Atomic 2 EFI Throttle Body System

Fits: Universal, Gasoline, Black

Maximum Horsepower with Gas:650

Injection Style:Throttle body

Timing Control Compatible:Yes

Power Adder Compatible:No

ECM Included:Yes

Self Tuning:Yes

User Tunable:Yes

Fuel Pump Included:No

EGR:No

Transmission Controller Included:No

Metering Style:Speed density

Intake Manifold Included:No

Multi-Port Fuel Rails Included:No

Throttle Body Included:Yes

Throttle Body Mounting Flange:4-barrel square bore

Venturi Quantity:4

Throttle Body Material:Aluminum

Throttle Body Finish:Natural

Injectors Included:Yes

Injector Size (lbs/hr):100 lbs./hr.

Calibration Module Included:Yes

Wiring Harness Included:Yes

Oxygen Sensor Included:Yes

Fuel Pressure Regulator Included:No

Distributor Included:No

MAP Sensor Included:Yes

IAT Sensor Included:Yes

TPS Sensor Included:Yes

IAC Motor Included:Yes

Quantity:Sold as a kit.

Notes:Kit does not include the fuel line, fuel pump, and filter.

MSD Atomic 2 EFI throttle body systems feature four 100 lb./hr. fuel injectors that can support 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! They're designed to fit on a 4150 intake manifold, with ample clearance for factory air cleaners. These systems provide 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 hand-held monitor where you simply answer a few car guy questions about your engine—and you're off and running! Atomic 2 systems are available in a raw aluminum or black ceramic finish.

Product features:

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

* NEW throttle body flows 865 cfm and features 1 3/4 in. throttle plates

* NEW booster design offers superior fuel atomization

* NEW ECU is 100 percent 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 in. touch screen for initial set-up, 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 four wiring connections required (Battery +, Battery -, Switched Ignition, and RPM)

* 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