AMS Performance VR38 Alpha Pro Series Short Block Engine

Description

Reinforcing compromised aluminum cylinder walls requires the AMS Performance VR38 Alpha Pro Series Short Block Engine and its thick wall ductile iron sleeves. Achieve consistent ring sealing during aggressive half mile top speed runs. This build utilizes an extreme duty forged rotating assembly to manage intense cylinder pressures safely.

Engine Architecture & Core Specifications

• Block Material: OEM cast aluminum VR38DETT, precision line bored and fitted with ductile iron sleeves.
• Cylinder Heads: Built short block only.
• Compression Ratio: Factory 9.0:1 compression maintains off-boost drivability.
• Bore & Stroke: 95.5 mm bore x 88.4 mm stroke (3.8L Displacement).
• Rotating Assembly: Heavy-duty forged aluminum pistons, extreme-duty H-beam connecting rods, and a balanced factory crankshaft.

Component Breakdown: Built Short Block

Fortifying the factory casting involves upgrading the critical rotating mass while replacing standard aluminum walls with highly reinforced iron sleeves.

• Custom aftermarket cylinder sleeves prevent cylinder wall cracking under massive boost pressures associated with large turbo upgrades while high tensile fasteners lock down the main caps.
• Thick forged connecting rods and heavy duty forged pistons prevent catastrophic bending while managing intense cylinder temperatures generated during prolonged track sessions.

Vehicle Fitment & Compatibility Matrix

This sleeved setup integrates flawlessly into the factory chassis by utilizing original mounting points and hardware. Sourcing one of our heavy-duty VR38 replacement blocks provides a turn key foundation for your next high horsepower build.

• Fits 2009-2024 Nissan GT-R Premium editions aligning flawlessly with the factory transmission bellhousing.
• Fits 2012-2024 Nissan GT-R Black editions providing the perfect foundation for upgraded twin turbo setups.
• Fits 2014-2024 Nissan GT-R Track editions dropping directly onto the OEM motor mounts.
• Fits 2015-2024 Nissan GT-R NISMO editions eliminating the need for local machine shop wait times.
• Fits 2024 Nissan GT-R T-Spec editions integrating seamlessly with aftermarket tubular subframes.

Fuel & Ignition System Requirements

Achieving four digit horsepower figures dictates utilizing heavy duty fueling hardware and specialized tuning parameters.

• Complete fuel system upgrades including brushless pumps and massive injectors are necessitated to feed high horsepower targets safely.
• Running E85 is highly recommended for thermal management while utilizing colder spark plugs gapped tightly to ensure consistent ignition.

Installation, Break-In Oil & Priming Instructions

Professional mechanical preparation separates a successful engine build from a catastrophic premature failure.

• Bolt on the factory cylinder heads and turn the engine over with the fuel system disconnected until the oil pressure gauge registers mechanical pressure.
• Add high zinc engine break in oil to the crankcase to properly seat the new piston rings before performing a 500 mile conservative driving break in period.

USA Warranty, Emissions & Logistics

Completing this transaction requires careful coordination of core returns and heavy freight handling.

• Backed by a 1-Year or 12,000-Mile warranty against internal assembly defects this package requires a crack free core exchange to validate the purchase.
• This off road race block is not CARB compliant and delivers via LTL Freight to commercial addresses equipped to offload heavy wooden crates safely.