3D Printing an Oil Cooler Duct With BD Engineering
With a huge heatwave hitting California, we found when doing a track day at Willow Springs raceway in over 100-degree heat that our car was starting to run a little…
Project GD STI, Adding an Intercooler Sprayer to a Front Mount Intercooler
Subaru STIs have a water intercooler sprayer as factory equipment. There is an intercooler spray button on the dash with a large water reservoir in the truck with a pump. …
Project GD STI We Don’t Need a Damn Rotated Mount Turbo
So with our last go around of Project GD STI we had reached our goal of 500 wheel hp but we were not entirely pleased with our powerband. Our power…
Project GD STI, Our Custom Stoptech Big Rear Brake Kit Comes Together!
In our last segment, we talked about the lack of rear brake upgrades for the GD and why it was difficult to design one. We started out with a Stoptech…
Project GD STI, Designing a Stoptech Rear big brake kit with BD Engineering
We had always wanted to upgrade the rear brakes on Project GD STI but were not able to do it. Nobody made a quality rear brake upgrade for the car.…
Project GD STI, Installing an Upgraded Precision Ball Bearing Drop In Turbo and Larger Injector Dynamics Injectors
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…
Improving Shift Feel with Cobb Tunings Weighted Shift Knob
Our Project GD STI has been running a Cobb Tuning short shifter and we really like it. We have it adjusted so the throws are not Syncro crunching short and…
Project GD STI, Improving the Powerband with Precision Turbo and Injector Dynamics
Previously we had dyno tested and tuned Project STI at Church Automotive testing. Although our car made a pretty impressive 501 whp and 487 lb/ft of torque our power peaked…
Project GD STI, Updating the Telematics with Sony
When Project STI was sitting idle for a few months while we were assembling and installing the new motor our Pioneer double DIN audio system died. When doing research to…
Onsite Wheels Fixes Project GD STI’s Wheels
So seconds after lecturing my daughter about curbing wheels I did this… It looks like another job for Onsite Wheels. Onsite Wheels had previously fixed the wheels on our Project…
The Mystery of the Round Subaru Radiator Cap
Having an incorrect radiator cap on a turbo EJ Subaru is a critical mistake that even seasoned Subaru builders, including us have made. In fact, one of our sharp-eyed readers…
Project GD STI, Dyno Tuning for Big Power with Reliability
Well, it’s finally time to get Project STI started and tuned. As with many of our projects, we enlisted the help of Shawn Church of Church Automotive Testing to get…
Rodger Clark Motorsports Subaru EJ Low Temperature Opening Thermostat
We had noticed that the coolant temperature of Project STI was pretty hot considering that the car had a big CSF radiator and a Greddy oil cooler, in fact, the…
Project GD STI, Fixing all the Details!
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…
IAG’s New Easy Plug and Play Drive By Wire Big Throttle Body for the EJ257.
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…
Project GD STI, Out with the Old and in with the New!
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,…
WATCH: Subaru Engine Swap Must Have Parts!
If you’re building a high performance Subaru engine there’s a lot of parts and accessories to consider buying or upgrading while you’re in there. In this video Mike explains…
Nightmotorsport Air Oil Separating Billet Valve Covers for Subaru EJ Engines
Subarus like all flat engines, blow a lot of oil out of the crankcase in their blowby gasses. This is always a problem with performance flat engines like Porsche or…
Freeing up the EJ257 Intake Flow with Process West and IAG
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…
Cutting Big Weight From Project STI With AntiGravity Batteries and MeleDesign Firm
While we are going through Project GD STI, repowering it and upgrading many of its systems, we thought it would be nice to replace the car’s heavy AGM battery with…
Project GD STI, Getting Ready For the Engine Swap
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…
Project GD STI, IAG’s new high capacity EJ Oil Pump!
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.…
WATCH: How to Solve Your Subaru Fueling Problems. The Right Way!
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…
WATCH: Fix Subaru Oiling Issues for Good!
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…
Solving Subaru EJ Oiling Issues for Good with IAG Performance!
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…
WATCH: The Best Clutch Money Can Buy? XClutch Twin Disc
We recently noticed a new clutch brand to us that’s been gaining popularity in the time attack crowd. In this video Mike takes a look at the XClutch twin…
Project GD Subaru STI, High Power Fuel System Upgrades!
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…
Project GD Subaru STI, Checking out the Ultimate Streetable Clutch with XClutch.
With our killer engine by IAG now sitting in our shop, it was time to start gathering the peripheral components needed to support our new motor. The next thing absolutely…
Project GD Subaru STI, Building the Engine Part Five: Final Engine Assembly With IAG.
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.…
Project GD Subaru STI, Building the Engine Part Four: Assembling the Short Block With IAG.
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. …
Project GD Subaru STI: Building the Engine Part Three, Cylinder Head Technology With IAG Performance.
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…
Project GD Subaru STI: Building the Engine Part Two, Bottom End Bits With IAG Performance.
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…