IAG Performance Archives

Project GD STI, Installing an Upgraded Precision Ball Bearing Drop In Turbo and Larger Injector Dynamics Injectors

Posted on June 4, 2023June 4, 2023
byMike Kojima

In our previous article, we had gotten a new Precision Turbo ball bearing center section drop in factory replacement turbo to replace our previous turbo that was choking our engine…

View Post

Project GD STI, Fixing all the Details!

Posted on September 25, 2022September 28, 2022
byMike Kojima

There are a lot of small details involved with swapping an engine, especially when upgrading all of the system parts for higher performance. These make the difference in the reliability…

View Post

IAG’s New Easy Plug and Play Drive By Wire Big Throttle Body for the EJ257.

Posted on August 4, 2022August 5, 2022
byMike Kojima

We previously had gotten an IAG Performance big throttle body for Project STI, although it was a nice piece it was not exactly user-friendly. You had to get the drive-by-wire…

View Post

Project GD STI, Out with the Old and in with the New!

Posted on August 2, 2022August 3, 2022
byMike Kojima

It is time for us to swap out our damaged EJ257 and install our IAG 700 engine. We spent a lot of time waiting on parts to finish the job,…

View Post

Freeing up the EJ257 Intake Flow with Process West and IAG

Posted on April 24, 2022
byMike Kojima

We were planning to run a Cosworth intake manifold on Project STI’s IAG motor but we were unable to find one for a decent price as they have been discontinued…

View Post

Features

Superlap Battle COTA, an Insiders Look at Working an Event

Posted on February 24, 2022
byMike Kojima

Last week I flew to Austin Texas to support Evasive Motorsports in their efforts to turn a fast lap at Super Lap Battle at the Circuit of the Americas or…

View Post

Project GD STI, Getting Ready For the Engine Swap

Posted on January 30, 2022
byMike Kojima

In our previous articles, we covered the build-up of our EJ257 engine collaboration with IAG Performance. Now we have been collecting a bunch of parts to make our installation go…

View Post

Tech

WATCH: How an Air Oil Separator Works and Why You Need One!

Posted on January 7, 2022
byJeff Naeyaert

In this video Mike takes a look at the IAG Air Oil Separator for one of our Subaru projects, explains the difference between an AOS and an oil catch…

View Post

Project GD STI, IAG’s new high capacity EJ Oil Pump!

Posted on November 28, 2021
byMike Kojima

IAG has just dropped their Stage 1 and Stage 2 oil pumps for all EJ engines. We will be using their Stage 2 pump on our own Project GD STI.…

View Post

WATCH: How to Solve Your Subaru Fueling Problems. The Right Way!

Posted on November 19, 2021
byJeff Naeyaert

In this video Mike explains the shortcomings of the stock Subaru fuel system and how to fix it the right way. This fuel system is capable of supporting up…

View Post

WATCH: Fix Subaru Oiling Issues for Good!

Posted on October 22, 2021
byJeff Naeyaert

In this video Mike talks about yet another shortcoming of the Subaru EJ engine and probably the best way to fix it! If you liked the video, please subscribe…

View Post

Solving Subaru EJ Oiling Issues for Good with IAG Performance!

Posted on October 19, 2021
byMike Kojima

Subaru EJ engines are known to have oiling problems caused by the oil pan and pick up. We personally know quite a few people who have lost engines on the…

View Post

Project GD Subaru STI, High Power Fuel System Upgrades!

Posted on October 3, 2021
byMike Kojima

When last tuning our STI with Cobb’s flex-fuel system, we had maxed out our Mass Air Flow Meter, fuel pump and had our injectors going at the maximum duty cycle…

View Post

The Rest of the Engine for Project WRX

Posted on July 25, 2021July 30, 2021
byMike Kojima

We have been getting parts to finish off the engine build on Project GD WRX. If you have been following the project you can check out what we have done…

View Post

Project GD Subaru STI, Building the Engine Part Five: Final Engine Assembly With IAG.

Posted on June 20, 2021
byMike Kojima

In our last story, you saw how IAG Performance assembled our short block with meticulous care. Now our engine travels to the second of IAG’s two cleanrooms for final assembly.…

View Post

Project GD Subaru STI, Building the Engine Part Four: Assembling the Short Block With IAG.

Posted on June 13, 2021
byMike Kojima

If you have been following our EJ257 engine build series with IAG Performance, you have been able to look inside IAG’s incredible attention to detail in machining and parts selection. …

View Post

Project GD Subaru STI: Building the Engine Part Three, Cylinder Head Technology With IAG Performance.

Posted on May 23, 2021June 9, 2021
byMike Kojima

The cylinder head is one of the most important parts when it comes to making power in an engine. Although headwork is less critical in a turbo engine than a…

View Post

Project GD Subaru STI: Building the Engine Part Two, Bottom End Bits With IAG Performance.

Posted on May 2, 2021June 9, 2021
byMike Kojima

In part one of our series of building the motor for Project GD STI we talked about the IAG Performance engine cases we are using and all of the prep…

View Post

Project GD Subaru STI, Building the Engine Part One, Prepping the Case With IAG Performance.

Posted on April 13, 2021June 9, 2021
byMike Kojima

It had to happen eventually. Our Project STI was running great. We had plans to build the engine as our 400 whp was past the limit that a stock bottom…

View Post

SuperPro Suspension Parts joins the Devine Force Racing STi and is put to work at COTA

Posted on March 8, 2020March 9, 2020
byDevin Hofmann

Subarus are known for their competitive advantage of AWD and the ability to always have traction pulling you through the corners. It’s important to note the use of pulling, and…

View Post

StopTech/G-Loc Combo for the Devine Force Racing STi

Posted on November 3, 2019November 3, 2019
byDevin Hofmann

We’ve all been there, that moment coming down a long straightaway, absolutely HAULING FAST as possible, as the unforgiving braking zone approaches. A quick tap to the brake pedal with…