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MSD Ignition New Atomic EFI for the LS Engine

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MSD ignition takes the fear of EFI wiring out of LS engine swaps with its new Atomic LS EFI swap kit. Winning SEMA’s Best new product in the Street Car/Custom Car category, the Atomic LS EFI should be as popular as the original Atomic EFI kit.


Like the original Atomic EFI systems, The Atomic EFI LS systems have a compact Power Module that links the ECU to the electric fuel pump, electric fans, and oxygen sensor, plus connections for power and the Handheld Programmer. To set up the system, simply plug the Programmer into the Power Module and toggle through the menu screens with the joystick. Scroll up and down through a few easy parameters and your engine will be running in no time. The Handheld can be unplugged and stowed away, or left connected to view a list of functions in real time as the engine runs.

MSD has a variety of advanced features that are accessible through the Handheld Programmer: 

  • Compatible with forced induction
  • Nitrous input for spark retard and nitrous A/F targets
  • Program different temperatures to activate two cooling fans
  • Advance or retard ignition timing up to 10° over the factory setting
  • Select a rev limit through fuel and/or ignition cut-off
  • Compatible with OE Variable Cam Timing Control
  • Built in 2-Step launch control

The MSD Atomic EFI LS systems work with return-style or returnless fuel systems, accept mechanical or electronic throttle controls, and automatically recognize 24- or 58-tooth crank trigger wheels. The Master Kits include the fuel rail assemblies with electronics, fuel injectors, wiring harness, Power Module, Handheld Programmer, and a wideband oxygen sensor.