New Features From Holley’s Atomic 2 EFI

Holley recently announced the release of the latest iteration of the ever-popular Atomic EFI system. The Atomic 2 system from MSD. This new system features 4 100LB/HR Fuel Injectors that are capable of supporting up to 650 HP naturally aspirated of 635 HP on forced induction applications. The Atomic 2 ECU is capable of fuel map self-learning and ignition timing control. This system also improves idle stability, drivability, and wide-open throttle horsepower!. It is designed to fit on a 4150- style intake manifold while having plenty of clearance for factory air cleaners.

What is great about the Atomic 2 is that it provides the performance and drivability benefits that you would expect from fuel injection. It has a quick start, smooth idle, and a great throttle response. That is just naming a few amazing pros as well. Now combine this with the fact that Atomic 2 will support ignition timing directly through the ECU and you definitely have a win-win combination. That’s right, the initial timing is handled through a compact handheld monitor. All you have to do is simply answer a few easy to answer to car guy questions and your engine and you’re off and running!

Here is a list of all the great features the Atomic 2 has to offer:

• Direct replacement for common 4-barrel carburetors with 4150-style (square bore) flange
• 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 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

Want to know more on why you should swap your carb set up to EFI? Click here.