Page 8 - boost

Exciting things are happening in the induction world here at Mishimoto. We have a 2014 Subaru Forester XT in for intake R&D. This AWD turbo Subaru comes with a 2.0L power-plant, giving an output of 253 hp from factory. It shares the same FA20 heart with its 2015+ WRX counterpart, so there are some similarities between the two.

Subaru forester parts under analysis

Stock System Review

The stock Forester XT intake system is somewhat similar to the stock WRX intake system, yet featured some differences in shape and size. With both systems, the airbox is tucked away in the engine bay. To an untrained eye, it can be easy to miss upon first glance.

The airbox mounting points on the vehicle are also quite different

It has been a while since we have updated this project, but we now have something for our WRX community!

The brief data report below shows our gains with this race intake project and our baseline was a fully stock 2015 WRX with no upgrade or aftermarket tune. The numbers are quite high due to the upgrades already installed on the WRX during testing. These upgrades included our Mishimoto:

• Downpipe
• Cat-Back Exhaust
• Front-Mount Intercooler
• Custom Engine tune

WRX intake dyno testing

We have some dyno data for this Focus ST Intake! Along with sharing our performance improvements, we also have video clips of the intake lid both on and off, so you can clearly hear what is going on while the engine is under wide-open throttle.

Our test vehicle is bone stock, with no aftermarket Focus ST parts, allowing us to provide a nice baseline for performance gains against the stock intake.

Results

In addition to using a fully enclosed airbox, the full 3 inch diameter piping extending all the way to the turbo ensured smooth, clean, and ample

The time has come to test our prototype design for the MK7 intake. After weeks of designing and fabrication, the prototype for this VW is now ready to hit our Dynapack dynamometer so we can collect some data.

Testing these prototype MK7 GTI parts for overall power output gains over stock is important, so that's the first thing we needed to figure out. The larger diameter piping compared to the stock system provides increased airflow that will have a direct impact on improving power output. This car did happen to come with an aftermarket stage 1 tune on it, so we tested our intake with that software upgrade.

The prototype for our MK7 GTI intake system will be unique. While designing the airbox, we needed to accommodate the factory mounting points, the battery cable routing, proper filter placement inside the box, and the stock fresh-air inlet scoop. Let's take a look at the gradual progression to a fully functioning prototype!

We gathered some piping in our garage and tack-welded together an intake tube route. We then sorted through our air filters to locate an appropriate air filter that would fit within the constraints of the airbox we had in mind. The filter will be placed right next to the fresh-air inlet, optimizing the amount of fresh air that will pass through the pipe.

The Piping

MK7 GTI intake prototype

It's been a while since our last update on the Fiesta ST cat-back exhaust and we are excited to let you in on the details of the final prototype! The last detail to square away was the exhaust tips. While the tips we had were decent, we found them a little on the plain side so we switched it up. Rather than the single-wall tips, we went with a dual-walled setup that we think look much better on the ST and will hold up better over time. Check out some photos below!

Fiesta ST exhaust tips

We've got hot hatch fever! One of the newest vehicles to grace our garage, which happens to be our 3^rd hatch for intake development, is the new 2015 VW GTI. Although Volkswagen was far from the first company with a hot hatch in its lineup, it was one of the first companies to really push the popularity of the design. VW is synonymous with the term "hot hatch" to most automotive enthusiasts. With the emergence of VW's newest GTI, it's time for us at Mishimoto to design our own intake for this turbocharged 2.0L engine.

GTI arriving at the shop!

Goals

Newer GTIs can either come with or without a Secondary Air Injection (SAI) pipe. Basically, this is a system that forces more air into the exhaust during

We have been hard at work developing our 2013 Ford Focus ST intake system. When the stock intake system was removed, there was room to get creative for improving airflow. Right off the bat, you can see how Ford designed its intake to grab as much cold air as possible by using the two tubes that both conjoin at the front grille and connect into different points on the box. We know it will be important to retain this feature and include it in our airbox design for the Focus ST intake.

Fabricating the Prototype

With the removal of the stock Focus ST intake leaving a good amount of space, we wanted to design an airbox that uses that space effectively. After the space was carefully and thoroughly surveyed, we got to work fabricating and welding together a working prototype!