NRE Inter-Cooled LS Whipple 4.0L 427

Maximum Output: 1,100 HP @ 6,400 RPM

The NRE Inter-Cooled LS Whipple 4.0L 427 is a high-displacement, supercharged LS engine designed to deliver immediate torque with sustained top-end power. Producing up to 1,100 horsepower and 965 lb-ft of torque, this engine features an exceptionally wide torque band, delivering strong response across the entire RPM range.

Despite its output, this engine maintains excellent street manners and is capable of extended-distance driving, while remaining fully capable for track use. Supplied as a complete turn-key package, the engine is dyno tested and calibrated, ready for installation.

Performance Summary

• Displacement: 427 cubic inches

• Induction: Inter-cooled Whipple 4.0L supercharger

• Rated Power: 1,100 HP @ 6,400 RPM

• Rated Torque: 965 lb-ft @ 4,600 RPM

• Throttle Body: 90 mm drive-by-wire

• Configuration: Turn-key, dyno tuned

Engine Specifications

Block & Rotating Assembly

• Block: Dart LS Next

• Crankshaft: Dart billet, 4.0″ stroke

• Connecting Rods: Boost-Line 4340 forged I-beam

• Pistons: JE forged 2618 alloy, 9.0:1 compression

• Piston Rings: Plasma-moly

Valvetrain & Timing

• Camshaft: Custom NRE hydraulic roller

• Lifters: Delphi LS7 hydraulic roller lifters

• Rocker Arms: Bushed LS3

• Pushrods: Manton Series 5

• Timing Chain: Cloyes Z-Chain

• Timing Cover: GM

Cylinder Heads & Sealing

• Cylinder Heads: NRE AFR 260cc LS3

• Configuration: Six-bolt, fully CNC-ported

• Head Gaskets: Cometic MLX

Induction & Fuel System

• Intake System: Whipple supercharger manifold

• Supercharger: Inter-cooled Whipple 4.0L

• Throttle Body: 90 mm drive-by-wire

• Fuel Injectors: Custom flow-matched 1,500 cc

• Fuel Management: Holley Terminator ECU

  • Complete wiring harness and sensors included

Lubrication & Engine Control

• Oil Pan: Holley 302-3

• Harmonic Damper: ATI SFI-certified

• Valve Covers: NRE billet, fully CNC-machined

• Fasteners: ARP throughout

• Ignition System: 60-2 crank trigger

Key Characteristics

• Immediate and sustained torque delivery

• Broad powerband suitable for street and track use

• Inter-cooled supercharger system for consistent intake temperatures

• Fully assembled, dyno verified, installation-ready package

• Built and tested by Nelson Racing Engines (NRE)

Typical Applications

• High-power street vehicles

• Track-focused builds

• Muscle cars and restomod projects

• LS conversion platforms requiring high torque output