376 WHP @ 18 psi
It's no secret the Subaru WRX would be a hit the second news of its pending arrival on American shores was announced. Heck, we have been clamoring for the, "real deal" for years. And we must say the 2.5RS, the ultimate teaser-rally-bred styling and all-wheel drive, but no turbo under the hood-really hurt.
But it's all good now. We have the Mojo of motordom: turbo power. The WRX dishes out 227 hp at the flywheel and does so through no less than four catalytic converters. Any car with a turbo has a distinct advantage in potential over naturally aspirated and supercharged variants. Savvy enthusiasts know this and have exploited the advantages the WRX brings to the table. Few have exploited better than Earl Mangune, who bought the Scoobie featured here despite working at, of all places, TRD. Not one to let his ride sit idly in stock trim, Earl transformed his WRX into a power monger of the Nth degree.
While this car was part of our "Subaru Invasion" section in the January 2002 issue, it evolved significantly in the power department, styling, suspension, interior-you name it.
An AVO Turboworld turbo upgrade package provides the real mojo. At the heart is a Garrett hybrid ball-bearing turbo. On the intake side of the system are an AVO blow-off valve and air intake kit, high-velocity intake pipe and a trick front-mount intercooler. On the hot side, a set of HKS stainless-steel headers direct exhaust gases to a common collector, then to a Paisley Racing up-pipe and on into the turbine housing. From there, an AVO stainless-steel downpipe evacuates gases via an AVO 3-inch stainless-steel exhaust system.
Odds and ends consist of a Paisley Racing radiator, Zero Sports radiator shroud, GReddy aluminum catch can and an HKS Earth Circle System, which provides ample grounding for heavy-duty electrical needs.
Tuning is attained via a Link Engine Management ECU, which is a Link circuit board swapped in place of the OE motherboard within the factory ECU. The Link board is pre-tuned for added zest and is accessible via laptop for fine-tuning. With the stock injectors and stock fuel pump, the flat four pulled 308 whp on Brainstorm's Dynamic Test Systems four-wheel-drive dyno. An HKS EVC IV controller regulates boost to 8 psi and the Subaru feeds on 91-octane pump gas.
With the stock fuel system maxed out, a set of Blitz 525cc injectors and a Blitz high-flow fuel pump were added. The WRX was taken back to Brainstorm for additional power extraction therapy. Fuel is bliss and the 2.0-liter responded in a big way, spiking the Turbo Mojo Meter by generating 375.9 whp and 296.6 lbs-ft of torque.
Its all-wheel-drive system's agility is an inherent strongpoint for the WRX. Earl expanded this envelope with a myriad of components that work in unison to resist body roll, absorb bumps and carve apexes. The core of the suspension is a set of Tanabe Sustec Pro coil-overs that allow a wide degree of lowering to be dialed in to the Subaru.
The frame structure has been fortified against flex via Cusco front and rear strut tower bars and a Cusco rear triangle bar. The triangle bar mounts in the trunk just behind the rear seat and braces that section off the body by tying together the trunk hinges and floor. To ensure grip at extreme g-loads, Cusco camber adjustment plates allow quick changes for running hard at the track or cruising around town.