Welcome to the North American Subaru Impreza Owners Club Sunday April 19, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Classifieds > New Product Development

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 12-16-2014, 04:25 PM   #1
Mishimoto
NASIOC Manufacturer
 
Member#: 207954
Join Date: Apr 2009
Default Mishimoto 2015 STI Performance Air Intake!

Hey guys,

We are getting a bit further along in the build process for our 2015 STI intake. Follow the build process on our blog, or posted in this thread!

http://engineering.mishimoto.com/?cat=179

Mishimoto 2015+ Subaru STI Performance Cold-Air Intake System, Part 1: Project Introduction and Goals


Launch Edition Subaru STI in Mishimoto garage

Introduction
Our team is finally working on some cool components for the new 2015 Subaru STI! As you know, the 2015 STI is essentially a hybrid of old and new Impreza components. It features the newer body style paired with the trusty EJ engine, instead of the new DIT motor featured in the WRX. We won’t get into which is better or which we prefer, because we have nothing but praise for the updated chassis. Our team has spent a great deal of time with both vehicles, and we are impressed with how the STI drives, handles, brakes, and functions as a comfortable yet sporty sedan.

As you may already know, we developed an intake system for the 2015 WRX recently, and we had a ton of success producing some really nice power gains. We also offer an intake system for the 2008–2014 WRX/STI equipped with the EJ engine. You can see where we are going with this. Before we had a look at the STI, we already knew we had a chance to use some preexisting components from one or both of the intake systems we already offer. Not only would this speed up the development process, but it also means we would be using proven components. Before we set our engineers loose on this vehicle, we set up some guidelines for this particular project.

Project Goals
  1. Must be direct fit and require no vehicle modification.
  2. Must provide an increase in power output while maintaining safe AFRs on the stock ECU tune.
  3. Include all necessary components for installation.
  4. Fully test product to provide real-world data.
Yes, these goals are rather intuitive, but we will provide a bit more detail below.

Direct Fit
As with any aftermarket component, fitment problems are always a consideration. Nothing is more frustrating than trying to install your new component, only to find that it has been poorly designed and does not fit well. Our goal here is to develop an intake system that is a 100% bolt-on unit. Obviously you do not want to have to modify your brand new car, so this kit will have to fit without any cutting, drilling, or trimming. Our engineering team is no stranger to this requirement, so this should be an easy one.

Adding Safe Power
Intakes and applicable tuning have been hotly debated in the WRX/STI community for some time. If possible, we will design this intake to provide increased power on the stock tune, and we will test this unit extensively to ensure engine safety is not compromised. With our 2008–2014 intake setup, we achieved gains of 25 whp and 25 wtq on the stock tune with completely safe AFRs. We tested this unit in all forms of engine operation to be sure that our customers would not have issues. The same testing regiment would be needed for the 2015 STI intake we design.

Easy Installation
An intake upgrade should be a simple bolt-on modification. We want this process to be extremely simple and achievable, requiring only simple hand tools and a basic mechanical knowledge. Part of making this process seamless is the inclusion of all necessary components for installation, which is a top priority for this project.

Testing Data
The last goal is the most important. We conduct a ton of testing for each product that leaves the facility. If it was designed by Mishimoto, you can be sure that we thoroughly tested and perfected our design. Our in-house Dynojet will certainly help with this portion of development. Our thorough testing and presentation of test data are key elements that separate our company from the others.

Vehicle Evaluation
With our goals in place, it was time to pull the STI into our shop and start evaluating potential designs and product fitments. The kind owner of this 15’ Launch Edition was nice enough to lend his brand new vehicle for some testing. Check it out!


Launch Edition Subaru STI in Mishimoto garage


Launch Edition Subaru STI stock engine bay


Launch Edition Subaru STI stock engine bay

First, we wanted to check fitment for a few of our 2008–2014 components to see if anything would cross over to the new chassis. After replacing the stock intercooler with the Mishimoto unit, we noticed that this low-mile 2015 vehicle is already showing some oil in the intercooler system … evidence that a catch can system would be a wise investment. We will be working on a direct-fit kit for the 2015 STI, similar to what we offer for the WRX.


Stock intercooler oil buildup


Stock compressor housing oil buildup

Next we slid our intercooler into position to check for any fitment concerns. We were happy to discover that our 2008–2014 STI intercooler is a direct fit for the 2015 model as well!


Mishimoto intercooler installed on 2015 STI


Mishimoto intercooler installed on 2015 STI

We also checked out a variety of other vehicle components and discussed the similarities and differences in an informative video review. Check it out below.


First Mock Up
Now, back to the project at hand! With all our other product test fitting out of the way, we could begin planning what we would like to do for the intake.

Knowing that the body of the 2015 WRX and STI is similar, we started with checking the fitment of the intake box we designed for the WRX. The box obviously fit into the same location in the STI, but the piping presented an issue. With its front-mounted turbo setup, the WRX intake system utilizes a different intake tube setup that would not work with the STI box. Next, we grabbed our race intake system for the 2008–2014 models, which utilizes an intake box and a short-ram pipe with filter. We then mocked this unit into place.


Mishimoto intake box mockup


Mishimoto intake box mockup

This design could certainly work, requiring modification to only the box. The setup also features a larger MAF housing compared to the stock inlet pipe. This would cause some issues with our claim of “no tune required,” which is why we offer this kit for 2008–2014 owners with aftermarket tunes. By doing so, we can cater to customers who have aftermarket tunes, as well as those who want to stick with the stock tune. We will come back to this particular setup later, when we move forward with a race intake design for the 2015 STI.

Check back with us next time as we explore another option for this intake system!

Thanks
* Registered users of the site do not see these ads.
Mishimoto is offline   Reply With Quote
Old 12-23-2014, 12:43 PM   #2
Mishimoto
NASIOC Manufacturer
 
Member#: 207954
Join Date: Apr 2009
Default

We have an update on this project! Check it out below!

http://engineering.mishimoto.com/?cat=179

Mishimoto 2015+ Subaru STI Performance Cold-Air Intake System, Part 2: Prototype Fabrication

Prototype Fabrication

After experimenting with some boxed designs in Part 1 of this write-up, it was time to turn our attention to a shrouded setup, similar to what we offer for the 2008–2014 models. We’re hoping we could utilize the piping from our existing kit, which is well designed and has proven power gains. After placing the shroud into position, we found that it would certainly fit, but would require some modification. The fabrication work began! Check out a few shots taken during the process.


Mishimoto intake shroud modification


Mishimoto intake shroud modification


Mishimoto intake shroud modification

Once all fab work was completed, we had a functional shroud that we could use for testing purposes. We could also use this shroud to develop a 3D model for our production units. Take a look!


Mishimoto modified intake shroud


Mishimoto modified intake shroud


Mishimoto intake modified shroud

We could then combine this shroud with our intake pipe, shown below, to capture some performance data.


Mishimoto intake pipe

This pipe features a stock MAF housing, as well as an air straightener to provide laminar flow across the sensor.

Check back next time for a look at the testing process, and the results from our dyno pulls! Check out the teaser shot of this car getting setup on the dyno!


2015 Subaru STI on dyno

Thanks!
Mishimoto is offline   Reply With Quote
Old 01-13-2015, 10:03 AM   #3
Mishimoto
NASIOC Manufacturer
 
Member#: 207954
Join Date: Apr 2009
Default

Our data is up! Check it out below.

Mishimoto 2015+ Subaru STI Performance Cold-Air Intake System, Part 3: Testing

Dyno Testing

Time to see what kind of power gains we are able to achieve with our intake design! First, we strapped this Launch Edition to the dynamometer.


2015 STI on the dynamometer


2015 STI on the dyno

Then we began making pulls. On our first day we tested only the stock intake system. Once complete, we installed the Mishimoto intake system and sent the vehicle out for some road testing. We wanted to allow the ECU to adjust to the new intake before making our pulls. After well over 150 miles of road use, we returned the next day to compile dyno data for the Mishimoto intake.


2015 STI on the dyno

Testing Results

So how did we do? Well, I think the plots below summarize our results quite well.


2015 STI dyno plots

As you can see, our intake made a great impact on performance, especially at the upper end of the rpm range. The biggest gains occurred from around 5,000 rpm to redline. We saw peak power increases of nearly 20 whp and around 6 wtq. We also saw maximum gains of 22 whp and 17 wtq.

With our past intakes that make power on the stock tune, we have had a few inquiries regarding engine longevity, AFRs, and knock. Our AFR charts for the runs above are shown below.


2015 STI AFR plots

Although leaner than the stock curve, we are still well within a safe range for engine operation up through redline. Also, we experienced zero counts of knock during our dyno and road testing. These results were expected and are similar to those from our 2008–2014 intake system.

Intake Shroud Design

Now that we had positive testing results, we could move forward with producing our STI-specific shroud to get this product on the market! Check out a rendering of the design in 3D!


Mishimoto intake shroud render

Thank you very much for following along with the progress of our intake. This was quite an exciting project!

We are around 8 weeks from releasing this item. Would anyone be interested in a discounted presale offer for the members of the forum?

Let us know and we can set something up!

Thanks
Mishimoto is offline   Reply With Quote
Old 01-13-2015, 10:05 AM   #4
jimazz
Scooby Newbie
 
Member#: 382302
Join Date: Feb 2014
Chapter/Region: Tri-State
Vehicle:
2015 STi
CWP

Default

Take my money!!
jimazz is offline   Reply With Quote
Old 01-13-2015, 10:56 AM   #5
Mishimoto
NASIOC Manufacturer
 
Member#: 207954
Join Date: Apr 2009
Default

Quote:
Originally Posted by jimazz View Post
Take my money!!
Haha! One in for the pre-sale. Anyone else?
Mishimoto is offline   Reply With Quote
Old 02-03-2015, 02:57 PM   #6
Mishimoto
NASIOC Manufacturer
 
Member#: 207954
Join Date: Apr 2009
Default

Another update!

Mishimoto 2015+ Subaru STi Performance Cold-Air Intake System, Part 4: Race Intake System

As noted earlier in this article series, we would be tackling a race intake system to go along with our bolt-on unit. So what makes the race system different? For this particular system we are using a larger-diameter intake pipe with a larger MAF housing. This means greater intake flow, but it also means it will no longer function with the factory tune. This system is meant specifically for drivers who want aggressive professional tunes so they can take advantage of airflow modifications such as larger turbochargers and high boost pressures.

Because the 15’ model shares the EJ from the previous generation, we would be using the same intake pipe and filter as we did with our 2008–2014 kit. This unit is shown below.


Race intake pipe


Mishimoto air filter

Here is a look at this system fitted to a 2010 STi!


Mishimoto 2008–2014 Race Intake installed

So, all we truly needed was to design an airbox that would accommodate this pipe and function with the body of the new 15’ model.

We hit Solidworks and came up with the design you see below!


Mishimoto 2015 STi Race Intake rendering


Mishimoto 2015 STi Race Intake rendering

We are working towards completing this kit alongside our bolt-on intake. Keep an eye out for a pre-sale on both kits coming next week!

Thanks
Mishimoto is offline   Reply With Quote
Old 02-09-2015, 03:02 PM   #7
J03K3R
Scooby Newbie
 
Member#: 404350
Join Date: Oct 2014
Location: Buffalo, New York
Vehicle:
2015 WRX STI
WR Blue Pearl

Default

I'm in for the intake if there is still a presale
J03K3R is offline   Reply With Quote
Old 02-10-2015, 04:46 PM   #8
jimazz
Scooby Newbie
 
Member#: 382302
Join Date: Feb 2014
Chapter/Region: Tri-State
Vehicle:
2015 STi
CWP

Default

Just saw the pre sale is up. How long will the pre sale go for? Waiting for my tax return lol

Last edited by jimazz; 02-10-2015 at 04:52 PM.
jimazz is offline   Reply With Quote
Old 02-11-2015, 10:13 AM   #9
Mishimoto
NASIOC Manufacturer
 
Member#: 207954
Join Date: Apr 2009
Default

Quote:
Originally Posted by J03K3R View Post
I'm in for the intake if there is still a presale
Thanks! Details on the pre-sale are shown below.

Quote:
Originally Posted by jimazz View Post
Just saw the pre sale is up. How long will the pre sale go for? Waiting for my tax return lol
Check out the details below. This deal will be available until the first week of March!



Start Date: 2/10/15

Est. End Date: 3/3/2015

Est. Ship Date: 3/6/2015

Performance Cold Air Intake


Price: $265 + Shipping

Link: http://www.mishimoto.com/subaru-wrx-sti-performance-cold-air-intake-15.html

Product Specs

  • Direct fit for 2015+ STI
  • Maximum gain: 20+ whp and 18 wtq
  • Mandrel-bent aluminum pipe offered in polished, wrinkle black, and wrinkle red
  • Includes heat shield to protect air intake from hot engine heat
  • Rubber cap supplied for noise generator
  • Made in USA
  • Mishimoto Lifetime Warranty

Tech Specs


Images









Race Air Intake System

Price: $170 + Shipping (W/Out Box)
$275 + Shipping (W Box)

Link: http://www.mishimoto.com/subaru-wrx-...intake-15.html

Product Specs

  • Requires tuning
  • Direct fit for 2015+ STI
  • Installs in under 30 minutes
  • Larger-diameter intake pipe for large turbochargers and more aggressive engine tunes
  • Exclusive optional airbox retains stock-like appearance and uses stock air-intake snorkel
  • Provides highly aggressive intake tone under acceleration
  • CNC-machined air diverter helps maintain reliable and consistent MAF readings
  • Works with stock and aftermarket induction hoses
  • Fits with front-mount intercooler kits
  • Mishimoto Lifetime Warranty

Tech Specs


Images







Feel free to follow up with any questions or comments!

Thanks
Mishimoto is offline   Reply With Quote
Old 03-25-2015, 02:14 PM   #10
Mishimoto
NASIOC Manufacturer
 
Member#: 207954
Join Date: Apr 2009
Default

Hey guys,

We have had a few shipping delays that have pushed back the actual ship date for this pre-sale. Our finished kits are expected in our warehouse very soon and we will begin filling orders from the pre-sale immediately. I apologize for the delay and any inconveniences this has caused.

Once these units ship out everyone who placed an order will receive tracking information via email.

Thanks again for all of the orders guys!

-John
Mishimoto is offline   Reply With Quote
Old 04-02-2015, 05:02 PM   #11
jspec4dr
Scooby Newbie
 
Member#: 392785
Join Date: Jun 2014
Default

Do you guys have an install guide or a reference guide we can use for this?
jspec4dr is offline   Reply With Quote
Old 04-07-2015, 02:45 PM   #12
Mishimoto
NASIOC Manufacturer
 
Member#: 207954
Join Date: Apr 2009
Default

Quote:
Originally Posted by jspec4dr View Post
Do you guys have an install guide or a reference guide we can use for this?
Sorry for the delay! Our video team is a bit backed up at the moment. The instructions for install are very similar (nearly identical) to our 08-14 STi intake system. The video below should help out!

https://www.youtube.com/watch?v=tkNfPou7KB0

Let me know if you have any questions!

Thanks
-John
Mishimoto is offline   Reply With Quote
Old 04-10-2015, 02:05 PM   #13
Mishimoto
NASIOC Manufacturer
 
Member#: 207954
Join Date: Apr 2009
Default

Hey guys,

Thanks to all who joined our discounted pre-sale! These intakes are officially available for purchase. Check out the details below.




Subaru STI Performance Cold-Air Intake, 2015+

Product Specs
  • Direct fit for 2015+ STI
  • Maximum gain: 20+ whp and 18 wtq
  • Mandrel-bent aluminum pipe offered in polished, wrinkle black, and wrinkle red
  • Includes heat shield to protect air intake from hot engine heat
  • Rubber cap supplied for noise generator
  • Designed in Delaware, USA and filter made in USA
  • Mishimoto Lifetime Warranty

Tech Specs


Images









Subaru STI Performance Race Intake, 2015+

Product Specs
  • Direct fit for 2015+ STI
  • Installs in under 30 minutes
  • Larger-diameter intake pipe for large turbochargers and more aggressive engine tunes
  • Exclusive optional airbox retains stock-like appearance and uses stock air-intake snorkel
  • Provides highly aggressive intake tone under acceleration
  • CNC-machined air diverter helps maintain reliable and consistent MAF readings
  • Works with stock and aftermarket induction hoses
  • Fits with front-mount intercooler kits
  • Designed in Delaware, USA and filter made in USA
  • Mishimoto Lifetime Warranty

Tech Specs


Images





Product Development
http://engineering.mishimoto.com/?cat=179

Feel free to follow-up with any questions or comments!

Thanks
-John
Mishimoto is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 02:35 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.