While working at a fever pitch to reinforce the suspension mounting points and stitch weld the chassis, the mock up engine was removed and sent to SP Engineering located in City of Industry, Calif. The Skyline specialists at SP proceeded to tear down the complete engine, replacing each of the components with only the best products on the market. A 2.8-liter stroker kit ups the ante to a 2771cc displacement while Step 2 (264 lift/duration) HKS camshafts reside on a pair of adjustable sprockets. HKS valves, valve springs and Nismo retainers ensure valve float is eliminated while revving to the tune of 9,000 rpm. Feeding the belly of the beast are twin HKS GT2530 turbines mated to a set of Nissan Genuine N1 Spec exhaust manifolds. In comparison to the standard type manifolds, the N1 Spec retains a factory port job for increased volumetric efficiency.
SP Engineering bolted up a set of Tomei exhaust outlet pipes to discard of the spent exhaust fumes while TEIN and their fabrication shop fabricated a slick 80mm oval style exhaust system that cleverly exits through the side skirt, similar to a JGTC race car. Receiving a full set of Nismo gaskets, the RB26 was balanced, blueprinted, and buttoned up with HKS head studs before being sent back to the TEIN boys in preparation for fabrication of the custom v-mount intercooler setup and intricate fuel system.
Unlatch the quick release pins holding the trunk down and prepare to meet a gambit of steel braided lines, Earl's fittings and numerous pumps. The factory fuel tank remains unscathed for weight distribution purposes but within the outer shell, major modification has been performed. Combining dual Aeromotive fuel pumps, each capable of handling in excess of 1600hp; Earls braided lines siphon fuel though twin Aeromotive fuel filters as it feasts on High Octane VP fuel from the dual Okuyama (Carbing) surge tanks. Fuel is forced through the -8 lines into a HKS fuel rail where Blitz 720cc injectors quench the RB engine's thirst. Sitting just parallel to the fuel pump are a set of twin ARC cooler pumps which aid in keeping the differential and transmission at optimal temperatures at all times. Fabricated on a custom mount, both the trans and diff cooler are connected to the pumps and clustered together in one package. A custom cooling shroud was designed to facilitate cold air from the undercarriage when blasting down the tarmac.
A roll cage is considered an all important safety item for any race or performance vehicle. To call the S15's roll cage a...well... cage is a compete shame. The intricate design and craftsmanship is simply breathtaking and should be considered a work of art. Combining rally style innovation and the traditional circuit racing setup a 20-point chromoly roll cage complete with an impressive 18 gusset setup was TIG welded within the vehicle. The gussets were implemented in fortifying the A-pillar, B-pillar, cross bar, front strut tower, A-pillar to strut, side bar, cross bar, side bar to B-pillar, main hoop gusset to B- pillar, and finally underlying of the main hoop. Although the bars took close to six months of design and fabricate, the finished product was a roll cage that even your grandma would feel safe to ride in when eclipsing speeds in excess of 100mph.
Known as the premiere Japanese suspension company, TEIN spent time and effort in building the Silvia's suspension from the ground up. Rather than overcompensating for the wide fenders using low offset rims, TEIN decided upon building a one-off set of extended upper and lower control arms to stretch the S15's legs to a increased 20mm on all four corners. Custom toe control arms, traction control arms, camber control arms, tie rods and tension rods were specifically designed for the TEIN S15 and delivered to the mainland in record time. "Those cars out there sporting super wide fenders with humungous rims can't be considered a true wide body. They're Fake!" screamed Nakai as he gleamed an evil smile.
A true testament in suspension adjustability, TEIN outfitted the Silvia with a set of their newest Super Racing dampers locked and loaded with an 8kg and 6kg spring rate. Using dual EDFC control unit's, the SRC dampers have the unique ability to custom tailor the rebound and compression setting on the fly depending on vehicle settings and track conditions. For the S15, a custom valving was performed at TEIN USA headquarters with the sole purpose of softening up the SRC system when encountering low speed damping force.
Slated as a dual-purpose machine, the S15 was developed to dominate in both drifting and road racing categories. A winning combination of 18x9.5 Enkei RPF1 rims wrapped in Falken RT615 tires delivers unparalleled traction whether the course demands grip or drift. Unbolt the Nismo lugnuts from the matching extended wheel studs, and experience a braking system worthy of a full-race machine. Emblazoned in a trademark red hue, a set of custom Stoptech 4-piston calipers stuffed with PFC full metallic pads grip the 355mm rotors up front while 2-piston calipers hold onto a set of 328mm rotors in the rear. A Tilton billet remote brake bias adjuster enables the pilot of the vehicle to custom tailor front to rear brake bias with a simple turn of the knob.