AMS VR38 Alpha 4.0L Pro Edition Crate Engine

Description

Compacted graphite reinforced sleeves fortify the AMS VR38 Alpha Crate Engine 4.0L Pro Edition package. Tailored for Nissan GT-R racing chassis, this stroked 4.0-liter twin-turbo V6 engine generates 1,400 brake horsepower at 7,600 RPM. Increased displacement coupled with custom forged internal components delivers instant low-RPM boost response and uncompromising durability across drag strips and runway sprint events.

Machinists bore and stroke the cast aluminum block using stepped ductile iron cylinder sleeves. A 4340 billet steel stroker crankshaft anchors within six-bolt billet steel main caps. Forged 4340 H-beam connecting rods attach to 95.5 millimeter 2618 forged aluminum pistons through a 92.0 millimeter stroke. A 9.5:1 compression ratio optimizes high-pressure charge air. Wet sump oil volume holds 6.8 quarts, while dry bare engine weight registers at 454 lbs.

Key Features of AMS VR38 4.0L

Motorsport builders buy AMS VR38 4.0L Pro crate engine systems to maximize low-RPM torque while maintaining extreme boost capacity. The long block bolts flush into GT-R engine bays using stock mounting points.

• 92.0 millimeter stroker crankshaft expands displacement to 4.0 liters for quicker turbo spool.
• Ductile iron cylinder sleeves resist catastrophic block cracking under excessive cylinder pressure.
• 2618 forged pistons tolerate extreme combustion temperatures without crown collapse.
• Billet steel main caps eliminate crank girdle flex at high engine speeds.
• Custom ARP 625 head studs clamp heads against high-pressure fire rings.
• CNC-ported cylinder heads flow maximum volume to match increased displacement needs.
• Heavy-duty valve springs halt float at engine speeds up to 8,000 RPM.
• Dynamic balanced VR38 4.0L rotating parts isolate destructive crankshaft vibration.

Dynamic Torque Dyno Verification Curves

Operating between 3,200 and 7,800 RPM, this stroked long block generates 1,400 brake horsepower and 1,050 lb-ft torque on E85 fuel or 110-octane race gasoline. Custom competition camshafts feature 268 degrees duration with 11.0-millimeter valve lift. Manifold vacuum measures 12.5 in-Hg at a 900 RPM idle setting. Hot oil pressure remains firm between 58 to 80 PSI under sustained wide-open acceleration, supplying pressurized lubrication to journal bearings and twin ball-bearing turbochargers during high-stress runway sprints.

Drivetrain Integration Crossmember Clearance Fitment

The engine block connects straight to Nissan GT-R factory all-wheel drive transaxle driveshafts. Internal neutral balancing prevents flexplate deformation under severe torque spikes. Structural motor mounts align with stock subframe holes without cutting. The custom oil sump clears front differential outputs and steering gearboxes without chassis modification.

Break-In Protocol Racing Operating Limits

Prime the lubrication system with high-zinc mineral break-in oil using a pressure tank before initial start-up. Purge trapped air from the cylinder cooling jackets through radiator bleeder screws. This engine is not engineered for raw sea water cooling, boost over 40 PSI on pump gasoline, or unmonitored methanol injection.

• Evacuate initial break-in oil after the first 50 dyno miles.
• Renew competition synthetic motor oil every 1,500 track 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, billet oil pan, timing covers, harmonic damper, spark plugs, dyno test certification sheet, and setup manual. Components ship vacuum-wrapped against moisture during transport.