What’s Happening at Garrett -
08/02/2019

One Fast Lap: Racing The Clock In Time Attack

One Fast Lap: Racing The Clock With The RS Motors Time Attack Racing Team

This car is built for one thing- Time Attack Racing. Time Attack is all about that ONE fast lap. The entire build strategy is set around that one lap. The Goal is to go after track lap records. Specifically, production type car lap records. To achieve this, some serious horse power is needed. Picking the correct turbo for our engine package is key. It’s not about peak horse power, but usable power with a wide powerband.

About The Car

It’s a 2006 Mitsubishi Evo IX with a 2.2L engine paired and a Drenthe SEQ transmission. We went with a 2.2L for a little more displacement while keeping piston speeds low. This gives us a nice long rev range. Choosing a turbo can be challenging and confusing and you can study compressor maps all day to make your best educated guess, but in the end, there is nothing more effective than a dyno to measure the real performance of an engine. At RS Motors we’re lucky to have our own in-house dyno and had the opportunity to test a few different Garrett turbo options. We’ve tested the GTX3076R Gen II, GTX3576R Gen II, and GTX3582R Gen II Garret Turbos.

When Garrett announced they were going to produce a reverse rotation turbo, we were excited. If you don’t know, Evo 8/9 turbos spin counterclockwise and have the compressor outlet on the left side of the turbo. The Garrett reverse rotation turbos were able to fit into the OEM package. We had our friends at FobiaFab fabricate a manifold that would keep the turbo as close to the engine as possible while keeping serviceability in mind. All V-Band connections were used for the turbo, wastegate, and downpipe. This means no need for gaskets and vibrating bolts loosening up. Reliability, serviceability, and performance are all things to consider. We also want the ability to swap turbos at the track if desired because some tracks have longer straights and can require more power while some smaller/tighter tracks require better spool to get in and out of the turns.

Remember, its not about peak power, but USABLE power.

The turbo we tend to run most is the Garrett GTX3582R Gen II reverse rotation. It delivered 687whp and 531wtq at 36 psi,  the most power from anything we’ve ever tested. Let’s let the dyno graph do the talking. We have over 30 psi of boost from 5000 RPMS all the way past 9000 RPM. For smaller, tighter tracks we use the GTX3076R  Gen II turbo to produce quicker power but peaks out at 530whp on the same engine package.

Track Results

Let’s go beyond the dyno and to the track, the real test. While this car is pushed to the bleeding edge of performance, it still needs to withstand the abuse for a full lap. Some compare Time Attack to a series of drag races, separated with turns. While its not exactly that, the engine does go through several back to back pulls. Heat is the enemy here and keeping everything within operating temp is vital to engine health. This is where data logging can become very beneficial. With data we’ll keep an eye on everything from, coolant temps, intake temps, oil temps, boost levels, AFR’s, plus much more. After a few test laps and everything looks good, we toss on the sticky tires, flip the A-Game switch on and go for it.

To this day, we’ve NEVER had a problem with our Garrett turbos.

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