ProSea Airboat LZR690 Engine
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 LZR690 Includes:
New LZR690 Crate Engine:
RHS Aluminum Block - LSXR Intake - 102mm Drive-by-Wire Throttle Body - HP Injectors - Billet Fuel Rail w/Regulator - LSX Performance Heads - Comp Cams High Performance Camshaft - HP Hydraulic Roller Lifters - Dual Coil Valve Springs - RaceTec Forged Aluminum Pistons - Callies 4340 H Beam Rods - Callies 4340 Steel Crankshaft - Melling High Volume Oil Pump - Corvette Factory Ignition Coils - Ignition Coil Harnesses - Spark Plugs - Spark Plug Wires - Starter - Air Filter and 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
670 Horse Power
*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: | RHS-LS Series Gen IV |
| Block: | RHS Aluminum w/6-bolt, cross-bolted main caps |
| Displacement (cubic inches): | 427ci (7.0L) |
| Bore x Stroke (inches): | 4.065 x 4.000 |
| Crankshaft: | Callies Forged Compstar |
| Rods: | Callies Forged H-Beam |
| Pistons: | RaceTec 4.125/-6,00cc |
| Camshaft | Comp Cams - Hydraulic - 3-bolt Style |
| Valve Lift (in): | ? Intake ? Exhaust |
| Camshaft Duration (@.050): | ? Deg Intake ? 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 | Comp Cams Dual Springs - Max Lift .675 - 500lbs/in |
| Push Rods: | Comp Cams Hi-tech .105 Wall |
| Rocker Arm Ratio: | 1.7:1 |
| Oil Pump: | Telling High Pressure/High Perfromance |
| Reluctor Wheel: | 58 tooth |
| Throttle Body: | 92mm - Drive by Wire |
| Injector Size: | EV6 42# @58psi |
| Main Bearings: | GM Factory |
| Rod Bearings: | Clevite |
| Cam Bearings: | Clevite |
| Head Gaskets: | Cometic |
| Head Bolts: | ARP Head Bolts |
| Main Bolts: | ARP Main Studs |
| Rod Bolts: | ARP 2000 Rod Bolts |
| Pedal | Livorsi Electronic Pedal |
| Serpentine Belt Drive: | GM Factory Brackets - Alternator Only Style |
