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Old 08-16-2012, 02:38 AM   #1
Scooby Specialist
Member#: 89752
Join Date: Jun 2005
Chapter/Region: SCIC
Location: On the dyno at Yimi Sport
08 STI

Default Next Gen is here: Full-Race/Borg-Warner EFR7163 in stock location. 440whp/443wtq

Car: 2008 Subaru Impreza WRX STi
Tuner: Me, Paul Leung of YimiSport Tuning
Dyno Info: Dynojet 424X
Ambient Temp: 95*F
Elevation: about 1300' ASL
Transmission: Stock 6MT
Gear: 4th
Peak HP at RPM: 440whp @ 5900rpm (E85). 350whp @ 5900rpm (CA 91 octane)
Peak Torque at RPM: 443ft/lbs @ 3600rpm (E85). 353ft/lbs @3600rpm (CA 91 octane)
Baseline hp/tq for a stock on same dyno: 230HP/255tq - 2008 STi
Target Boost: 25 PSI (E85), 22 PSI (91 Octane)
Target AFR: 12:1 (gasoline scale on E85), 10.9:1 on 91 octane
Fuel: E85 and CA 91 octane pump gas


- Full-Race uppipe and catted downpipe to locate a Borg Warner EFR7163 (2013 release turbo, one of only a handful that have made their way out in to the world) in stock location. Ready to bolt up to all OEM or aftermarket parts that will fit the stock turbo (inlets, TMIC's, FMIC's etc...)
- Fujitsubo Legalis R catback (with the 2.5" taper intact)
- Custom YimiSport 73mm CAI
- Custom YimiSport FPR kit
- APS turbo inlet pipe
- Grimmspeed hybrid EBCS/MBC boost control
- Deatschwerks 1000cc injectors
- Synergy 300lph fuel pump
- Cobb AP

The narrative that no one cares about:

Stock motor (60k miles), stock TMIC and stock exhaust manifold. Basically just enough mods to supply enough fuel, sample the incoming air and get it out the back of the car as quietly and cleanly as possible

Every so often a turbo company introduces a product that "spools like small turbo X, but make power like BIG turbo Y". Physics being the b!tch that it is, has usually proven such claims to be more hype than reality So when Geoff from Full-Race told me about a new turbo that would spool like a turbo 10lbs/min smaller than it's rated flow, my interest was piqued, but my BS meter was similarly pegged. I'll let you guys be the judge, but I think even on my less than fully supported test platform, Borg Warner and Full-Race have come pretty close to their claim.

I have always wanted to have a Subaru that made 500wtq before 4000rpm and still made over 450whp. I'm not quite there yet, but with a couple more bolt-on mods I can easily see it happening even on the stock block. In the mean time, I've been enjoying one hell of a broad powerband and nearly instantaneous boost recover all in a damn near stock appearing package


Dyno Graphs:

Pump and E85

Pump and E85 compared with a typical Stage 2 08+ STI

Damn near stock turbo spool with nearly 200whp more by redline... not too shaby
socalLGT is offline   Reply With Quote

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