This GT-R’s modifications cover the complete powertrain: engine internals, turbochargers, fuel supply, transmission and custom calibration. Factory component reserves are insufficient for this level. Cylinder pressure, heat, fuel demand and driveline torque increase together, so every system was prepared alongside the others.
Engine internals: stronger rods and pistons
The factory VR38DETT is a strong foundation, but increased output raises loads on the rods, pistons and their connections. Rapidly rising torque is particularly demanding; peak power alone does not describe the mechanical load.
We assembled this engine with stronger rods and pistons to provide greater mechanical reserve for its intended load. Assembly quality, operating clearances and precise calibration are equally important.
Tomei camshafts and upgraded valvetrain
Larger turbos supply more air, but the cylinders must admit it and discharge the exhaust. Valve timing, duration and lift matter. Tomei camshafts replace the factory items selected for standard operation.
The complete valvetrain was upgraded. At higher rpm the springs must maintain precise valve motion and return the valves reliably to their seats. Camshafts and supporting components are selected as a matched set.
Twin Garrett 3582 turbos and MAD Sweden intake manifold
Factory turbo airflow does not meet this build’s requirements. Extracting ever more air from a small turbo increases shaft speed, charge temperature and exhaust backpressure, placing a practical limit on simply increasing boost.
We fitted twin full-frame Garrett 3582 turbos, a MAD Sweden intake manifold and custom intake and exhaust pipework. Diameters, transitions and connections were matched to the system’s flow requirements to avoid local restrictions.
„Startlinemotors“ intercooleris
More airflow and boost place greater demands on cooling. Rising intake temperature reduces knock resistance, making stable temperatures important during repeated runs.
This GT-R uses our Startlinemotors intercooler and custom pipework, matched to the Garrett 3582 setup. Cooling and pipework flow capacity were developed alongside the turbos and intake manifold.
Full titanium exhaust
Increased exhaust flow requires greater capacity. Excessive restriction downstream of the turbos impedes exhaust discharge and limits operation under heavy load.
This GT-R received a full, freer-flowing titanium exhaust tailored to the new turbo configuration. Titanium also helps reduce exhaust system weight.
Dual brushless fuel pumps and 12 injectors
Fuel supply is a key limit at this output. Once pumps or injectors reach capacity, there is no reserve to maintain the required fuel delivery under load. E85 requires greater volumetric fuel flow than petrol.
A Startlinemotors dual brushless in-tank pump system and Startlinemotors controller supply 12 injectors. Pump capacity, electrical control and injectors are matched to fuel demand across the intended operating range.
Flex Fuel — management based on actual fuel composition
The Flex Fuel kit measures ethanol content. Changes in the petrol-to-ethanol ratio alter the required fuel quantity and permissible ignition and boost settings.
The EcuTek calibration uses sensor information within the limits defined for this setup, basing engine control on actual fuel composition rather than the fuel’s name alone.
Startlinemotors crankcase ventilation
Increased cylinder load also places greater demands on crankcase ventilation. Ineffective gas evacuation can raise crankcase pressure, while oil mist carried through the system contaminates the intake.
A Startlinemotors catch can separates oil droplets from crankcase gases and helps keep the intake clean.
Dodson Motorsport clutches, gears and strengthened AWD unit
The GR6 is affected by torque, shifts and launch loads as well as power. Insufficient clutch capacity can cause slip and heat, while gears and retaining components must withstand the increased forces.
We fitted Dodson Motorsport clutches, strengthened gears and an upgraded all-wheel-drive unit to prepare the transmission for increased torque and launch loads.
Custom EcuTek calibration
Custom EcuTek calibration brings together the Garrett turbos, upgraded valvetrain, 12-injector fuel system and Flex Fuel hardware.
Fuel delivery, ignition, boost and torque progression are calibrated to use the installed components’ capacity while keeping engine and transmission loads controlled.