Isnt that one of the early ones that people were trying to tinker with?
There is a company in America that has cracked the "un-Tuneable" ECU and apparently have a GT-R running at nearly 800whp and 754lb/ft
But they have uprated a lot of internals as well to cope.
Only took them 2 years to crack it
.
Apparently there is an ECU within the ECU and they both share the running of the car. The Inner ECU apparently being a bitch to crack. You also have to simultaneously map both ECU's or it FUBAR's
Imagine trying to explain that to the dealer
Edit found them - they are called COBB Tuning
COBB Tuning Time Attack GT-R So you could spend the £60k you save over the Turbo S and have this instead