Modification
The Skyline GT-R is a popular target for modification due to the
strength of the RB26DETT engine. This engine, common to all GT-Rs,
is widely considered as one of the most durable motors when heavily
modified. Many aftermarket suppliers have produced "bolt on"
upgrade kits for the GT-R to boost power output beyond the factory
specification.
The ceramic turbochargers that are equipped from the factory, are
set to make 7psi of boost pressure (0.5bar). Being ceramic, they
are not as durable as a Steel turbine would be. Most owners limit
their boost to 14psi of boost, as they are prone to shattering at
high heat conditions when past 14 psi. A common upgrade for the
turbocharger is the N1 turbo. It is equpped on the RB26DETT-N1
version of the Skyline GTR engine, intended for motorsports. It is
capable of much higher power than the OEM turbochargers.
Without making upgrades to the mechanical parts of the engine, it
is commonly believed that the engine can handle around 500hp. After
this level of power, it is most important to upgrade the oil system
of the engine. The factory oil-pump is not capable of properly
lubricating the engine at higher power levels. After that, most
owners upgrade the pistons, and connecting rods. As well as the
bolts that secure the cylinder head, and connecting rods.
Some tuning garages in Japan, UK, and Australia, have managed to
upgrade the RB26DETT to power levels past 1000hp. Veilside, in
Japan, has modified an R34 Skyline GTR to 1600hp. They have also
modified an R32 Skyline GTR to accelerate to 300kmh in 13
seconds.
