Big Single Boost
A HKS stainless-steel tubular manifold channels high-enthalpy exhaust gasses into the V-band inlet of the HKS T51R Kai turbocharger. Low-enthalpy exhaust gasses leaving the turbine housing flow through an HKS downpipe and a custom 4-inch titanium exhaust. From the cool side, aluminum piping routes the air charge from the compressor housing outlet to the GReddy Spec-R intercooler. Cooler, denser air leaves the intercooler and makes its way to the Hypertune 90mm throttle body and sheet-metal intake manifold. The larger plenum and straight runners of the Hypertune unit ensure ample and equal distribution of air to each of the cylinders.
An HKS F-CON VPRO orchestrates the six pack of 1,000 cc/min Blitz top-feed injectors while the ignition system energizes the Denso Iridium spark plugs. With the Skyline strapped to the rollers of SP Engineering’s Dynojet dynamometer, SP Engineering’s Hirofumi Kondo refined the fuel and ignition tables. At 25 psi boost pressure, the R32 spun the rollers to the tune of 732 horsepower and 525 lb-ft torque. Compared to a baseline pull of 245 horsepower on this same dyno, the stroked RB delivered a 199-percent increase over stock.
V-band Inlet vs. 4-bolt
The HKS T51R Kai turbocharger features a 99.1mm V-band manifold flange instead of the traditional T4 four-bolt flange. This design not only improves gas flow into the turbine housing by reducing the friction on the walls of the turbine housing, it also offers an additional 30-percent of flow area compared to the four-bolt flange. These features combine to improve the performance and reliability of the turbocharger.
Down Under
Making practically 200-percent more horsepower over stock will tax the capacity of most factory drivetrains. To preempt inevitable failures, an OS Giken R3C triple-plate clutch transfers power to the input shaft of a full OS Giken gear set in the factory transmission case. The reinforced transmission sends power to the front and rear OS Giken Super-Lock differentials that divide power between the BBS LMS wheels. Nitto NT05 tires in a 265/35R18 offering wrap the wheels, providing a solid contact patch at all four corners. To keep the NT05s firmly planted on the streets and highways, Öhlins Flag-R Series adjustable dampers absorb the bumps while Swift springs maintain pressure on the compete NISMO suspension link package.
Freeway Fun
Now that the GT-R is built, Yang could finally enjoy it to the fullest. What he hasn’t mentioned is that the build was also driven by a competitive rivalry to take down his brother’s 700-horsepower Porsche 911 turbo. “My brother always eggs me on about being quicker and faster when we have occasional late night freeway battles. I wanted my R32 to be better than his Porsche. The playing field is now equalized and I can’t wait to take him on. As far as future plans, I may still build an even larger RB30 engine, swap in a six-speed sequential transmission and shoot for 1,000 horsepower. I’m always open to new ways to generate horsepower. I’ve poured a lot into this Skyline GT-R because it is a true California-legal Motorex car and not easy to come by. The extra horsepower just makes it that much more special.” Expect epic battles as the struggle for highway supremacy continues between brothers.
