Eliminating severe main cap distortion requires the AMS Performance VR38 Alpha 4.0L Stage 2 Crate Engine and its upgraded bearing caps. Ensure absolute bottom-end stability during aggressive drag racing launches. This build utilizes extreme-duty forged internals to handle heavy load without structural compromise.

Engine Architecture & Core Specifications

- Block Material: OEM cast aluminum VR38DETT, precision CNC line bored and fitted with upgraded main bearing caps.
- Cylinder Heads: Assembled short block without cylinder heads.
- Compression Ratio: Retains standard 9.0:1 compression for factory spool characteristics.
- Bore & Stroke: 95.5 mm bore x 93.0 mm stroke (4.0L Stroker).
- Rotating Assembly: Upgraded forged aluminum pistons, extreme-duty connecting rods, and a balanced billet stroker crankshaft.

Component Breakdown: Built Short Block

Fortifying the factory casting involves upgrading the critical rotating mass to handle increased cylinder pressures safely.

- Upgraded heavy duty forged pistons manage intense cylinder temperatures generated by larger aftermarket turbos while strict block cleaning procedures ensure reliable head gasket sealing.
- Thick forged H-beam rods prevent catastrophic bending under heavy torque loads and race calibrated rod bearings provide superior load capacity to protect the bottom end.

Vehicle Fitment & Compatibility Matrix

This short block bolts directly in place of a blown factory engine while retaining all original sensor locations. Installing one of our premium VR38 replacement blocks restores your vehicle’s reliability instantly.

- Fits 2009-2024 Nissan GT-R Premium editions acting as a direct replacement for damaged factory motors.
- Fits 2012-2024 Nissan GT-R Black editions accommodating all OEM factory sensors and accessory drive brackets seamlessly.
- Fits 2014-2024 Nissan GT-R Track editions dropping right into the factory mounting locations.
- Fits 2015-2024 Nissan GT-R NISMO editions requiring a fortified foundation for track abuse.
- Fits 2024 Nissan GT-R T-Spec editions matching the factory driveline perfectly.

Fuel & Ignition System Requirements

Supporting modifications must be calibrated precisely to feed this reinforced engine block efficiently.

- High flow direct injection fuel pumps and upgraded injectors are mandated to prevent catastrophic lean conditions across the RPM band.
- Using 93 Octane pump gas represents the absolute minimum requirement though E85 fuel calibration remains heavily recommended alongside heat range adjusted spark plugs.

Installation, Break-In Oil & Priming Instructions

Executing a flawless installation demands meticulous attention to fluid dynamics and proper heat cycling.

- Assemble the top end strictly utilizing OEM service manual procedures and crank the engine without spark to push oil through the galleys safely.
- Utilize conventional break in oil heavily fortified with ZDDP additives and drive conservatively for 500 miles after the initial twenty minute run in period.

USA Warranty, Emissions & Logistics

Securing this performance upgrade involves a mandatory core exchange and strict adherence to federal emissions regulations.

- A valid core exchange of your original VR38DETT block and crankshaft is mandatory to fulfill this order and qualify for assembly defect guarantees.
- Carrying a Race Use Only designation this crate ships via LTL freight carrier and requires a signature alongside liftgate capabilities upon delivery.