Full Specs
Engine - OG Giken RB30 (the real thing)
The normal OS Giken RB spec....
Brand new N1 Block bored & decked to 2998 cc
OS Giken Billet Crank
OS GikenForged Rods & Pistons
OS Giken adjustable pulleys
OS Giken kevlar cam belt
Jun oil pump , Nismo water pump
OS Giken 9 bolt flywheel
OS Giken 3C Triple plate Clutch
Cylinder Head
RB26 Head Gasflowed & ported
HKS step 3 cams
Tomei 1mm oversize valves guide
Tomei
springs buckets
Turbo set up
Borg Warner EFi 8374 with 1.05 housing
6 Boost RB30 specific Twin Schroll manifold
Turbosmart 60mm BOV
Custom pipework with michelob clamps
Fuel System
Protec adjustable brushless in tank pump good for 1000+hp Output controlled via Link ECU so low power drain (unlike traditional pumps)
Larger proline telflon fuel line
Larger Nismo PFR
Racing Lines fuel rail
1000cc injectors
old fuel line now used as second return
Gearbox
All internals are OS Giken
1-5 gearset with closer ratios
OSGiken strenghtened center plate ,
OS Giken larger input shaft
All internals are new & cryo treated and rebuilt
Engine electronics
Link ECU
custom crank trigger set up
NZefi coil pack conversion including mounting plate and custom NZ Efi wiring loom
Coilpacks are similar to R35 so dwell adjusted
Ati high power damper.
Gauges are 60mm apexi EL II - AFR , Oil and Water Temp ,Oil and Fuel pressure and Boost .with adjustable visual and audible warning and can record 30 second playback - Useful for standing quarters
Other engine mods
R31 Finned turbo rocker covers , cam cover
R31 Center plate
Tomei baffle plates and filter
As RB30 is a taller engine without modification there would be a gap between the front covers so the bottom cover has been lenghtened so everything looks stock with no gaps
All covers were then powder coated crackle red
Cooling
HKS 100mm FMIC
Custom pipework with michelob clamps
large capacity 48mm koyo radiator
Custom shrould and mounts for twin electric fans (no space for oem viscous fan )
Custom aluminium ducting from Nismo vent in bumper directly to K & N air filter in engine bay
Exhaust
Custom 3" downpipe,
4" HKS 32GTR Hi power silent modified to fit
Mapping
Mapped by Garth at MGT Racing made 735 hp
Mapped for response so comes on full boost by 4100rpm
Rev limit is set at 8500 rpm OSG motors will safely rev to 9K with the right headwork & supporting mods which have been done.
I have done one 9k run which was "interesting"
Body
Full Nismo Bodykit -
Wider front wings ( MASA )
18" ultralite nurenbergrings with Toyo 888R tyres
Twin sunroofs
Being done at present
Full bare metal respray
Custom meatl rear arches widened to match MASA fronts , custom vented bonnet
There will also be some other custom mods to be revealed when the car is completed
Suspension
Whiteline GTR ARB s (front and rear )
33 GTR Ams and hubs
Adjustable GTR arms with polybushes.
Nismo S Tune suspension
Whiteline subframe and diff poly bushes
AWD System
The car was used as a prototype to find a way of uprating the Attessa system to past 34GTR spec by installing a TSC which allows complete control of lateral movement as well as the normal control of the split to front and rear drive.
Auto stageas do not have lateral sensors like a GTR and the attessa ECU is not therefore equiped to control it. The 34GTR attessa is also much quicker to respond
The upgrade invloved the fitting of the 34 GTR attessa ECU and then providing it with the extra required signals. We used a custom skylab TSC which has much better four way digital sensors.
The ECU need extra feeds for the skylab TSC -from the new digital speed sensors .
The actual sensor input is taken form the feed to the auto snow mode switch which is deleted
The new uprated system means that both the front/rear split and the way the car reacts to sideways movement is adjustable
The set up now reponds quicker than a 34GTR
The system has bee fitted to 2 manually converted stageas in the UK and both still work fine a decade later and give much better handling . But to get the full benefit further changes are essential
Other handling mods
OS Giken torque split LSD to front
GTR diff internals to rear
This meams the car now runs the higher GTR ratio diffs.
Front Kanzai strutbrace
Modified 33 GTR front brace to rear
Brakes
Front 343mm AP Racing Discs with 6 pot calipers
Rear 34 GTR calipers and discs
Uses oem Stagea handbrake
Hel custom braided brake lines
EBC yelloe stuff racing pads front and rear
Tomei brake stopper
ATE super blue brake fluid
Interior
Front seats are Recaros with all the interior retrimned to match . Carpets and plastic trims have also been redone in black.
5 point Takarta racing harnesses connected to custom roll bar.
Battery has been relocated to the rear parcel area in security box with removeable isolator switch
Engine Bay
Both suspension struts have been replaced and the engine bay re painted oem black
Battery has been relocated to the rear parcel area in metal security box with removeable isolator switch.
Custom alloy ducting from the Nismo vent in the front bumper to the K & N filter in the engine bay.