LHEs (Left Hemisphere Engineering) goal is to make simple engines that are reliable as possible, as modular as able, cheep as conceivable, and ready to run on any form of petrol you stick in them.
[size=150]X4-M/X8-M Gen I E-Series Introduction: 1963 through 1973[/size]
Displacement:
1669cc Single Bank I-Four
3339cc Dual Bank 90 Degree V-Eight
Iron Block/Head Overhead Valve
Cast Crank/Cast Rods/Cast Pistons
Holly Progressive Carburetor @ 14.7:1 AFR
Log Exhaust Manifold
Major Engine Design changes:
1968: Short Cast Manifold to replace restrictive Log manifold.
[size=150]X4-M/X8-M Gen II E-Series Introduction: 1974 through 1999[/size]
1974: Redesigned Aluminum Block/Head to save weight.
1974: Two-Way Catalytic converter added for emissions.
1974: Hypereutectic Pistons replaces Cast pistons for emissions.
1974: Three-Way Catalytic converter upgrade.
1985: Multi-Port Fuel injection Standard + High Flow Three-Way Catalytic converter.
[size=150]X4-M/X8-M P-Series Introduction: 1963 through 1973[/size]
Displacement:
1893cc Single Bank I-Four
3787cc Dual Bank 90 Degree V-Eight
Iron Block/Head Overhead Valve With enlarged ports and roller valvetrain
Cast Crank/Cast Rods/Cast Pistons
Holly Progressive Carburetor @ 13.0:1 AFR
Short Cast Exhaust Manifold
1968: Tubular Exhaust Manifold replaces Short Cast.
The Second Engine family developed by LHE, the Ti-SX Modular ‘Big Block’
[size=150]SX4-M/SX8-M E-Series Introduction: 1974[/size]
Displacement:
2430cc Single Bank I-Four
4859cc Dual Bank 90 Degree V-Eight
Aluminum Block/Head SOHC Triple Valve
Cast Crank/Cast Rods/Cast Pistons
Holly Progressive Carburetor @ 14.7:1 AFR
Short Cast Exhaust Manifold
Major Engine Design changes.
1975: Two-Way Catalytic converter added for emissions.
1977: Hypereutectic Pistons replaces Cast pistons for emissions.
1980: Mechanical Fuel injection Optional.
1981: Three-Way Catalytic converter upgrade for improved performance.
1990: Single Port Injection listed as standard equipment. + High Flow Three-Way Catalytic converter upgrade for improved performance.
1995: VVL/VVT Introduced. + Multiport Fuel Injection replaces Single Port.
2014: Direct Injection listed as standard equipment.
[size=150]SX4-M/SX8-M P-Series Introduction: 1974[/size]
Displacement:
2709cc Single Bank I-Four
5418cc Dual Bank 90 Degree V-Eight
Aluminum Block/Head SOHC Triple Valve
Forged Crank/I-Beam Rods/Forged Pistons
Holly Progressive Carburetor @ 13.5:1 AFR
Tubular Exhaust Manifold
Major Engine Designe changes.
1974: Mechanical Fuel injection Optional.
1975: Two-Way Catalytic converter added for emissions.
1981: Three-Way Catalytic converter upgrade for improved performance.
1988: Single Port Injection becomes standard equipment.
1990: High Flow Three-Way Catalytic converter upgrade for improved performance.
1990: Lightweight Forged Pistons replace Forged Pistons.
1992: VVL/VVT Introduced
1994: Sequential Multiport Fuel Injection replaces Single Port.
2014: Direct Injection listed as standard equipment.