The Vortec 6000, or LQ4, is a V8 truck engine. Displacement is 6.0 L (~366 cu in) from 101.6 mm bore and 92 mm stroke 4.0 inch bore 3.622 inch stroke . It is an iron/aluminum (1999 & 2000 model year engines had cast iron heads) design and produces 300 horsepower (220 kW) to 325 horsepower (242 kW) and 360 lb·ft (488 N·m) to 370 lb·ft (502 N·m). LQ4s are built in Romulus, Michigan and Silao, Mexico.

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