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Twin-Turbo 2002 Subaru WRX - Twinning is Winning!

All Aspects Motorsports successfully twin-turbos its WRX project car

Apr 27, 2015
Photographer: Faiz Rahman

"Everyone was saying it wouldn't drive and make power," stated Kienan Weber of All Aspects Motorsports. The man behind the Virginia-based shop has built a wide variety of project cars to his name, from Miatas to Corvettes, but his shop was founded on Subarus and they've been specializing in high-powered Subaru street cars and all-out road racers since their doors opened. This particular bug-eyed 2002 WRX has been campaigned by the shop since '01 and is now owned by customer Eric Hanson. It's gone through many stages, including three different motors, multiple transmissions, and even played on the drag strip regularly. But it gained its glory after Kienan decided to build a WRX like nothing else.

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2002 subaru wrx ej engine Photo 2/44   |   A pair of Garrett GT28RS turbos are used to spool this beast to more than 600 whp on race fuel!

"I kept seeing everyone's turbo setup was the same with big single turbos. I thought if one turbo works, why not two of them! At this time, it was '05 and the Internet was really hitting. We posted photos of the build on the web and it pushed me harder because no one believed it would work," Kienan told us.

Wheel Photo 6/44   |   Wheel

The first goal wasn't to make the most power but just to get the twin-turbo setup running properly. Each turbo is set off two cylinders and both spool at the same time. When all the custom fabrication was done on a JDM 2.0L engine, Kienan sourced cheap eBay turbos for testing. The result was a reliable 400 whp-plenty of all-wheel-drive power for any turbocharged EJ build; however for Kienan, he was going to need more power to really put his shop on the map.

2002 subaru wrx kaminari lip Photo 10/44   |   Twin-Turbo 2002 Subaru WRX - Twinning is Winning!

So a hybrid 2.5L motor was designed using a Darton short-block along with forged pistons and rods. A ported head received aggressive race cams while fueling was beefed up with 1,000cc injectors and twin Walbro fuel pumps. New turbos came way of Garrett GT28RS. All Aspects fabricated and pieced together virtually everything else from the cooling to the plumbing, exhaust, and more. Finally, with tuning done in-house via an AEM standalone, the car dyno'd 620 whp on race gas. For everyday abuse, it stays detuned and makes 461 whp on 93-octane fuel.

Hood Scoop Photo 14/44   |   Hood Scoop

"The turbos hit peak boost at 5,200 rpm. It drives very similar to a big single-turbo car. It wasn't built to be better than any other car, but we simply built to show people, 'Hey, look what we can do. We can do anything to your car,'" Kienan concluded. A project like this is no easy feat by any means, nor will it necessarily build more power than other Subaru builds out there. But it's this type of engineering and out-of-the-box thinking that we can all appreciate and marvel at, whether you believed Kienan could build it or not.

2002 subaru wrx auto power rollcage Photo 18/44   |   Twin-Turbo 2002 Subaru WRX - Twinning is Winning!
Front fender Photo 31/44   |   Front Fender
2002 subaru wrx jdm v8 sti front seats Photo 44/44   |   Twin-Turbo 2002 Subaru WRX - Twinning is Winning!
Sam Du
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767 Articles
Twin-Turbo 2002 Subaru WRX - Twinning is Winning!
Tuning Menu
Owner: Eric Hanson
Hometown: Chesapeake, VA
Occupation: Electronics Technician
Power: 620 whp at 31 psi on race gas; 538 whp at 25 psi on 100-octane; 461 whp at 20 psi on 93-octane
Engine: 2.5L Darton sleeved short-block; 9.5:1 forged pistons; forged rods; black nitrite crank; ported 2.0L heads; 280/280 full race cams; AN fittings; twin Walbro 255lph in-tank fuel pumps; 1,000cc injectors; Perrin fuel rails; L19 head studs; twin Garrett GT28RS turbos; custom front-mount intercoolers, piping, headers dump pipes and downpipe; HKS dual SSQV V1 blow-off valves, Hi-Power 3" exhaust; dual TiAL 38mm wastegates; K&N filters; Samco and HTS couplers; '92-'00 Honda Civic Fluidyne radiator and FAL slim 12" fan
Drivetrain: '04 STI six-speed transmission with DCCD controller; Driveshaft Shop 800hp hybrid rear axles; R180 center differential; Cobb Tuning adjustable short shifter with Prodrive knob; Perrin rear differential cover
Engine Management: AEM standalone ECU; GReddy electronic boost controller
Footwork & Chassis: TEIN HA coilovers with camber plates; Eibach camber bolts; Cusco front upper strut bar and rear three-point brace; welded Auto Power rollcage with front door bars
Brakes: Brembo '04 STi four-pot front calipers; '07 WRX two-pot rear calipers; Kartboy rear caliper adapters; DBA T-Slot rotors; Project MU front pads; Hawk rear pads; Grimmspeed master cylinder solid brace; ABS relocated to passenger fender
Wheels & Tires: 17x9" +35 Rays Engineering 57DR wheels; 235/45R17 Dunlop Direzza ZII tires
Exterior: '06 RS WRB wingless trunk; Kaminari lip with carbon-fiber splitter; carbon-fiber '06/'07 roof spoiler; LNR Enterprises carbon-fiber hood scoop; STI carbon-fiber side marker covers; JDM Impreza badge
Interior: JDM V8 STi steering wheel and front seats; '07 STi rear suede seats; door panels wrapped in blue alcantara; carbon-fiber dash and trim pieces; AEM EUGO digital wideband; Auto Meter carbon-fiber gauges; Optima Red Top battery relocated to trunk in Moroso box with kill switch under rear bumper
WWW: www.allaspectsmotorsports.com

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