AMS VR38 Alpha 4.0L Race Crate Engine

Description

Conquer half-mile top-speed records using the AMS VR38 Alpha 4.0L Race Crate Engine package. Tailored for unlimited class Nissan GT-R racing programs, this stroked 4.0-liter twin-turbo V6 engine generates 1,600 brake horsepower at 8,000 RPM. Solid ductile iron sleeves, billet main caps, and bespoke valvetrain hardware conquer immense combustion pressures across professional dragstrips and airfield top-speed runways.

Cylinder blocks receive extensive CNC preparation, stepped ductile iron sleeves, and torque-plate diamond honing. A custom 4340 billet steel stroker crankshaft secures within billet steel cross-bolted main caps. Custom 4340 forged steel rods mate with 95.5 millimeter 2618 forged aluminum pistons across a 92.0 millimeter stroke. A 9.8:1 compression ratio handles extreme turbo boost. Sump oil volume totals 7.0 quarts in a dry-sump pan. Bare engine dry weight registers at 458 lbs.

Key Features of AMS VR38 4.0L Race

Championship teams buy AMS VR38 4.0L Race crate engine packages to withstand relentless four-digit horsepower abuse without structural block failure. The long block bolts flush into GT-R chassis using factory mount locations.

• 92.0 millimeter billet stroker crankshaft increases displacement to 4.0 liters for massive torque.
• Stepped ductile iron sleeves eliminate block splitting under extreme cylinder boost pressures.
• Custom 2618 forged pistons tolerate extreme combustion temperatures without crown distortion.
• Billet steel main caps lock the rotating group rigid under massive thrust loads.
• Custom ARP Age 625 head studs clamp cylinder heads against high boost.
• CNC-ported cylinder heads flow maximum air volume into oversized intake valves.
• Competition dual valve springs eliminate valve float up to 8,200 RPM.
• Dynamic balanced VR38 4.0L Race components minimize destructive harmonic vibrations across all speeds.

Extreme Boost Cam Dyno Output

Producing an explosive power band from 3,800 to 8,200 RPM, this competition long block generates 1,600 brake horsepower and 1,150 lb-ft torque on M1 methanol or race fuel. High-lift competition camshafts deliver 272 degrees duration with 11.2-millimeter valve lift to optimize supersonic intake airflow. Manifold vacuum reads 11 in-Hg at a 950 RPM race idle. Hot oil pressure sustains 60 to 85 PSI under full acceleration, lubricating journal bearings and twin billet turbochargers during high-stress half-mile sprint passes.

Chassis Crossmember Drivetrain Fitment Clearances

This racing engine mates straight to reinforced Nissan GT-R all-wheel drive transaxle bellhousings. Internal neutral balancing shields driveline components from destructive crank whip. OEM-spec mounting points drop flush into factory subframes. The race-profile dry-sump oil pan clears front differential driveshafts and steering gearboxes without chassis modifications or crossmember alteration.

Break-In Protocol Competition Operating Limits

Pressurize internal oil passages with high-zinc mineral break-in oil using an external pressure reservoir before initial ignition. Purge trapped air from cooling circuits through top radiator bleeder screws. This engine package is not engineered for pump gasoline below 100-octane under boost, unmonitored nitrous oxide systems, or raw sea water cooling.

• Evacuate initial break-in oil after the first 50 dyno miles.
• Renew competition synthetic motor oil every 500 racing miles.
• Inspect valvetrain lash and spark plug gaps every 12 months.

Warranty Coverage Pallet Crate Manifest

A 12-Month competition limited warranty protects against material and manufacturing defects. The reinforced wooden pallet crate houses the complete long block, dry-sump oil pan, timing covers, harmonic damper, spark plugs, dyno test certification sheet, and race setup manual. Components ship vacuum-wrapped against moisture during transport.