Mishimoto Downpipe R&D

[Mishimoto]

Any update John?

Thanks for the interest! Our prototype is nearly complete. We should have this first unit in for test fitting at some point this week. An update will follow with some cool images and hopefully a few sound clips.

Thanks!
-John

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[Mishimoto]

Project update! Check it out below. :cheers:

Unleashing The EcoBoost. Downpipe Development, Part 3: First Prototype Presentation and Test Fitting

It is quite an exciting week here at Mishimoto. Yes, that’s right … our first prototypes of the Mustang EcoBoost downpipe assemblies have arrived and are ready for test fitting and some road testing. Our extensive 3D-modeling design work has paid off with some very nice downpipe prototype pieces. No more delay, on to the images!

First Prototype Images

Our first prototypes include both a catted downpipe and a catless downpipe. Each unit features a two-piece design for easy install, a slip-joint connection between the two pieces, and a V-band connection at the rear cat-back connection point.

We will start with a look at the upper portion of the downpipe that mates with the turbocharger. First, our catless pipe.

Mishimoto EcoBoost catless downpipe prototype

Mishimoto EcoBoost catless downpipe prototype

This piece features a couple interesting details. The ball-style flange is designed to emulate the stock downpipe and will mate perfectly with the stock turbocharger exhaust flange. Two oxygen sensors on this pipe will function with the stock sensors and their respective locations. We’ve also designed a stock-style mounting bracket that should fit perfectly with the stock mount. The slip fitting shown at the bottom of the image above attaches to the rear portion of our downpipe.

Our catted design is similar and includes the converter itself. Check out a few images of this prototype!

Mishimoto EcoBoost catted downpipe prototype

As noted above, this piece connects directly to the rear portion of our downpipe assembly. This portion is identical between catted and catless setups. Check out a few shots of the rear portion.

Mishimoto EcoBoost downpipe prototype, rear section

Mishimoto EcoBoost downpipe prototype, rear section

Some pretty nice welds on this prototype!

Mishimoto EcoBoost downpipe prototype, rear section

As you can see, we are including a flex section to allow movement of the exhaust and engine without causing any damage or cracks to the exhaust. We also provided an additional oxygen sensor bung on our EcoBoost downpipe for drivers who wish to add a wideband gauge to their vehicles.

The V-band oriented at the rear portion of this exhaust is designed to provide flexibility for catback exhaust options. For drivers who wish to stick with the OEM system, we will include an adapter to reduce to the stock catback.

Mishimoto EcoBoost downpipe-to-catback adapter

And a look at the full kit!

Mishimoto catted downpipe prototype kit for EcoBoost

Prototype Installation

We installed our first prototype to determine if any fitment changes were necessary. As we discussed earlier in this article series, we want this kit to bolt into position just like the stock system.

First, the stock downpipe was removed.

Stock EcoBoost downpipe removed

Once the stock piece was out of the way, we bolted our prototype into position.

Mishimoto EcoBoost downpipe installed

Mishimoto 2015 Mustang EcoBoost downpipe installed

Good news! Everything fit perfectly, and all flanges and mounts mated exactly as designed. We can check fitment off our to-do list for this downpipe.

Notice the neck-down in pipe diameter as it reaches the catback portion of the exhaust. We include an adapter designed to reduce to the stock catback size. For our larger catback, we will also be providing a V-band pipe that will retain the large piping diameter throughout the exhaust system, thus reducing restriction and improving flow.

Coming Up!

The first Mishimoto Mustang EcoBoost downpipe prototype looks great and fits perfectly. Our next plan is to evaluate the sound produced with this downpipe installed as well as how it reacts in terms of power output and tuning.

Check back next time for another in-depth look at this prototype!
Thanks for reading!
-John

 

[bigspoondude]

Does the pipe downstep by 1/2" where the downpipe meets the catback or is this just a bad angle? Love the shiny!

BTW you need to have a before and after sound without the catback so people get an idea of how it changes the raw engine noise before it gets filtered by the muffler.

 

[Ultimateone]

Well looks like I will most likely get this downpipe, looks awesome.

 

[jbailer]

Looks great John, following closely.

 

[turtleboy]

Will it fit to my Flowmaster cat back? Awesome product and design, thank you! If the price is right, I'll have this on my car! ;-) You guys are amazing!

 

[Mishimoto]

Does the pipe downstep by 1/2" where the downpipe meets the catback or is this just a bad angle? Love the shiny!

BTW you need to have a before and after sound without the catback so people get an idea of how it changes the raw engine noise before it gets filtered by the muffler.

The downpipe itself remains at 3" until the v-band at the end. We then have an adapter which will transition the size to mate with the factory cat-back. For those bolting on our cat-back, we will have a v-band adapter which mates the pipes, retaining a 3" ID until the y-section where it splits to dual 2.5" piping. This will provide unrestricted, smooth exhaust flow.

We will absolutely have a before and after video with the stock cat-back as well as our larger diameter cat-back unit.

Well looks like I will most likely get this downpipe, looks awesome.

Thanks for following our progress!

Looks great John, following closely.

Thanks!

Will it fit to my Flowmaster cat back? Awesome product and design, thank you! If the price is right, I'll have this on my car! ;-) You guys are amazing!

It does look like they will be compatible! The Flowmaster setup appears to neck down at the downpipe connection to the factory size. Using our adapter, the systems should bolt into place just fine. Do keep in mind that this will neck down quite a bit at this connection point. As noted above, combining our downpipe and cat-back will eliminate the need to neck-down to the factory piping size.

Thanks for the comments guys!
-John

 

[Mishimoto]

Another update guys!

Unleashing The EcoBoost. Downpipe Development, Part 4: Prototype Testing

With our first EcoBoost downpipe prototype complete and fitting on the EB perfectly, it was time to perform some product testing. We wanted to do so for two reasons. First, we wanted to see the impact on power output with a tune, our intake, and this new downpipe we developed. We have been watching the progress of the EB HP/TQ race on the forums, and we wanted to see what kind of numbers our car could put down. On top of this, we are also itching to drive this Mustang with a bit more power. Our second purpose for testing this component was to evaluate the sound quality of our 2015 Mustang EcoBoost downpipe once installed.

Dyno Testing

In some related news, we have a new toy to play with in the shop, a Dynapack dyno. We’ve already been testing this unit with our 2015 WRX and so far it is an extremely nice tool for our team. The necessity to test our EcoBoost downpipe provides another excuse to make some pulls and aggravate our office neighbors for the day. Fun!

Preparing for EcoBoost Mustang downpipe testing

Preparing for EcoBoost Mustang downpipe testing

Preparing for EcoBoost downpipe testing

Of course we caught some of the action on film for your viewing pleasure. Check out the video below for a compilation of our EcoBoost Mustang downpipe testing.

[ame]

We also swapped downpipes during the test to see if any appreciable power or sound differences were produced with catted and catless setups. Power output was relatively similar, although this was likely a reflection of the tune we were using. It is certainly possible our cat-less setup would provide a slight improvement in output due to increased flow. Sound was essentially identical for both of our 2015 Mustang EcoBoost downpipe options.

Dyno Results

Mishimoto 2015 Mustang Ecoboost downpipe testing data

Pretty nice numbers for a few bolt-on modifications. This particular comparison was a completely stock EB against the same vehicle with our downpipe, intake, and a tune. With the modified setup, we saw peak torque of just under 400 very early in the pull, which tapered off until redline. Horsepower does the opposite and eventually peaks just above 305. This results in a peak gain of 22 whp and 118 wtq! Output is going to depend very heavily on the tune in use. This test was simply to ensure flow was sufficient with our design and to put some basic numbers behind what can be achieved with our intake, downpipe, and a quick tune.
The heat produced with testing also tinted our EcoBoost Mustang downpipe slightly, which is normal with stainless steel seeing such temperatures. In fact, it looks pretty slick. Check out a few shots!

Mishimoto EcoBoost downpipe after dyno runs

Mishimoto 2015 Mustang EcoBoost downpipe after dyno runs

Discounted Pre-Sale

We now have a final design that fits well, performs well, and meets all of our expectations. Time to start manufacturing! In the coming weeks we will be running a discounted pre-sale for those interested in picking up a downpipe from our first batch of units.

Check back for more details on pricing and estimated shipping information!

Thanks
-John

 

[3AlarmStang]

Looking good!

 

[Mishimoto]

Looking good!

Thanks for taking a look!

-John

 

[TJP719]

Interesting that there wasn't much of a power difference between catted vs catless with all else being the same.

Always a good read John.

 

[Mishimoto]

Interesting that there wasn't much of a power difference between catted vs catless with all else being the same.

Always a good read John.

Yes, we saw variances of around 5 whp between the setups, but this could also be slight changes from one run to the next. We used the same tune for both setups, which likely was a big contributor to the similar output.

In general, the tune is going to dictate how much power you make with either down-pipe and any other modifications you have on your vehicle. We just wanted to provide some kind of baseline as to what a quick tune and a couple bolt-ons produced on our EBM.

Thanks for reading!
-John

 

[JungleG1337]

Look good. Base on your answer to the other bro about fitting with the flowmaster catback, Would this take away the hp and torque gain?

 

[Mishimoto]

Look good. Base on your answer to the other bro about fitting with the flowmaster catback, Would this take away the hp and torque gain?

It shouldn't make a huge impact on this. We still saw nice power gains with the factory cat-back mated to our down-pipe. Assuming the flowmaster setup necks down and then enlarges past the mid-section, gains should certainly be applicable. Not optimal, but it should not make a massive impact. Ideally you would want to retain a larger diameter through the full length of the exhaust to reduce flow restrictions. This is our intention with our downpipe/cat-back setup.

Thanks for the inquiry!
-John

 

[Tederer]

Looks and sounds great with your exhaust buildup. Do you have stats and/or sound with the stock cat-back?
Since I'm new to modifying, would your new exhaust be CA legal?
Thanks

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