Dyno Tune Thursday – 2004 Subaru WRX with a VF48 Upgrade

Here we have a 2004 WRX that we upgraded with a VF48 from a 2009 STi, STi top mount and STi injectors.  This is a nice upgrade for the 2002-2007 WRX models as the stock TD04 turbo is very small and cannot produce much power.

Event: Dyno Tune
Location: Touge Tuning, Mississauga Ontario
Ambient Temp:
Elevation: 249 ft.
Weather: 18C
Car: 2004 Subaru WRX
Tuner: Sasha from OnPoint Dyno
Dyno Info: Dynapack
Transmission: 5-speed
Gear: 4th
Peak HP at RPM: 273 @ 6200RPM – SAE J1349 (2004) Corrected –
Peak Torque at RPM: 255 @ 4600RPM – SAE J1349 (2004) Corrected
Baseline HP/TQ for Stock 2010 STi on same dyno: 228WHP/240WTQ
Target Boost: 18PSI
Fuel: Petro 94

Mod List:
-Catted Turbo-Back Exhaust
-STi Top Mount Upgrade
-STi Injectors
-VF48 Turbo Upgrade
-3-Port EBCS
-Custom Tune by OnPoint Dyno


2 thoughts on “Dyno Tune Thursday – 2004 Subaru WRX with a VF48 Upgrade

  • That’s amazing how much power you guys were able to squeeze out!

    Would the same setup work similarly for an 02-03 WRX?

    – Thanks

    • Yes it would be the same assuming the engine is healthy. It’s easily a gain of 40-50WHP over a Stage 2 WRX with a TD04.


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