The LS2 was introduced as the Corvette's new base engine for the 2005 model year. It also appeared as the standard powerplant for the 2005-2006 GTO. It produces 400 bhp (300 kW)@6000rpm and 400 lb·ft (542 N·m)@4400rpm from a slightly larger displacement of 5,967 cc (5.967 L; 364.1 cu in). It is similar to the high-performance LS6, but with improved torque throughout the rpm range. The LS2 uses the "243" casting heads used on the LS6 (although without the sodium filled valves), a smaller camshaft, and an additional 18 cubic inches. The compression of the LS2 was also raised to 10.9:1 compared to the LS1s 10.25:1 and the LS6s 10.5:1. The LS2s in the E-series HSVs are modified in Australia to produce 412 bhp (307 kW) and 412 lb·ft (559 N·m). The LS2s in the Chevrolet Trailblazer SS and the Saab 9-7X Aero are rated at 395 bhp (295 kW) (2006–2007) or 390 bhp (290 kW) (2008–2009) and 400 lb·ft (542 N·m) of torque due to a different (sometimes referred to as a "truck") intake manifold that produces more torque at lower RPMs

Features

• ·     Plug and Play control of factory GM 24x and 58x LSx engines
• ·     Internal data-logging standard with a huge 2GB of memory
• ·     4 Stage progressive nitrous control
• ·     Turbo boost control
• ·     Integrated water/methanol injection control
• ·     Self-tuning fuel table strategy greatly simplifies tuning process
• ·     Individual cylinder fuel and spark control allows you to unlock your engine’s potential
• ·     Works with 4, 6, 8 cylinder engines
• ·     Unique lb/hr based fueling strategy greatly simplifies and commonizes tuning
• ·     Advanced idle, closed loop, and enrichment strategies allow for very stable operation
• ·     ECU is fully potted and can be mounted in the engine compartment or interior
• ·     Sealed automotive and marine grade connectors
• ·     Allows for use of common OEM sensors as well as customer sensor calibration input
• ·     1-5 Bar MAP sensor capability
• ·     Two channel knock control sensor Inputs for both one or two wire knock sensors
• ·     Dedicated fuel and oil pressure inputs
• ·     Controls both stepper and PWM Idle Air Control (IAC) motors
• ·     Speed density, Alpha-N, or combination fueling strategies
• ·     4 Programmable high or low Pulse Width Modulated (PWM) outputs and 4 fully configurable inputs can be configured for use
• ·     4 Stage nitrous oxide control
• ·     Fully featured nitrous control eliminates the need for a separate nitrous controller device
• ·     Can be configured “Wet” or “Dry” with closed loop feedback
• ·     Progressive control based on time, RPM, or boost, requires part # 554-111
• ·     Lean or rich safety cutoff
• ·     Full timing retard/control configurability per stage based on RPM or time
• ·     Integrated Water/Methanol injection control
• ·     Uses Holley Water/Meth solenoids specially designed and calibrated for use with this EFI system to allow the user to enter Water/Meth flow as a percentage of fuel injector flow for Water/Meth tubing