• Closed loop idle/air speed control functionality
• Uses GM MAP, TPS, coolant sensors
• Speed-density algorithms allow for easy tuning
• Drives eight high impedance injectors
• Advanced transient fuelling algorithms
• Seamless decel fuel cut-off
• Compatible with 1 and 2 BAR MAP sensors

MSD has teamed up with Delphi to make a tunable MEFI4 available to anyone. The Delphi MEFI4 is a bullet proof race proven EFI system that has endured some of the harshest racing conditions in the world. The MEFI4 is not just for racing, many hot rodders love the MEFI4's small size (4 x 4 inches square!) and its ability to be mounted just about anywhere including on the engine!

Included in the package is MSD InGenius tuning software that gives any user full control of the MEFI calibrations. Like other systems, the MEFI4 can be tuned LIVE, so calibration immediately felt while running the engine. The InGenius software takes tuning to a new level of simplicity that includes drop down menus and pictures to identify coils, crankshaft pickup wheels, distributors, etc. Gone are the days of complicated user interfaces that only the software developers know how to operate.

For the techie crowd, the MEFI4 is built on a ceramic substrate circuit board for incredible durability. It uses a bank to bank speed density algorithm for fuelling and is able to close loop on the optional single or dual wide-band oxygen sensors. It has 8 spark drivers, 2 fan drivers, 1 aux output, as well as shift-without-lift capability. The MEFI4 also includes Delphi automotive based diagnostics that can detect problems with any sensor, enable a default mode, and report the specific diagnostic code to the user.

Product Reviews for MSD240001 - MSD