Subaru WRX TGV Delete 2015+

Power through Deletion. 2015 WRX TGV Delete Kit, Part 4: Product Testing

January 06, 2016

Subaru WRX TGV Delete 2015+

# wrx, turbo, track, top-mount, teammishi, subaru, scca, oil, mishimoto, Intercooler 2015+ 2015, intercooler, heat, featured, fa20dit

We've got some interesting plans to evaluate the performance benefits of our TGV delete kit. In addition, we want to evaluate any appreciable differences in terms of air temperature between the two materials (aluminum and Delrin) we have selected for our prototypes.

Test Preparation

For our first assessment, we will evaluate airflow temperatures in both materials during dyno testing. The goal here is to determine whether the different heat transfer properties of the two materials have an impact on the airflow within the TGV unit. Ideally we would use pre-TGV and post-TGV sensors to evaluate this, but for our initial test a single sensor will be used.

We started by drilling and tapping each prototype.

Initial Data

We put together several plots to help analyze the data from our dyno pulls so we could reach a conclusion regarding appreciable temperature differences. First, a look at our initial runs with each material on both banks of the engine.

2015 WRX parts testing data

The top-level data

Power through Deletion. 2015 WRX TGV Delete Kit, Part 3: First Prototypes

December 29, 2015

Subaru WRX TGV Delete 2015+

# wrx, turbo, track, top-mount, teammishi, subaru, scca, oil, mishimoto, Intercooler 2015+ 2015, intercooler, heat, featured, fa20dit

We're back with another quick update on our TGV delete project for the 2015+ WRX. After designing our initial models and then 3D-printing a prototype for test fitting, we worked up a couple functional prototypes for on-car testing.

First Prototype Images

Check out a few images of our functional prototype deletes!

Mishimoto's 2015 WRX TGV delete prototypes

As you can see, we have two different prototypes. Although the shape and design are the same, these prototypes are composed of different materials. The polished unit is a CNC-machined aluminum piece. The black prototype is machined from Delrin, a thermoplastic material.

We want to explore any differences in intake temperatures provided by the alternate materials. As you can imagine, thermoplastic has very low thermal conduction properties, meaning it is less likely to heat-soak and is more resistant to heat transfer. That said, the surface area that actually comes into contact with the internal

Power Through Deletion. 2015 WRX TGV Delete Kit, Part 2: 3D-Printed Prototype Test Fit

December 22, 2015

Subaru WRX TGV Delete 2015+

# wrx, turbo, track, top-mount, teammishi, subaru, scca, oil, mishimoto, Intercooler 2015+ 2015, intercooler, heat, featured, fa20dit

3D-Printed Prototypes

To confirm the dimensions and design of our prototype, we decided to utilize some of our rapid prototyping tools. We fired up our 3D printer and loaded the model. Check out a couple images showing the progress of the print.

3D-printing 2015 WRX parts

Once the printing process was complete, we cleaned up the prototypes and installed them on our 2015 WRX to verify fitment.

3D-printed 2015 WRX parts

3D-printed 2015 WRX TGV delete installed

You will notice these prototypes include a rear flange to attach to the TGV solenoid. We experimented with a design that retains the flange, in order to bolt the stock solenoids in place for visual inspection purposes. After evaluating this setup, we decided the flange was unnecessary and removed it from the design. Our two functional prototypes will be more similar to our original 3D models.

Coming up - Functional Prototypes

With fitment confirmed, we began working up a couple functional prototypes for product

Power Through Deletion. 2015 WRX TGV Delete Kit, Part 1: Design and 3D Prototypes

December 15, 2015

Subaru WRX TGV Delete 2015+

# wrx, turbo, track, top-mount, teammishi, subaru, scca, oil, mishimoto, Intercooler 2015+ 2015, intercooler, heat, featured, fa20dit

It's been nearly two years since our first 2015 WRX development vehicle rolled into the shop. We've had a lot of fun with the car, and our team has developed a multitude of awesome components to aid in cooling, elevate power, and improve styling. Our product line is essentially complete, meaning we are done wrenching on our WRX. This is bitter sweet, as we will be picking up another vehicle to start the process once again. Before shipping out the WRX, we had one more project up our sleeves to extract a touch more power.

With our existing modifications, including our downpipe, intake, and cat-back exhaust system, most customers are making in the neighborhood of 290 whp and 310 wtq. Not bad for some simple bolt-on modifications and ECU tuning. We've been eyeing TGV modifications and have seen the impressive effects on Subarus from previous model years. We decided to open up the intake system on our 2015 to see if we could design a delete system that would deliver a few extra ponies.