Nissan Skyline R32 GTR

When I first bought this car it was completely standard. After driving it around for a while it was obvious that although it was a good car, the standard state of tune was rather restrictive. After investigating the options it became apparent that the sky really was the limit as far as tuning was concerned with these cars. However, a bank balance to match the sky high power was not immediately forthcoming and besides I didn't really want a fire-breathing monster, just a fast road car as Nissan intended before the "Gentleman's agreement" between Japanese manufacturers got involved.
In fact it turned out to be remarkably easy to tune the GTR to a suitable level whilst retaining the majority of the standard engine components. Below are the curves for power, torque, boost level and air/fuel ratio.

There are three traces on each graph. The yellow trace represents the standard car with no modifications. The dark blue trace represents the car after it was fitted with a full HKS Hyper exhaust, Apexi Induction kit, and the boost set to 1 bar through a boost controller. The violet trace represents the car as it is now with the addition of an Apexi Power FC ECU and map.
From the AFR at the bottom it is obvious that the standard ECU gets horribly rich when the boost is wound up.