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Another EQT Tuned 600whp STI!

Posted by Ed Susman on

This time its a 2005 STI. This car came in with a fresh build that needed to be cleaned up and finalized to make some serious power. We spec'd out some key additional parts, performed the installs, fixed a handful of issues, and proceeded to tune the car on E85. Here is what this build consists of:

IAG Stage 4 Closed Deck Shortblock
Ported heads with oversized valves and BC 280 cams
Perrin Rotated Turbo Kit with GTX3582 turbo
Perrin FMIC
Custom Intake
Tial BOV
Speed Density Kit
Omni 4-bar MAP sensor
Cobb EBCS
Perrin Fuel Rails
Aeromotive FPR
ID2000cc Injectors
Walbro 450lph Fuel Pump with Hardwire
IAG AOS
4 Port Boost Solenoid
EQT Speed Density Custom Tune using Cobb AP V3

Once we got everything sorted, the car ended up with 600whp+ and great drivability and idle that's very rare for a setup like this. The customer was very happy with the results, so we left it there until the next round of mods. This customer is planning on using the car for road course racing, so he will be coming back for a proper surge tank.

Here's the dyno chart on E85 at 33psi peak:


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