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Old 11-19-2015, 09:53 AM   #1
Motion Lab Tuning
Member#: 228856
Join Date: Nov 2009
Chapter/Region: South East
Location: AEM Infinity Trained
Default Motion Lab Tuned 2007STi 703WHP/633WTQ Full race EFR8374 on E85 @ 37PSI

Shop: Motion Lab Tuning
Dyno Type: DynoCom FX5000-AWD
Temp: 62F
Boost: 37.5PSI
Fuel: E82
Target AFR: 12:1
SAE Corrections: Default Corrections
Peak HP at RPM: 703whp @ 6750RPMs
Peak Torque at RPM: 633wtq @ 5650RPMs
Transmission: OEM STi 6-speed transmission
Gear: 4th
Engine Management: Cobb v3 AP SD software

Engine/Power Modifications:
  • CP 9:1CR Pistons
  • Manley TurboTuff rods
  • Standard 11mm ARP Head stud kit
  • Stock cams
  • GSC Valves
  • GSC Valve springs
  • Full Race twin scroll EFR8374 Turbo kit
  • Perrin Intercooler kit
  • ID2000 injectors
  • Walbro 485 fuel pump (hardwired) and -6AN feed line from the tank
  • Aeromotive fuel rails and -8AN hoses
  • NGK 1-step colder plugs
  • Cobb Tuning 3port EBCS
  • IAG TGV deletes
  • Cobb Tuning v3 Accessport
  • IAG Competition AOS
  • Omni Power 4BAR MAP sensor

This was a 2007 STI limited we wrapped up the other day after working with him on some fuel system upgrades and some custom dyno tuning. The old fuel system was using an Agency power fuel rail kit and a generic 300LPH fuel pump. It just wasn't up to the task of what the EFR8374 could do, and it was showing an extremely lean AFR up-top as is so it was time to make something happen. We built a fuel system with a hardwired Walbro 485 pump in the tank, -6AN feed hose, -8AN hoses under the hood, and Aeromotive fuel rails and FPR. That increased his headroom drastically.

From there it was time to hit the rollers. We had some E85 (tested at 82% ethanol) waiting for it and this turbo definitely responded fantastic to the extra boost. We eventually got to the limit of fuel that our -6AN line and fuel pump were able to supply but were very pleased with the results all said and done.

Final HP/TQ with Boost graph:

Follow whats going on at the shop on our Facebook page Motion Lab Tuning - Automotive - Charlotte, NC | Facebook

Thanks for looking!
Alex Goodwin
[email protected]
MotionLabTuning.com - Engineering Performance
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