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The search continues to find the optimal blend between a high-quality WOT (wide-open throttle) exhaust sound and a rich sound during normal driving and light-throttle driving situations. In this segment, we continue with our 2015 Mustang exhaust sound testing to see if we find our second or third prototype setup pleasing.

Dyno Testing

We set up our EB on the Dynapack for some more sound collection. We also kept an eye on power output and AFR readings to see if power changed on the factory tune, and to see if the improved flow would impact AFRs in any way. On our 2015 WRX, we saw these readings lean out a bit with the cat-back installed, so we wanted to see if this was the case with the 2.3L!

First Prototype: Sound

We're starting this article with a recap of Part 1 of this series, which highlighted our first prototype for the 2015 Mustang EcoBoost exhaust design. If you recall, this design featured a midmuffler as well as two rear mufflers.

We promised a sound clip of our first design, so check it out below!

As you can hear, this setup is not quite what we are looking for. Although our mufflers are more free-flowing compared to the stock units, the sound of the EcoBoost is still stifled quite a bit. In fact, actual noise increases over the stock exhaust setup are minimal and nearly unidentifiable.

We needed to make some modifications to create a more prominent sound. Back

If you follow any of the product development going on here at Mishimoto, you should have noticed our recent concentration on the Ford Mustang EcoBoost. So far we've developed, tested, and perfected a variety of awesome new components, including the list below.

• Performance Intake System
• Direct-Fit Catch Can
• Direct-Fit Oil Cooler
• Baffled Coolant Expansion Tank (still in the works)
• Downpipe (still in the works)
• Radiator (still in the works)
• Intercooler
• Intercooler Pipes
• Low Temp Thermostat (more on this soon)

The next target on our list will help your EcoBoost breathe a little easier, in the form of a larger-diameter and better-flowing cat-back exhaust. This is especially helpful for vehicles with aftermarket tuning packages. Combined with our 3" downpipe that is being developed, the exhaust system will provide the necessary flow for very high power goals, not to mention the sound you can expect with a larger

Interested in picking up our Mustang EcoBoost Intercooler Pipe Kit? Check out more details on our product page linked below!

Mishimoto Ford Mustang EcoBoost Intercooler Pipe Kit

After putting some final touches on our pipe design in 3D modeling software, we concluded the design phase of this project. With only inspection of our final prototype and final test fitting on the agenda, this project was nearly complete.

Final Prototype Pipe Kit

Check out a look at the final prototypes we worked up!

Mishimoto hot-side (left) and cold-side (right) intercooler pipes

We are always trying out new testing methods and conducting really different kinds of R&D here at Mishimoto. A few weeks back, we performed quite a cool test to evaluate heat transfer on one of our upcoming intercoolers.

What we did!

We have been seeking ways to evaluate the transfer of heat through intercooler cores that we design. Although we have a variety of software programs that can reveal air dispersion and flow, additional data points are always helpful, especially if we can see the changes as they occur.

At some point we stumbled across thermochromic paint additives. This interesting powder has been around for quite some time. It is simply added to a paint clear coat, and it tints the clear to your color choice, in our case, black. Then, once the painted object reaches 86°F, the tint becomes translucent, revealing the base color.

Now, if you are like me, you are already online looking for this paint additive and making plans to

Interested in picking up our aluminum coolant expansion tank? Check out more details on our product page linked below.

Mishimoto Ford Mustang EcoBoost/V6/V8 Aluminum Coolant Expansion Tank

Last time we gave you some insight into the internal and external design of our expansion tank, and now we have our first prototype! Keep in mind, this prototype was constructed to verify fitment and functionality. We selected our standard polished finish, but we are certainly keeping in mind all the feedback regarding the finishes and colors everyone would prefer.

Mishimoto Expansion Tank Prototype

No more stalling, check out our prototype tank!

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