ProSea Airboat LZS450 Engine
At 461.5 horspower, the ProSea LZS450 engine offers a great entry point for most airboat owners looking to upgrade from their dated carbureted engines to modern fuel injection that greatly improves the vessel's gallons per hour consumption rate.
Each Southern Performance System’s ProSea Airboat Engine Package includes all of the engine essentials for your dream airboat. Performance Airboat packages include engine, Starter, Custom-built airboat engine wire harness, electronic accelerator pedal, mass air-flow meter, engine control module, water pump, balancer, and alternator. All harnesses are user friendly with instructions.
Our ProSea engines have become a popular choice within the airboat industry.
Airboat LZS450 Includes:
New LS3 Crate Engine:
LS3 Engine Block - LS3 Intake - LS3 Drive-by-Wire Throttle Body - LS3 Injectors - Fuel Rail (Deadhead) - LS3 Performance Heads - LS3 Camshaft - LS3 Hydraulic Roller Lifters - LS3 - Beehive Valve Springs - Hypereutectic Pistons - Powder Metal Rods - LS3 Crankshaft - Corvette Factory Ignition Coils - Ignition Coil Harnesses - Spark Plugs - Spark Plug Wires - Starter - Air Filter and 4" Tube
Airboat Serpentine Kit:
Alternator - Tensioner - Balancer - Water Pump
Airboat Oil Pan Kit:
6 or 8.5 quart Oil Pan - Oil Pickup Tube - Deflector/Windage Shield - Engine Oil - Oil Filter
GM E38 Based Engine Management System:
Main Engine Harness - Diagnostic Plug w/Check Engine Light - Fan Relay - Fuel Pump Relay and Wire - Fuse Block for Circuit Protection - Tachometer Hookup - ECM with Custom Programming - Airboat Electronic Pedal Assembly - Mass Air Flow Sensor - Oxygen Sensors
Optional Holley Engine Management System:
Main Engine Harness - Terminator ECU (Programmed) - Wide Band Oxygen Sensor - Intake Air Temp Sensor Diagnostic Lights - Tachometer Hookup
MarineMods Gateway:
Includes MarineMod.us CAN-2CAN Gateway protocol translator for powertrain compenents. This gateway translates programming languages from GMLAN and Holley EFI data to NEMA2k marine gauges.
Standard Sensors:
Map Sensor - Crank Sensor - Cam Sensor - Oil Pressure Sensor - Knock Sensors - Water Temperature Sensor
461 Horse Power
**Note on Custom Programming: Our engine packages include files that have been tuned, in a controlled environment, either on an engine dyno or chassis dyno. Due to variations in air intake systems, water temperature, air temperature, exhaust system, and fuel quality, it is recommended to have you finished vehicle fine tuned on a chassis dyno.
*Price Subject to Change.
**Images displayed on this page are general representations and delivered items may feature changes based on availability.
Engine Specs
| Engine Type: | LS-Series Gen IV V8 |
| Block: | Cast Aluminum with 6-bolt, cross-bolted main caps |
| Displacement (cubic inches): | 376ci (6.2L) |
| Bore x Stroke (inches): | 4.065 x 3.622 |
| Crankshaft: | GM Nodular Iron |
| Rods: | GM Powdered Metal |
| Pistons: | GM Hypereutectic Aluminum |
| Camshaft | Stock LS3 Hydraulic Roller |
| Valve Lift: | .551 Intake .522 Exhaust |
| Camshaft Duration (@.050"): | 204 Deg Intake 211 Deg Exhaust |
| Cylinder Heads: | Aluminum LS3/L92-style port, as-cast w/68cc chambers |
| Compression Ratio: | 10.7:1 |
| Valve Size (inches): | 2.165 Intake - Hollow Stem 1.590 Exhaust - Sodium Filled |
| Valve Springs | Beehive Spring |
| Push Rods: | GM Stock |
| Rocker Arm Ratio: | 1.7:1 |
| Oil Pump: | GM Factory |
| Reluctor Wheel: | 58 tooth |
| Throttle Body: | 92mm - Drive by Wire |
| Injector Size: | EV6 42# @58psi |
| Main Bearings: | GM Factory |
| Rod Bearings: | Gm Factory |
| Cam Bearings: | GM Factory |
| Head Gaskets: | GM Factory |
| Head Bolts: | GM Factory |
| Main Bolts: | Gm Factory |
| Rod Bolts: | GM Factory |
| Pedal | Livorsi Electronic Pedal |
| Serpentine Belt Drive: | GM Factory Brackets - Alternator Only Style |
