8.1L

  • Type: 90° 8.1L V8
  • Displacement: 496 cid (8127 cc)
  • Compression Ratio: 9.1:1
  • Valve Configuration: Pushrod Actuated Overhead Canted Valves
  • Manufactured: Tonawanda, New York
  • Valve Lifters: Hydraulic Roller
  • Bore X Stroke: 4.25 x 4.37 in (107.95 mm x 111 mm)
  • Main Bearing Caps: 4-Bolt Cast Iron
  • Balance Method: Internal
  • Intake Manifold: Factory-Installed Alternate Fuel Manifold
  • Fuel Delivery: LPG/NG Electronic Mixer
  • Oil Pan Capacity: 8 qt
  • Fuel Types: NG / LPG
  • Engine Rotation: Clockwise (from the front)
  • Paint Protection: Component Painted
  • Horsepower: 264 hp @ 3000 rpm (Propane), 240 hp @ 3000 rpm (Natural Gas)
  • Torque: 462 lb-ft @ 3000 rpm (Propane), 417 lb-ft @ 3000 rpm (Natural Gas)
  • Shipping Weight: 729 lb (307.49 kg)
  • Coil-near-plug ignition includes crankshaft sensor, camshaft sensor and eight ignition coils.
  • Cylinder head features high-flow replicated ports and sintered powder metal exhaust valve seat inserts for durability.
  • Industrial torsional damper with integral six-rib pulley to accommodate serpentine accessory drive hardware.
  • Sintered-powder metal exhaust valve seat facing for better valve durability with alternative fuel applications.
  • High torque camshaft with hydraulic roller valve lifters provides maximum performance.
  • Positive Crankcase Ventilation (PCV) system is integral to intake manifold (no valve required).
  • Coated cast aluminum 8-quart oil pan with full baffle and 12-mm drain plugs on port and starboard sides.
  • Industrial external water crossover.
  • Coated, flat top hypereutectic cast aluminum pistons.
  • Engine block quick-connect oil fittings for easy assembly of oil coolers or remote oil systems.

Feature Focus

  • The coil-near-plug ignition system, with both crankshaft sensor and camshaft sensor, is another example of exclusive PSI technology

 

Materials

  • Block: Cast Iron
  • Cylinder Head: Cast Iron
  • Intake Manifold: One-Piece Cast Aluminum
  • Crankshaft: High-Density Nodular Iron (with undercut and rolled fillets)
  • Pistons: Hypereutectic Cast Aluminum
  • Exhaust Seat: Sintered powder metal exhaust valve seat inserts)
  • Gaskets: Multi-layer stainless steel

 

Fuel System Features

  • Closed-Loop Fuel System Kit
  • Dual Fuel
  • LPG (Mixer, Throttle Body, Fuel Lock, Regulator)
  • LPG w/Elec. Governor
  • LPG Electronic Mixer
  • NG/LPG Carb Dual Fuel
  • NG Electronic Mixer
  • NG (Mixer, Throttle Body & Air Cleaner)
  • NG w/Elec. Governor
  • Three Way Catalyst standard