2003 Subaru WRX

Owner: Josh Gould
Dynamometer model: Brainstorm's
Dynamic Test Systems 4WD Dyno

Dyno1
Baseline
Air temp @ 70 Degrees Fahrenheit
Peak HP. 180.2
Peak TQ. 155.2

Baseline Horsepower: 270.5
Baseline Torque: 275.9

Pros
When it comes to the bang for the buck quotient there is no better car than the Subaru WRX. From the factory the Subaru is powered by a potent 227 horsepower engine that delivers every ounce of the power to the tarmac via a 4WD drivetrain. In factory trim the WRX can perform neck snapping launches by propelling itself to 60 mph from a dead stop in 5.3 seconds. Not only does the boxter layout offers excellent weight distribution but it also increases the Subaru's road holding capabilities. It's no wonder why thousands made the trek to their local Subaru dealer to pick one up for themselves.

Cons
Although the engine is rated at 227 horsepower at the flywheel from the factory there is a tremendous loss of horsepower through the WRX's 4WD drivetrain. In factory trim we were only able to register 180.2 horsepower to the wheels, an incredible loss of 46.8 horsepower through the drivetrain! So what better way to make up the loss with performance bolt-ons?

Dyno Notes
Our tester was unfortunately filled to the rim with 87-octane gas. So we had to improvise. After educating the owner about the vehicle requiring 91-octane gas, we made our way to the nearest Autozone to look for some octane booster. We found half a dozen octane boosters that were available but decided to go with NOS Racing Formula.

Dyno2
Turbo XS High Performance Boost
Controller (HPBC)air temp @ 70 Degrees FahrenheitTemperature difference from previous
run: 0 degree FahrenheitPeak HP. 191.4Peak TQ. 161.9