unit handled the heat and how we could make it better.

It looks like mother nature is giving the tell-tale signs to us gearheads that it's time to get ready for track season. The weather is getting warmer and tracks all around the country have kicked off calendar seasons with maiden 2017 events already in full swing. A common mod many of us who are boosted, especially ST owners, want during this time of year is the intercooler. The 2013+ Ford Focus ST features quality design for its the factory intercooler, but improved efficiency is something we like to target. In the last update, we talked about the shortcomings of the factory core and how we plan to make an even more efficient intercooler. Now that we have received our production samples for the first time, we can get into the details of the design plan and what our goals are to improve performance.

Fitting our prototype framework on the Focus ST

Factory shrouding will fit with our design

Intercooler fitment is always a very important aspect of intercooler design. Since the pipes are connected

George R.R. Martin isn't the only author who can write some gripping stuff about the cold. That's right, brace yourselves, winter is coming; and we are jumping into the frigid waters which we know well - improved intercooler performance. The patient going underneath our scalpel for R&D is the 2013+ Ford Focus ST, but per our usual process, let's first take a brief second to examine the stock system.

Our Ford Focus ST intercooler getting inspected

Ford decided to use tube-and-fin construction for this intercooler instead of bar and plate. The difference between the two is pretty simple. Tube-and-fin intercoolers are more commonplace amongst stock applications. They are lighter and promote greater airflow through the core exterior. The trade-offs to these qualities are less heat transfer and more susceptibility to road damage.

Bar-and-plate intercoolers, however, have increased cooling efficiency over a tube-and-fin design. They are physically a stronger intercooler, meaning they can withstand