rb26dett

The RB26DETT engine is a 2.6L Inline-6 engine manufactured by Nissan, for use primarily in the 1989-2002 Nissan Skyline GT-R. The RB26DETT engine block is made from cast iron, and the cylinder head is made from aluminium. The cylinder head contains 24 valves (4 valves per cylinder), and uses a dual overhead camshaft setup. The engine also uses a parallel twin turbo system. The turbo system is arranged so that the front turbo is powered by the front 3 cylinders, and the rear turbo is powered by the rear 3 cylinders. The turbo chargers are of equal size, and are set by the wastegates to limit boost pressure to 14 psi, although the Skyline GT-R has a built in boost restrictor to keep boost under 7 psi.
It is often possible to produce 600hp without modification of the engine internals (by use of larger turbocharger, and either keeping the stock twin turbo arrangement, or using a single turbocharger). With extreme modification, the RB26 motor is capable of power (over 1,340 hp).
There is a common oiling problem with the pre-1992 R32 RB26 motors, as the surface where the crank meets the oil pump was machined too small, eventually leading to oil pump failure at high rpm. This was fixed for later versions of the RB26.
The RB26DETT was used in the following cars:
Nissan Skyline GT-R R32
Nissan Skyline GT-R R33
Nissan Skyline GT-R R34