Power & Torque 
In standard trim, my car gets just on 100kw at the wheels. With the Unichip aboard, the peak power was lifted to just under 110kw. The power gains across the rpm range were around 6Kw. 

Dyno Plot - Unichip with boost control module 
With the boost control module fitted, the peak power is 105kw. It should be noted, that the boost module was fitted and dyno-ed a month after the Unichip was fitted. As such, the lower power figure seen is simply a function of differing ambient conditions on the day. Note that the power across the lower RPM has now increased to around 10Kw. 

Parameter Snapshot  

Fuel Economy 
A total of 1233km were covered with an average return of 11.31 L/100km. This was better than standard. 

Acceleration Times 

With just the Unichip on board, the car pulled a 5.96sec 0-100km/hr with the 400m coming up in 14.27sec @ 155km/hr. With the additional of the boost controller, these figures dropped to 5.75sec and 14.10sec @ 158km/hr respectively. 

Cold Start Operation 
As this operation is left to the standard ECU, the cold start was perfect and I detected no difference from the standard car. 

Customer Service 
The level of service I received from Peter (and Robbie) over the course of this article was excellent. Peter often went out of his way to minimise the logistical hassles of getting my vehicle out to Bayswater. Both he and Robbie would often stay back late or work weekends in order to tune or dyno the car to suit times around me. Peter also spent countless hours discussing the ins and outs of engine tuning in order to assist with this article.  

Driveability - Standard Boost 
The first thing I noticed with the Unichip was that the throttle response was so much crisper than the standard car. The MY99 WRX turbo kicks in at 2800rpm and below that, acceleration is rather mild to say the least. With the Unichip fitted, the engine response was much stronger at lower revs. Sitting in 4^th gear at 60km/hr equates to about 2000rpm on the rev dial. Squeezing the throttle at this speed provided much more grunt than with the normal car. This extra low down torque was most ideal in traffic.  

I must admit, I didn’t really notice a difference in the mid range urge of the car over the standard. The acceleration figures may prove otherwise but the car felt no faster. The urge past 6000rpm however felt better than standard and the car seemed to pull strongly all the way to the redline. This was my "perception" and interestingly, the dyno plot contradicts this with a steep drop off beyond 6000 (more so than in standard form).  

Driveability - Boost Control Module 
The boost control module is a separate unit that connects to the Unichip. Although the boost is not controllable by the driver, APS can set the max boost to the customer’s desired level. In this case, I went with the standard APS setting which increases boost to a peak of about 17psi at 3000rpm dropping back to factory standard at higher rpm to protect the engine and preserve longevity. 

The extra power the boost module delivers is fantastic. The mid-range torque is amazing and the car just screams all the way to redline. The part throttle response just thrills and is really what makes the Unichip such a goer. You merely need squeeze the throttle to get the car moving. The extra bite offered by the boost module is quite stimulating and feels oh so natural. Subaru should have made the WRX like this from day one.