visual assault / DSG RASpec Impreza 2.0


About the Car

The goal I established for the RASpec Impreza was a cross-campaign race car capable of competing in time attack, time trial, hillclimb and wheel-to-wheel racing series up and down the East Coast.

RASpec Impreza 2.0

The car is a 2002 Subaru WRX “bugeye” chassis purchased in 2011 and fully restored from 2013 to 2015. The car was built by DENT Sport Garage and German Performance Service in Massachusetts.

Video

RASpec Impreza 1.0 at Carolina Motorsports Park, SC. Redline Time Attack. Video captures engine sound at wide open throttle.
James Elterman and the Takata Impreza in chase of the RASpec Impreza 1.0 during Sunday morning practice at Redline Time Attack at Englishtown Raceway. Video by James Elterman.

Chassis

The chassis is a 2002 model year, GDA/B code VIN #JF1GD29642G507991

The restoration began with a complete tear-down. Everything not welded to the chassis was removed, tagged and inspected. Anything not required for racing such as the interior and OEM suspension was sold. Anything worn was cataloged, and new factory OEM replacements were ordered (such as chassis gommets and rubber window seals). The paint and rubberized under-body weatherproofing was removed by media-blasting and sanding. Next the chassis was fully seam-welded. Finally the roll cage was built and the car was freshly painted white.

Chassis underbody, during restoration, seam-weld and painting after media-blast.

Engine

The RASpec Impreza engine is a JDM EJ207 WRX STI 2-liter engine running the Tomei 2.2l stroker kit. The Tomei 2.2l stroker kit was chosen as it is complete with pistons, rods and the lightened, custom journaled crankshaft. The heads are sourced from a JDM Spec-C WRX STI that come from the factory with larger ports, and factory polished.

Engine bay.

The engine was built to tolerances provided by the team running the Cusco / Tomei / Voltex Time Attack Impreza as they use the same engine stroker kit.

The intake side has a custom fabricated front mounted intercooler (design is inspired by the Subaru Impreza WRC S10 design) pressurized by a Garrett GT3076R turbo using a TiAL GT30 turbine housing to feed the reverse mounted JDM STI intake manifold (no TGVs).

Engine intake and turbo. Intercooler detail.

The turbo wastegate is a TiAL MR-R 44mm. The turbo uses the TiAL V-Band Clamp and Flange System to allow full 306 degree rotation for optimal turbo positioning. Put simply: “Its dope as fuck”.

Garett GT3076r and TiAL turbine housing with v-band clamp. TiAL wastegate.
Mocal oil cooler setup (left), mounted in the front of the car. Front mounted intercooler and radiator also visible (right).

Transmission

Suspension

Stance GR+ adjustable coilovers with external resovoirs.
Cusco 3-way adjustable rear sway bar on anodized Pillowball endlinks. All hardware and mounts are new. Wheel studs are the long-type.

Fuel

SARD fuel surge tank located in the trunk.

Electronics

Exterior

The exterior is stock, with a few OEM components. The front bumper is running the “Double Lip Combo” setup. The upper is the 2002 Prodrive V2 lip and the lower is the 2006-2007 V-Limited lip.

Exterior photos.

Interior

The interior is fairly spartan and without adornment. Only the essentials.

Driver side interior view.
Passenger-side x-brace rollcage. Window safety net on driver side.
Shifter linkage. Dash controls. Defi gauge pod. Battery and emergency cutoff switch.
Beat Rush trunk bulkhead panel.

Spare Package

The car comes with additional spares, hardware and accessories.

Spare hardware. Spare (new) Performance Friction rotors.

History

The first race car I built with the name “RASpec Impreza 1.0” began in 2004 when I started a thread on NASIOC asking for advice about building a race car. I just just recently upgraded from a 2001 Impreza 2.5RS to the 2004 “blobeye” WRX. Shortly after I signed up for my first track event with the BMW-CCA and was totally addicted to track events. A month later I caged my car and began its migration from a humble street car to a battle-tested time attack machine. The full history of the build process is available on NASIOC.

The "RASpec Impreza 1.0" racing at Summit Point in the Redline Time Attack series, 2010.

I raced the RASpec 1.0 at COM Time Trial events, the Redline Time Attack series, the BMW Sports Car Club track events, and New England Hillclimb series.

A crash at a New England Hillclimb Race Series in 2010 ended the useable life of the “RASpec Impreza 1.0”, and I began searching for a “bugeye” Impreza to use as a new chassis for the “2.0” version of the RASpec Impreza.

In 2011 I found a “bugeye” WRX that would serve as the perfect base for a new race car. The bugeye was parted-out and stripped, and the build of my second race car began. It was only fitting that it be called the “RASpec Impreza 2.0”.

The key features of the 2.0 version that were improvements over the 1.0 version were as follows:

The resulting product of the build is a car that is lighter, faster and easier to maintain than the first race car. The “RASpec Impreza 2.0” is a better overall car, it takes the best aspects of the 1.0 and simplifies until there is nothing else to take away— creating a minimalist race-ready track platform.

FAQ - Frequently Asked Questions