Oxymoron a figure of speech in which
apparently contradictory terms appear in conjunction (e.g., sweet agony, jumbo
shrimp, living dead, Hell’s Angels, eco-friendly Nissan RB25).
Up until 1998, the development of Skylines,
typically GT-Rs, was, above all, primarily focused on high performance aspects
and not on ecologically friendly concerns. Adjacently with the release of the
new R34 chassis, a few variations of the new models came equipped with an eco-type
variation of the RB-series engine, called the RB25DET NEO VVL (Nissan Ecology
Oriented Variable Valve Lift & Timing). A potential blasphemy was set loose
in the Skyline devotee crowd, but will Nissan really need a flame suit from all
the scorching condemnation expelled from these purists?
ER34
Nissan Skyline GT-T
Since these “engines” were in principle
classified as the RB25DET, it wasn’t long until it became time-honored as an
ingredient adopted into the extensive encyclopedia of the Skyline tuning
chronicles. The gearheads quickly discovered that the NEO head assembly
consisted of solid tappets rather than the standard hydraulic and included
more aggressive camshafts as well. The intake and exhaust valve timing were
also controlled in parallel rather than sequentially for a flatter and
consistent power-band. This new NEO VVL might seem like Nissan’s archetypal
justification for creating another inline-six turbocharged monster, but in
reality the new design yielded lower emissions and improved fuel economy, which
inarguably complied with Japan’s stringent emission standards.
This is exactly why Cockpit Tatebayashi’s
’02 Nissan Skyline R34 is an exceptional machine. For those who aren’t familiar
with Skylines, the vehicle may come off as an AWD RB26DETT- powered Nissan
flagship vehicle, but on the contrary, it isn’t exactly a GT-R. This is a GT-T,
factory configured as an FR (front engine, rear-wheel drive) vehicle that was
presented upon the automotive world rivaling such equivalents as the JZA80
Toyota Supra and the FD3S Mazda RX-7. In fact, some Nissan purists may actually
be keen on the uniqueness of the FR machine since it gives more direct analog
control of the mechanisms; plus the lightweight features mean less rotating
parts than an AWD. Sure, the R34 GT-R is superior for its generation but keep
in mind that a high-horsepower AWD chassis included more complications in terms
of tuning and driving style, which a large portion of that was relied upon on
onboard computers. The GT-T models were, in fact, very straightforward and
also ranked high up top of the automobile status throne. Simplified, it was
basically a brawny and overpowering version of the Silvia that was ripped with
steroids that instantly made others kneel down just for its notorious spirit.
The sheer power it was capable of and the long wheelbase provided a perfect
candidate for utilization in motorsports such as drifting.
The
R34 GT-R is superior for its generation but keep in mind that a
high-horsepower AWD chassis included more complications in terms of tuning and
driving style
RB-series engine blocks of all generations
and variations were made from heavy-duty Yokohama-bred cast iron. The word over-engineered
comes into play here since these inline-six blocks dished out more than double
the factory output with stock internals. It’s safe to say that this is one of
the last Japanese cast-iron blocks that hit the market, before the rather
emaciated aluminum blocks were incorporated by vehicle manufacturers. Tatebayashi
recorded the machine at 520hp at 7,000 rpm and 416 Ib-ft of torque at 5,893 rpm
with the factory bore and stroke of 2,500 cc. An extensive list of forged
upgrades are expected for these impressive numbers; however, the pistons,
connecting rods, and crankshaft are all bone-stock. The secret to its success
besides the stalwart factory design is Tatebayashi’s profound understanding of
the engine’s weak points, unadulterated capabilities, and catastrophic
limitations. The only mods to the head are the Tomei Powered Poncams, which are
100 percent drop-in and require no cam timing adjustment or ECU tune.
This
is a GT-T, factory configured as an FR (front engine,
rear-wheel drive) vehicle that was presented upon the automotive world rivaling
such equivalents as the JZA80 Toyota supra and the FD3S Mazda RX-7.
The engine internals are factory, but the
surrounding components are something that an untrained eye cannot label,
meaning that Tatebayashi fabricated most of the parts themselves. The surge
tank, or what we call the intake manifold, is an original design right down to
the huge 90mm throttle body. Even the TE06-24V Garrett-based turbocharger,
exhaust manifold, downpipe, and exhaust system are Tatebayashi original units.
A Blitz intercooler was used from a GT-R since the unit has been tried and true
to their past experiences. Sard 550cc fuel injectors, fuel pressure regulator,
fuel rail, and an HKS high-volume fuel pump were incorporated to fulfill the
fuel requirements of the larger turbo upgrade. Okada Projects Plasma Direct
coil packs along with NGK spark plugs contribute to the suck, squish, bang, and
blow of the four-stroke engine. All was topped off with an ECU ROM re-flash
done in house. Tatebayashi could have gone with some fancy stand-alone computer
unit to manage fuel and ignition maps, but they thought the factory ECU was the
most dependable and maintenance free. All this rotational power is translated
by the EXEDY twin-plate clutch system, and back to the rear where the Cusco
Type RS LSD lays down the rubber.
And for the suspension, well, here we go
again. Tatebayashi constructed their own exclusive coilovers using HKS
components as a base. The full height adjustable coilovers are now an industry
standard where the ride height can be changed without touching the spring
preload rate. The typical spring rates that are run on this GT-T are 12kg
front, and 7kg rear, a setup most likely targeted for maximum traction to the
rear wheels. The shock absorbers are a mono-tube design that feature 30 ways of
damper adjustment. This one-off unit has been reviewed and praised by such
big-name GT drivers as Eiji Yamada and Nobuteru Taniguchi, so we know for a
fact that they are spectacular. A burly (and rare) HKS Kansai strut tower bar
is used for the front and a Cusco unit for the rear. Various other ER34 Cusco
blue products flock the vehicle, such as the front and rear camber control
arms. Front and rear ARC sway bars stiffen up the body roll, where in
concurrence the Tatebayshi pillow-ball tension rods tightens up the braking
control and acceleration stability.
2002
ER34 Nissan Skyline GT-T
A full catalog of Endless components were
chosen for the brake department, such as their gargantuan six-pot front and
four-pot rear calipers and rotors. Let’s not forget their stainless steel brake
lines and a factory GT-R master cylinder to aid in the increased brake
pressure.
The body design one way or another exudes
with monkey magic. That’s because the aero kit is from URAS, D1 world champion
Ken Nomura’s company. The wider tread is all because of special GT-R units made
from Nismo, and the under hood temperatures are extracted by the strategically
placed vents from the hood made by Stout. It’s pretty trick the incoming air
from the grille and bumper mouth cools the engine resourcefully, and then the
hot air is exited from the vent. Engine cooling methods with the use of
aerodynamics are a must in these situations since a remarkably large intercooler
is blocking the fresh air path to the radiator. A Sard GT wing sits atop the
rear trunk acting like Buddha’s powerful hands pushing down on the rear tires
when the machine is shooting down the circuit at triple digit speeds. A set of
custom powder coated Rays Gram Lights were pinstriped neon green to match the
canards and make certain accents of the body line pop.
The
body design one way or another exudes with monkey magic.
The interior of the machine is much like a
mullet, where it’s all business up front but the party’s in the back! The front
part of the interior remains normal, with the addition of Bride seats and Defi
gauges littered about, as well as the Blitz D-SBC boost controller neatly
tucked under the kick panel for discretion. The rear is completely gutted and
the seriousness of the machine is glamorously displayed. The steel custom
battery location box had been mounted behind the passenger seat to distribute
the weight evenly throughout the chassis. The Takata Harnesses are mounted to
the chassis and the Cusco Safety 21 roll cage is firmly bolted down along with
aluminum door bars. The roll cage C-pillar cross bracing is just like a
subliminal but obvious rejection to anyone just thinking about sitting in the
rear.
The
interior of the machine is much like a mullet, where it’s all business up front
but the party’s in the back!
Cockpit Tatebayashi can be considered one
of the great entities that changed the stereotypes of ECO engines forever.
However to all fairness, this isn’t exactly an environmentally friendly engine
with the huge snail nestled by the long block, but much respect to Tatebayashi
for maintaining the NEO VVL concept and keeping the factory internals intact.
2002
ER34 Nissan Skyline GT-T
520 HP / 416 LB-FT OF TORQUE
Engine
§
RB25DET NEO VVL engine
§
Tomei in./ex. 260-degree Poncams
§
Tomei 1.8mm metal head gasket; Nismo timing
belt, motor mounts
§
Okada Projects coil packs
§
NGK spark plugs
§
Cockpit Tatebayashi original Intake manifold,
original 90mm throttle body, original exhaust manifold, original TE06H-24v
turbocharger, original exhaust system, original 3-row radiator, original re-flashed
ECU
§
Blitz intercooler, oil cooler
§
A’pexi catalytic converter
§
Sard fuel rail, fuel pressure regulator, 550cc
fuel injectors
§
HKS fuel pump
§
Trust oil filter
Drivetrain
§
Exedy twin-plate clutch system
§
Cusco Type-RS limited-slip differential
Suspension
§
HKS base Cockpit Tatebayashi original suspension
coilovers (front: 12 kg; rear: 7 kg)
§
ARC front and rear sway bar
§
HKS Kansai front strut bar
§
Cusco rear strut bar, front camber control
arms, and rear camber control arms
Wheels/Tires
§
Rays Engineering Gram Lights, Bridgestone
RE-11
Brakes
§
Endless front 6-pot calipers and rotors, rear
4-pot calipers and rotors, steel brake lines, and brake pads
§
Nissan GT-R master cylinder
§
Trust brake fluid
Exterior
§
URAS full aero kit
§
Sard GT wing
§
Nismo GT-R fenders, taillights
§
Stout hood
Interior
§
Defi Link gauges, Bride full bucket seats,
Cusco
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