VEGE DCW2CNG 8.1L 496ci CNG Dedicated Long Block Remanufactured Crate Engine

Description

Featuring 496-cubic-inch gaseous block metallurgy, the VEGE DCW2CNG Remanufactured Crate Engine dedicated long block package provides clean alternative fuel power across an 8.1L platform. Output reaches 315 BHP at 4000 RPM and 430 lb-ft torque at 2600 RPM. Engineered for dedicated natural gas induction, it repowers municipal fleets with durability.

A tall-deck heavy cast iron big block casting features four-bolt main bearing caps, with a 4.25-inch cylinder bore and 4.37-inch stroke. The rotating group incorporates a forged steel crankshaft, forged connecting rods, and specialized high-compression pistons for dry gaseous combustion. Cylinder pressure achieves a 10.5:1 compression ratio for optimized gaseous burn. An 8.0-quart high-capacity steel oil pan maintains continuous oil pickup. Total dry engine weight registers 690 lbs for fleet durability.

Key Features of VEGE DCW2CNG

Municipal fleet transit managers buy VEGE DCW2CNG crate engine packages to recondition dedicated natural gas commercial chassis without high new vehicle costs. Each remanufactured unit receives premium stellite valve seats, hardened exhaust valves, and blueprinted bearing clearances to resist dry gaseous fuel wear.

• 4.25-inch cylinder bores feature diamond plateau honing to seat piston rings fast.
• Dedicated alternative fuel valvetrain components resist extreme dry combustion chamber temperatures.
• Premium stellite valve seat inserts prevent recession during continuous natural gas operation.
• 106cc combustion chambers optimize thermal efficiency when burning compressed natural gas fuel.
• Multi-layer steel head gaskets seal combustion fire rings under high thermal loads.
• Hydraulic roller lifters inside the VEGE DCW2CNG block reduce valvetrain friction.
• Four-bolt main caps anchor the forged steel crankshaft under heavy commercial pulling.
• Deep-sump oil pan ensures adequate lubrication reserves during extended operational shifts.

Combustion Dynamics Dyno Output Specs

The power curve delivers consistent torque output between 800 and 4,400 RPM. Peak dynamometer output reaches 315 brake horsepower at 4,000 RPM alongside 430 lb-ft torque at 2,600 RPM. Camshaft duration measures 204 degrees on intake and 209 degrees on exhaust at 0.050-inch lift, alongside 0.480-inch valve lift. The motor runs on dedicated compressed natural gas or propane fuels. Manifold vacuum measures 19.5 in-Hg at a 650 RPM idle. Operating oil pressure regulates between 40 and 65 PSI at 2,200 working RPM.

Drivetrain Interface Engine Bay Clearance

The rear casing matches standard Chevrolet big-block bellhousing patterns and commercial transmission casings. An internal neutral balance crank flange connects straight to production torque converter flexplates or drive plates. Rigid cast iron mounting brackets align with transit chassis pads, preserving four inches of clearance above the front axle.

Break-In Protocol Maintenance Parameters

Pre-lube all engine oil passages with a pressurized tank before initial startup to protect journal bearings. Fill the crankcase with SAE 15W-40 low-ash natural gas engine oil and bleed trapped air bubbles from heating circuit hoses. This dedicated alternative fuel motor is not engineered for liquid gasoline induction, turbocharger conversions exceeding 6 PSI boost, or unmetered nitrous oxide injection.

• Run motor at 1,800 RPM for 30 minutes under light load to bed in piston rings.
• Drain initial break-in oil and install a fresh oil filter after the first 50 operating hours.
• Replace crankcase motor oil and inspect spark plug gaps every 250 operating hours.

Verified Warranty Physical Crate Manifest

A 12-Month / 2,000-Hour commercial fleet limited warranty provides mechanical protection against manufacturing defects. The reinforced shipping crate contains the remanufactured long block, heavy-duty oil pan, aluminum timing cover, front crank hub, stamped steel valve covers, dynamometer test report, and an equipment setup manual.