The Atomic 2 EFI system from MSD features 4, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 635 HP on forced induction applications. The Atomic 2 ECU is capable of fuel map self-learning and ignition timing control, improving idle stability, drivability, and wide-open throttle horsepower! Designed to fit on 4150 intake manifold, with ample clearance for factory air cleaners.

The Atomic 2 EFI provides the performance and drivability benefits that you expect from fuel injection. Quick starts, smooth idle and great throttle response just to name a few. Combine the fact that the Atomic 2 will support ignition timing through the ECU and you have a win-win combination. Initial timing is handled through a compact handheld monitor where you simply answer a few car guy questions about your engine and you're off and running!

Features:

• Direct replacement for common 4-barrel carburetors with 4150-style (square bore) flange
• Master Kits – Includes a complete fuel system – external fuel pressure regulator preset to 58.5psi, 20ft of 3/8” EFI Rated Fuel Hose, Fuel Pump, Filters, necessary hardware and bulkhead fitting to return fuel into the tank!
• NEW Throttle Body Flows 865 CFM and features 1 ¾” Throttle Plates
• NEW Booster design offers superior fuel atomization
• NEW ECU is 100% incorporated into the throttle body – no separate Power Module to mount
• NEW and Improved Calibration Wizard – Answer a few simple questions about your engine and it creates the base map, then starts tuning on its own! NO laptop required!
• NEW High-Resolution, Full Color, 3.5” Touchscreen for Initial Setup, Tuning, and Gauge Displays
• NEW Optional Laptop Tuneability – Ideal for fine tuning and unique engine combinations or for Boosted applications up to 21.5 PSI
• IMPROVED Built in Nitrous Control supports wet/dry nitrous
• Integrated ignition timing control – includes an ignition coil driver, no ignition box required
• Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
• NEW Black Ceramic Finish Option for durable, modern looks. Also available in raw aluminum
• NEW Throttle Body Linkage Now Includes Kickdown Support for 200R4, 700R4, C4, and C6 transmissions
• NEW Higher Horsepower Rating - Supports up to 650 HP Naturally Aspirated or 635 HP Forced Induction with Four 100 Lb/Hr Injectors
• Roller bearing throttle shafts for smooth throttle feel and less pedal effort
• External fuel pressure regulator required, set to a base pressure of 58.5 PSI, such as Holley 12-882. (Only on PN 2910-2 and 2910-2BK).
• Fuel pump control built-in with a 40 amp relay
• Fan control eliminates the need for external fan controller, simply wire a relay to the fan and tell the Atomic 2 ECU the desired fan activation temperature
• NEW OEM Style TPS/IAC and Fuel Pressure sensor, for years of dependable service and easy replacement
• The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn!
• NEW - Includes clamp-on oxygen sensor kit for simplified, leak free installation. Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor bung included
• NEW - Compatible with MSD, Holley Hyperspark and OEM Ignition Systems
• NEW - Compatible with Holley EFI digital dashes, gauges and fuel system accessories