AMS VR38 Alpha 4.3L Stage 2 Crate Engine

Description

Gain massive displacement and brutal acceleration with the AMS VR38 Alpha Crate Engine 4.3L Stage 2 package. Tailored for heavy-boost Nissan GT-R competition builds, this 4.3-liter stroker V6 engine produces 1,450 brake horsepower at 7,800 RPM. Custom CNC head porting, big-bore sleeves, and reinforced valvetrain components conquer immense cylinder pressures across professional standing-mile and drag racing tracks.

Engine machinists install stepped ductile iron sleeves into the factory cast aluminum block before precision deck leveling. A 4340 billet steel long-stroke crankshaft anchors within cross-bolted billet steel main caps. Forged 4340 H-beam connecting rods mate to 96.0 millimeter 2618 forged aluminum pistons across a 99.0 millimeter stroke. A 9.8:1 compression ratio optimizes high-pressure charge air. Sump capacity measures 6.8 quarts. Long block bare weight registers at 456 lbs.

Key Features of AMS VR38 Stage 2

Professional motorsport teams buy AMS VR38 Stage 2 crate engine units to generate immense torque across broad power bands. Each unit installs flush into R35 front chassis cradles using factory subframe pads.

• 99.0 millimeter billet stroker crank increases displacement to 4.3 liters for instant torque.
• Stepped ductile iron sleeves prevent cylinder bore splitting under severe turbo boost.
• 2618 forged pistons tolerate extreme combustion temperatures without crown distortion.
• Billet steel main caps lock main bearing journals against high-torque flex.
• Custom ARP Age 625 head studs clamp heads against extreme cylinder pressures.
• CNC ported cylinder heads flow maximum volume to oversized intake and exhaust valves.
• High-rate valve springs prevent float past 8,000 RPM competition limits.
• Balanced VR38 Stage 2 rotating parts isolate destructive crankshaft vibration frequencies.

Dynamic Boost Cam Dyno Output

Operating across an expansive 3,000 to 7,800 RPM power band, this racing long block produces 1,450 brake horsepower and 1,120 lb-ft torque on E85 fuel or 110-octane race gas. High-lift competition camshafts deliver 268 degrees duration with 11.0-millimeter valve lift. Manifold vacuum measures 13 in-Hg at an 850 RPM competition idle. Hot engine oil pressure runs between 58 to 80 PSI under hard acceleration, delivering pressurized motor oil to journal bearings and turbocharger center sections under relentless track abuse.

Chassis Mating Drivetrain Clearance Fitment

Engineers designed this block to connect straight to factory Nissan GT-R 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.