Garage99

Displacement is fun. Big turbos are fun. AWD is fun.
Displacement + big turbo + AWD = FUN.


The basics:

• AEM EMS Series 2
• Stock 6G72 3.0L block with forged internals
• Ported stock heads
• Brian Crower 280 cams
• Borg-Warner S400SX3 turbo
• custom manifolds, exhaust, intake, intercooler, and throttle body
• RC 1200cc injectors
• Aeromotive FPR
• E85 fuel
• HKS DLI
• Blitz Dual-SBC Spec-R boost controller
• only 23-24psi… for now

There were no mechanical issues with this car at all, which is always welcome.

Considering the size of the turbo, boost came on at a very reasonable RPM… thanks in part to a device that makes the turbine inlet smaller at low boost levels. Once the turbo was spooled, the boost level was controlled *perfectly* by the Blitz EBC. As the boost was turned up, the car responded very well and power levels continued to rise. Minimal changes in fueling were needed for the additional airflow, thanks in part to the boost compensation mapping in the AEM EMS.

The results:
574.9 hp @ 7500rpm and 477.5 ft-lbs @ 5250rpm

This was a complete build from the ground up, done by Jan and Angel. The car’s previous setup had a Blouch Dominator 1.0 turbo that put down 330whp on the heartbreaker dyno, resulting in a 1/4 mile pass of 11.8 seconds. Of course, the owner still wanted more.

This time around, a custom rotated-mount setup with a large turbo was installed along with a slew of supporting upgrades. The original block was bored over and rebuilt with Eagle rods, CP pistons, ACL race bearings, ARP head studs, and Cometic head gaskets. Killer B Motorsport’s reinforced oil pickup does its part to keep everything properly lubricated.

The basic parts:

• GT3586R turbo with HTA billet compressor wheel and Tial turbine housing
• AEM EMS
• 1200cc injectors
• custom fuel system
• Ported heads
• Brian Crower stage 2 cams
• TurboXS FMIC with custom piping
• GT-Spec header
• TiAL 44mm wastegate

This resulted in a set of strong, but reliable tunes on pump and race gas.


The results:
Pump gas: 392.6 hp @ 6750rpm and 335.5 ft-lbs @ 5750rpm
Race gas: 445.5 hp @ 6750rpm and 377.5 ft-lbs @ 5500rpm


Race gas and pump gas comparison:



Compared to our baseline stock 2006 STi: