Nissan has an enviable reputation in motorsport which was cemented in the early 90′s with their all conquering R32 GTR. The GTR spawned a league of loyal followers, and became one of the most popular Japanese supercars of the era. While the base car was good, it was what could be extracted out of the stout RB26 that really made this car shine. 1000+ hp was, and still is an achievable target if your wallet was up to the task.
Fast forward a few generations, and the RB26 finally met its demise. While the Skyline might be a thing of the past, the GTR badge however lives on in the shape of the Nissan R35 GTR. Unless you have been living under a rock, none of this should be news to you. What might be surprising though is just how detuned the base GTR really is, and how easily the true performance can be extracted.
We have been lucky enough to have a steady stream of R35 GTR’s through the shop over the last few months, and we were impressed with what could be gained with just a simple tune. Simple probably isn’t quite the word, since Nissan’s GTR is one of the most complex computer controlled systems ever to have four wheels attached. Luckily we have the powerful UpRev tuning package which is designed just for the Nissan platform, and has full support for the GTR.
In stock form the GTR produces around 320-330 kW at the wheels on a lowly 12 psi boost. So what is holding them back? Like most factory tunes, there are three areas strangling performance:
1. A low 12 psi peak factory boost level
2. Overly rich factory mixtures
3. Overly conservative ignition timing
UpRev allows us to tune the factory ECU the same way the engineers at Nissan do. It’s incredibly powerful, providing access to all of the maps for fuel, ignition, boost target, delivered torque and cam control. This lets us optimise the tune quickly and easily. There are no cut wires, the tune can be reverted to factory at any time and best of all you don’t need to purchase any expensive hardware – It all works with your factory ECU.
A few hours on the dyno, and STM’s tuner Chris had totally transformed the power and response of the R35 GTR. Boost was raised to a peak of 16 psi, although it tapers back to around 12 psi at high rpm due to the limits of the factory injectors. The air/fuel ratio, ignition timing and cam timing were also optimised to suit. The result was an amazing 65 kW increase in power at the wheels! Not bad considering the R35 is no slouch in stock trim.
The tune takes Nissan’s R35 GTR from fast to mind numbing, with the heavy weight car now scrabbling for traction from its advanced 4WD system in 1st and 2nd gear. For only $1295, this has got to be one of the best value for money modifications you can make to an R35 GTR!