STI (gen 2) Archives

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.…

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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. …

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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…

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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…

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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…

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Project Subaru GD STI, Improving The Ignition System!

Posted on September 19, 2019September 24, 2019
byMike Kojima

Nowadays it is hard to improve the ignition on late model cars. New car ignitions, especially ones with coil on plug systems are more powerful from the factory than racing…

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The Dreaded Subaru p0011 and p0021 DTC Codes, Don’t Let Them Wreck Your Turbo!

Posted on August 29, 2019December 4, 2019
byMike Kojima

So DO NOT do what we did when our Project GD STI turned on a p0011 OBD DTC code. What we figured was some sort of sensor issue ended up…

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Comparing the Falken RT615 to the RT615K Plus!

Posted on January 22, 2019January 23, 2019
byMike Kojima

The Falken RT615 has always been a good all-around Ultra High Performance dry weather tire with decent durability. Good enough to be daily driven and good enough for the track. The…

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A Fake Stereo Cover For Your Stereo

Posted on September 14, 2018October 9, 2018
byMike Kojima

While we typically focus on performance products, many of us daily drive our cars and enjoy the everyday essentials like your stereo. Like most essential enhancements, we’ve upgraded our Project Subaru WRX STI stock radio to a Pioneer 7-inch double din display. And with any nice stereo comes with the anxiety of getting your car broken into for stereo theft.

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Project GD STI: Making the Front of the Car Stiffer with Ultra Racing

Posted on August 29, 2017July 2, 2018
byMike Kojima

Project GD STI: Making the Front of the Car Stiffer with Ultra Racing by Mike Kojima In the last installment of Project STI, we had greatly increased the chassis…

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Project GD STI: Getting Rid of Chassis Flex with Cusco

Posted on August 25, 2017July 2, 2018
byMike Kojima

Project GD STI: Getting Rid of Chassis Flex with Cusco by Mike Kojima The GD STI/WRX had what was considered to be a very stiff chassis when it was first…

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Project GD STI: Making More Power with Cobb Tuning and Precision Turbo Part 2!

Posted on July 31, 2017July 2, 2018
byMike Kojima

Project GD STI: Making More Power with Cobb Tuning and Precision Turbo Part 2! by Mike Kojima When we last left off with Project GD STI, we had just…

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Testing Radium Engineering’s Advanced Self-Draining Catch Can!

Posted on April 5, 2017July 2, 2018
byMike Kojima

Testing Radium Engineering's Advanced Self-Draining Catch Can! by Mike Kojima Having proper crankcase ventilation is critical on a performance engine, especially forced induction ones that have more blowby past the rings…

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Project GD STI: Getting More Power with Precision Turbo and Cobb Tuning! – Part 1

Posted on December 1, 2015July 2, 2018
byMike Kojima

Project GD STI: Getting More Power with Precision Turbo and Cobb Tuning! – Part 1 by Mike Kojima Our STI has been driving around as a daily for two years…

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Project GD STI – Checking Out The Development of KW’s New 3-Way Adjustable Clubsport Coilovers

Posted on March 5, 2013July 3, 2018
byMike Kojima

Project GD STI- Checking Out The Development of KW's New 3-Way Adjustable Clubsport Coilovers By Mike Kojima A few months ago we visited KW Suspensions' factory in Germany to…

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Project GD STI – Improving the Fuel System with Injector Dynamics and Other Details

Posted on December 9, 2012May 20, 2019
byMike Kojima

Project GD STI – Improving the Fuel System with Injector Dynamics and Other Details By Mike Kojima When we had last left off on Project STI’s engine, we had just…

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Project GD STI- Getting it Slowed Down with Stoptech

Posted on October 29, 2012July 3, 2018
byMike Kojima

Project GD STI- Getting it Slowed Down with Stoptech By Mike Kojima The Subaru GD STI comes with pretty good brakes from the factory, big Brembo 4 piston front and…

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Project GD STI- Keeping Cool with Greddy and Koyo!

Posted on October 1, 2012July 3, 2018
byMike Kojima

Project GD STI- Keeping Cool with Greddy, Cobb and Koyo! By Mike Kojima At this stage in the modding of Project STI's engine, it is time for us to lay…

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Project GD STI- Keeping Cool and Protected with 3M Crystalline Tint and Protective Film

Posted on September 5, 2012July 3, 2018
byMike Kojima

Project GD STI- Keeping Cool and Protected with 3M Crystalline Tint and Protective Film By Mike Kojima Project GD STI is a daily driver that we put a lot of…

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Tested: RS-R’s Ran-Up Oil Treatment, Power in a Bottle

Posted on August 17, 2012July 3, 2018
byMike Kojima

Tested: RSR's Ran Up Oil Treatment, Power in a Bottle By Mike Kojima “Mike, MotoIQ has to try our Ran-Up oil treatment”, RS-R's John Masuda would say to me every…

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Project GD Subaru STI Part Three- Making More Power with Greddy and Cobb Tuning

Posted on August 9, 2012July 3, 2018
byMike Kojima

Project GD Subaru STI Part Three- Making More Power with Greddy and Cobb Tuning By Mike Kojima When we last left off, we had turned our STI into a G…

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Project GD Subaru STI Part Two- Performance Suspension, Wheels and Tires

Posted on July 18, 2012July 3, 2018
byMike Kojima

Project GD Subaru STI Part Two- Performance Suspension, Wheels and Tires By Mike Kojima In the last installment of Project GD Subaru STI, we set about replacing our car’s worn…

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Project GD Subaru STI Part One- Rebuilding the Suspension

Posted on July 3, 2012July 3, 2018
byMike Kojima

Project GD Subaru STI Part One- Rebuilding the Suspension By Mike Kojima The GD Subaru STI is an iconic tuner car. The platform is highly developed and can easily generate…

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Project Subaru WRX STi Part 4: Brake System Upgrades

Posted on October 20, 2010July 3, 2018
byMike Kojima

Project Subaru WRX STi Part 4: Brake System Upgrades By Mike Kojima The old engineers joke that “speed doesn’t kill, rapid deceleration does” applies to all vehicles capable of attaining dangerous velocities. …