Syvecs GM LT4 Plug and Play ECU Kit

£4,150.00 (+VAT)

SKU: S7plus-LT4 Category: Tags: , ,


The Syvecs GM LT4 Plug and Play ECU Kit is based on the on the Syvecs S7Plus ECU. It is suitable for auto transmission (8l90) as well as manual and integrates with all the functions on the LT series engine. It also communicates with the OEM Transmission ECU of the 8l90 in the GM Crate packages to provide enhanced drivability and shifting quality over OEM logics.

The kit includes:

Syvecs GM LT4 Plug and Play ECU Kit Features:

  • Live Tuning of every aspect of the engine’s calibration, including signals sent to the Auto Transmission ECU.
  • Full Direct Injection and Pump Control.
  • Optional 16 Injector Support with 8 x DI Injector and 8 x Port Injectors (Requires X10 or X20 Expander)
  • Option to Remove DI injectors
  • Ability to select desired engine map, boost level, traction and launch control levels through calibration switches or Syvecs TinyDash
  • Fully adjustable Launch control with Anti-lag strategies and Ramp in Maps on Manual Transmissions.
  • Full Variable Valve Timing control.
  • Flex Fuel control option.
  • Cruise Control option.
  • Fully functional with OEM Transmission ECU.
  • Closed loop Dual Lambda Control.
  • Supercharger Bypass Control
  • Fully adjustable closed loop boost control option with launch level adjustments and trims for turbo speed, air charge, engine coolant temp, exhaust gas temperatures etc.
  • Monitor and trimming of exhaust gas temperatures with Syvecs KT8
  • Flat Shift for Manual Transmissions
  • Built in data logging using a market leading analysis software of up to 8 hours, with data rates at up to 1000hz.
  • Rolling Anti-lag / Pit lane limiter strategies, great for building boost on a roll.
  • Anti-theft and valet modes.
  • Super-fast connection via RJ45 Ethernet port for live tuning anywhere in the world or even remotely if on track and connected to a wireless unit.
  • Adjustable traction control strategies based on lateral g and individual wheel speed monitoring.
  • 4 programmable target slip maps. An immediate torque reduction can be applied by the ECU via ignition retard or a fuel cut.
  • Configurable Engine Safety Trips on all important parameters such as oil temperature and oil pressure.
  • Fuel pump control of both main, and sub pumps, as well as relative fuel pressure monitoring and limiting in the event of fuel pressure dropping on boost.
  • 4 different Pedal to Throttle Angle maps with multipliers for different parameters e.g. speed. Again adjustable via steering wheel buttons.
  • Configurable individual cylinder closed loop knock control, to suit any cylinder modification with adjustments to frequency, windows for listening and gains for each cylinder. Ability to trigger full cylinder shutdown in severe knock conditions.
  • Change torque reduction levels on shifts. Essential for very high power applications where the maximum reduction available via the stock ECU is not enough to prevent damage to components.
  • Ability to change Torque ramp in after launch.
  • Run up to 7bar map sensors.
  • Change injector dead times based on voltage levels for proper control.
  • Change injector end angle to ensure injection point is properly calibrated.
  • Ability to fit any type of external sensor to monitor and trigger safety trips from anything such as crank case pressure to damper position.
  • Ability to use any size DBW throttle body e.g. Chevrolet LS7.
  • Wet and Dry – wet and dry nitrous control with ability to drive solenoids directly and control n20 heaters via pressure monitoring.
  • Ability to control any external vehicle features based on sensor inputs e.g. Adjustable rear wing linked to G force or exhaust control valves.
  • Connect any race series dash or even one of our partners’ Touchscreen CANBUS adjustment /display units.
  • View any input live with built in scope up to 1000hz.
  • And much, much more!

FAQ's and Help

  • Q) Do you control the OEM VVT Solenoids?
    • Yes, these are fully adjustable in our SCAL Softer
  • Q) Do you offer GM Cylinder shutdown strategy
    • Syvecs do not support the GM Cylinder shutdown strategy, the control solenoids are not connected
  • Q) If I turbocharge the engine can you control boost solenoid
    • Yes Syvecs have a comprehensive boost control strategy with bank control available
  • Q) Can I install different in tank pump?
    • The Syvecs communicates with the OEM Fuel Pump Ecu to allow PWM control of the pump so it can be adjusted to suit your new pump. This is found in Output Function – Fuel Pump – Fuel Pump PWM.
  • Q) Can I use the OBD port still to log, read codes and clear them on other ECU’s on the car like ABS?
    • Syvecs don’t support the Emission functions and readiness states

All this on top of the usual S7 Plus features.

User manual


GM LT1 & LT4 User Manual v1.1

Estimated dispatch time within 5 working days.

Picture for illustration purposes only. Actual parts may differ slightly in appearance.