MSD Ignition MSD2900-2 Atomic 2 EFI Throttle Body Master Kit Fuel Injection System Throttle Body Natural Fuel Pump Regulator And Filter

Redesigned from the ground up, the MSD Atomic 2 EFI systems now feature an 865 cfm throttle body with integrated ECU, full-color touch screen, simple 4-wire hookup, and several easy-to-use new features! They include four 100 lbs.-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! The units are designed to fit on 4150 intake manifolds, with ample clearance for factory air cleaners—providing the performance and drivability benefits that you expect from fuel injection, such as quick starts, smooth idle, and great throttle response. 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!

MSD Atomic 2 EFI Throttle Body Master Kit additional details:

* Direct replacement for common 4-barrel carburetors with 4150-style (square bore) flange
* Master kits include a complete fuel system; external fuel pressure regulator preset to 58.5 psi, 20 ft. of 3/8 in. 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 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 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, and 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
* 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 P/N 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

• Injection Style:Throttle body
• Fuel Injection System Type:Single 4-Barrel Throttle Body (4150 Flange)
• Maximum Horsepower with Gas:650
• Timing Control Compatible:Yes
• Power Adder Compatible:Yes
• ECM Included:Yes
• Self Tuning:Yes
• User Tunable:Yes
• Fuel Pump Included:Yes
• EGR:No
• Transmission Controller Included:No
• 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
• Venturi Diameter (mm):44.45mm
• Airflow Rate (cfm):865 cfm
• 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:Yes
• Distributor Included:No
• MAP Sensor Included:Yes
• IAT Sensor Included:No
• TPS Sensor Included:Yes
• IAC Motor Included:Yes
• Quantity:Sold as a kit.