MSD 2960 Installation

Atomic LS7 EFI Master Kit

DANGER

PN 2960

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Thank you for selecting the Atomic LS EFI System! MSD’s Atomic EFI systems are designed with two major goals; to simplify installation of EFI and deliver better overall performance from your engine. Simplicity is achieved through wired-less technology to ease installation plus the Atomic is simple to program with no PC required! Performance is delivered through advanced control of the fuel and ignition, just as you’d expect from MSD.

Parts Included:

2 - Fuel Rail Assemblies 1 - Power Module 1 - Handheld Monitor 1 - Wideband O2 Sensor 1 - Weld - in O2 Sensor Bung,

Plug, and Crush Washer 1 - CAN Cable 1 - 4x Cam Sensor Harness 1 - 58x Crank Sensor Harness 2 - MAP Sensor Harnesses 4 - Injector Harnesses 1 - IAT Sensor and Grommet 1 - 4GB Micro SD Card

1 - TPS Sensor Harness 4 - Grommets, Sleeves, and

Mounting Screws 4 - Fuel Rail Brackets 8 - Injector Retainer Clips 1 - Spacer 1 - Shim Kit 8 - 6mm x 12mm Screws 8 - 8/32” Socket Head Cap

Screws 4 - M6 x 100mm Intake Bolts 4 - 6mm x 16mm Hex Head

Bolts

4 - #12 Washers 2 - 90º -6AN Fittings 1 - 15” High Pressure Fuel Hose

Parts Required, Not Included:

Fuel System: Fuel Pump, Fuel

Filter, Injectors, Injector

O-Rings, Regulator, and Fuel Line. Thread sealer for intake bolts.

Not legal for use on pollution controlled vehicles: The MSD Atomic EFI system is not CARB approved for use on emission controlled vehicles.

modiﬁcations must be carried out by a qualiﬁed automotive technician. Installation of fuel system parts requires handling of gasoline. Ensure that work is performed in a well ventilated area with an approved ﬁre extinguisher nearby. Extinguish all open ﬂames, prohibit smoking and eliminate all sources of ignition in the area of the vehicle before beginning the installation. When working with fuel systems, eye goggles and other safety apparel should be worn to protect against debris and sprayed gasoline. The ﬁnished work must be thoroughly checked to ensure there are no fuel leaks.

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WARNING

Installation of this product requires detailed knowledge of automotive systems and repair procedures. Installation of fuel system parts and any fuel tank

2 INSTALLATION INSTRUCTIONS

EF

GH

DLPHI

EF

GH

EF

GH

DLPHI

CAPABILITIES

The Atomic LS7 kit is designed to ﬁt the original equipment intakes. The Atomic LS7 kit is a self integrated Fuel and Ignition controller for GEN-IV motors that requires no programming with a PC. The interface is controlled through a supplied hand held controller. The ECU only needs basic conﬁguration information. Once the engine warms up to operating temperature, the ECU tunes itself off of its basic conﬁguration to ensure the best performance and throttle response for your engine. The atomic will adjust timing and fuel curves on the ﬂy which in turn produces the smoothest idle, best fuel economy, and superior wide open throttle performance at all times. This also means that weather and altitude changes aren’t a problem with this system.

The Atomic LS7 kit uses all OE sensors with the exception of the wideband O2 sensor and the Intake Air Temperature sensor (IAT) supplied with the kit. The Atomic LS7 system only supports a cable driven throttle body at this time.

Note: The drive-by-wire throttle body will have to be converted to a cable drive throttle body like the MSD PN 2940.

COMPONENTS

Power Module: The Power Module of the Atomic LS7 is the

communication hub of the system and provides the high current fuel pump circuit and other input/outputs for optional features. The unit has two ports for the MSD CAN system as well as a wiring harness. There are connections for the WB02, the Handheld Monitor as well as Rail Power and CAN communication to the integrated fuel rails.

Handheld Programmer: The Atomic LS7 is a self-tuning fuel and

ignition control system. The system only needs the basic engine conﬁguration information to build a fuel table for the engine. The Handheld Programmer is used to enter all the engine parameters into the ECU, and uses the MSD CAN to communicate with the ECU. Once the engine has been started and warmed up to operating temperature, the ECU will monitor the sensors. The ECU will then adjust the fuel table and ignition in order to maintain a properly running engine.

Power

Module

Fuel Rails/ECU: The Fuel Rails/ECU is combination of the electronics that drive

an ECU and a fuel rail assembly built into one unit. All of the engine sensor connectors (except for the wideband O2 which connects to the Power Module directly) are found on the fuel rails. The fuel rails are equipped with -6AN ﬁttings, but will accept -8AN ﬁttings (the internal rail oriﬁce is

Handheld

Programmer

the same diameter as the -8AN).

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Drivers Side Fuel Rail Passenger Side Fuel Rail

INSTALLATION INSTRUCTIONS 3

COVER

FUEL RAILFUEL RAIL

LIFT THIS SIDE OF COVER ENOUGH TO CLEAR FUEL RAIL

PUSH COVER

Figure 1

PREPARING THE FUEL RAILS FOR INSTALLATION

1. Lift the rounded end of the rail cover off of the fuel rail (Figure 1).

2. Lubricate the o-rings on the injectors with some motor oil or silicone lubricant. Install the injector retainer clips onto the injectors. The injector clips will automatically secure the injector to the fuel rail when they are inserted into the bung (Figure 2).

3. Install the clips onto the injector before they are pushed into the fuel rail bung. The injector clip will automatically secure the injector to the rail.

4. Lubricate the o-rings on the injectors with some motor oil or silicone lubricant and push the fuel injectors into the bung without forcing them on. The injectors should slide in easily. Use the injector clips to lock the injectors onto the fuel rails (Figure 2).

WARNING: Forcing the injectors into the bung can

damage the o-rings, which can cause an engine ﬁre.

5. Plug the fuel injector pigtails into the fuel rail connections (Figure 3).

6. Connect the fuel injector pigtails to the injectors. The long wires connect to the injectors on each end of the fuel rail. The short wires connect to two inner injectors (Figure 4).

COVER

FUEL RAILFUEL RAIL

DISENGAGE FROM FUEL RAIL

LIFT COVER UP

FUEL RAILFUEL RAIL

Figure 2

Figure 3

Figure 4

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4 INSTALLATION INSTRUCTIONS

7. Plug the FPS connector into the fuel pressure sensor under the fuel rail (Figure 5).

8. Connect the CAN cable from one rail to the other (Figure

6).

9. Connect the heavy red Rail Power wires together between the two rails (Figure 7).

FUEL RAIL INSTALLATION

1. Preassemble the rail brackets with a washer and the M6 x 100MM bolts on the angled end. Use a single 6mm x 16mm hex head bolt on the closed end of the ﬂange. Coat the ends of the 100mm bolts with thread sealant (Figure 8).

2. Place the spacer/bushing/rail bracket assemblies onto the intake manifold. The angled end of the bracket is always facing to the left when installed correctly on either side of the engine. The rear passenger bracket will require a spacer between the intake manifold and the bracket (Figure 9)

Figure 5

Figure 6

Figure 7

Figure 8

SPACER

Figure 9

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INSTALLATION INSTRUCTIONS 5

FRONT

1ST PASS: 42 IN LB - 44 IN LB 2ND PASS: 87 IN LB - 89 IN LB

3. Use the provided torque sequence to torque the manifold bolts down correctly. Bolts #9 and #10 will use the stock length bolts/bushings (Figure 10).

4. Check the rail brackets for alignment with a straight edge (Figure 11).

5. Check the rail brackets for the correct installation height with a feeler gauge. If there is more than .015” of clearance, use a shim from the shim kit to correct (Figure 12).

6. Install the rails onto the manifold. Use the supplied 6mm bolts to secure the rails to the rail brackets. Torque to 85 in lb – 87 in. lb.

STOP HERE

Figure 10

Figure 11

.015"

Figure 12

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6 INSTALLATION INSTRUCTIONS

7. STOP. Visually inspect and ensure all the injectors are sitting evenly and the injector o-rings are not pinched or visible. Failure to install the injectors correctly can result in an engine ﬁre.

8. Begin routing the sensor harnesses and plugging them into the appropriate sensors.

9. Snap the rail covers in place and secure them onto the fuel rails with the supplied 8/32” socket head cap screws (Figure 13).

10. Secure the front cover onto the fuel rail with the supplied 8/32” socket head cap screws. Install the back rail cover plate onto the assembly and secure it with the supplied socket head cap screws.

Figure 13

FUEL RAIL/ECU WIRING

The Atomic LS7 kit has several harnesses to install with the different variations of the OE sensors. These adapter harnesses plug into the connectors found on the rails themselves. The IAC and TPS connectors are on both rails to accommodate the different throttle body conﬁgurations.

Air Conditioning kick up (AC): When 12v is applied to the AC kick up wire, the ECU will kick up the

and ground the red Fan 1 wire to compensate for the engine load change created by the AC compressor.

Alternator: The kit plugs directly into the factory GM alternator. Cam Sensor: The kit supports the 4x cam sensors. The easiest way to identify the cam sensor on

a stock engine would be by locating the sensor on the motor. The 4x sensor is mounted on the timing chain cover.

Controller area network (CAN): The kit utilizes a CAN communication for wiring between the fuel

rails/ECU and the Power module.

Crank sensor: The kit supports the 58x crankshaft trigger wheels. Engine Coolant Temperature (ECT) sensor: The engine coolant temperature is monitored by the

ECU for fuel and ignition adjustments in closed loop operation.

Fuel Pressure (FP) Sensor: The kit includes a fuel pressure sensor which is already installed on the

driver side fuel rail.

Idle Air Control (IAC) Sensor: The kit has a connector on each rail to accommodate different intake

styles. IAC must be plugged into the driver side connector.

Ignition Coils: The kit has a factory connector that will connect to the factory coil bracket harness

on each valve cover (not supplied with the kit). There is an extra ground wire with each coil bracket connector that should be grounded to the back of each cylinder head.

Injectors: The kit supports the factory EV6 style injectors (Figure 14). Intake Air Temperature (IAT) sensor: The sensor is supplied in the parts bag.

It is recommended to install the sensor in the intake air track before the throttle body. A ¾” hole is required for the sensor.

Map sensor: The kit supports the original equipment (OE) MAP sensors. Oil Pressure (Oil) sensor: The kit utilizes the factory oil pressure sensor. There

are different style sensors, but the connector is the same between these sensors.

Power: The heavy gauge wire supplies 12v to both fuel rails from the power

module.

Figure 14

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INSTALLATION INSTRUCTIONS 7

Throttle Position (TPS) Sensor: The kit has a connector on each rail for the TPS sensor. It must be

plugged into the driver side rail. The kit only supports a cable driven throttle body at this time and includes an adapter harness for the TPS sensor used on a cable driven throttle body.

Wide Band O2 Sensor: A wide band O2 sensor is supplied with the kit. The O2 sensor is used by

the ECU to monitor air/fuel ratios (AFR) in the exhaust gases. Adjustments are made by the ECU in closed loop to maintain (AFR).

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8 INSTALLATION INSTRUCTIONS

*INJECTORS ADAPTERS

ARE INTERCHANGEABLE.

(EV6 Adapters shown)

NOTE: Do not cross the

injector harnesses when

installing them on the

injectors.

PASSENGER

MODULE

POWER

TO

ETC/

A. Brown

B. Pink

C. Brn/White - Gnd

D. Not Used

V V T

D. Black - Coil 2B

E. Green - TPS1

F. Orange - 5V

G. Violet - TPS2

H. Not Used

(NOT USED

ON LS7)

D LPHI

IAT

IAC2

A. Black - Ground

B. Violet - Signal

A. Orange - Coil 1B

B. Gray - Coil 1A

C. Blue - Coil 2A

CURRENTLY

USED)

(NOT

Orange - AC

INJ2*

1. Signal

2. 12V

INJ4*

1. Signal

2. 12V

MAP

2, 4, 6, 8

A. Orange - 5V

B. Lt Green - Signal

C. Brown - Ground

E. Brown - Ref Gnd

F. White - Coil 6

G. Lt. Blue - Coil 8

H. Pink - 12V

SIDE

FGH

COILS

A. Black - Ground

B. Tan - Coil 2

C. Lt. Green - Coil 4

D. Not Used

Black - GROUND

INJ6*

1. Signal

2. 12V

INJ8*

1. Signal

2. 12V

CRANK

A. Pink - 12V

B. Orange - 5 V

C. Brown - Ground

D. Org/Yel - Signal

Red - POWER Red - POWER

Red - POWER

CAN

A. Brown

B. Pink

C. Brn/White - Gnd

D. Not Used

E. Green - TPS1

F. Orange - 5V

G. Violet - TPS2

H. Not Used

1. Orange - 5V

2. Black - Ground

3. Blue - Signal

TPS ADAPTER

B. Gray - Coil 1A

C. Blue - Coil 2A

D. Black - Coil 2B

ETC/TPS

IAC

C. Not Used

D. Not Used

A. Orange - Coil 1B

A. Black - Ground

B. Yellow - Signal

ECT

A. Not Used

B. Brown - L Term

ALT

1. Signal

2. 12V

INJ1*

1. Signal

2. 12V

INJ3*

F. Green - Coil 3

G. Tan - Coil 1

H. Pink - 12V

A. Pink - 12V

B. Orange - 5V

C. Brown - Ground

D. Brn/Wht - Signal

GROUND

CAM

Black

A. Black - Ground

B. Blue - Coil 7

C. Brn/White - Coil 5

D. Not Used

E. Brown - Ref Ground

1. Black - Ground

2. Orange - 5V

3. Lt Blue - Signal

1, 3, 5, 7

COILS

H

F

G

DRIVER

SIDE

FPS

1. Signal

2. 12V

INJ5*

1. Signal

2. 12V

INJ7*

1. Black - Ground

2. Orange - 5V

3. White - Signal

OIL

2. Yellow - CAN HI

3. Blk/Red - Gnd

4. Black - Gnd

5. Orange - Crank

6. Brown - Cam

7. Blue - Tsync

8. Gray - Shield

CAN

1. Green - CAN LO

Figure 15 Wiring

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INSTALLATION INSTRUCTIONS 9

POWER MODULE INSTALLATION

The Power Module of the Atomic EFI system handles high current circuits such as the fuel pump and WBO2. The unit has two ports for the MSD CAN system as well as a wiring harness. The CAN ports will provide communication between the Power Module, the passenger side fuel/ECU rail and the Handheld Monitor. It is important to select a proper mounting location for the Power Module. The unit can be mounted in the interior or the engine compartment as long as it is away from direct heat sources. It is not recommended to mount the unit in an enclosed area, such as the glove box. When a suitable location is found, make sure all wires reach their connections. Also be sure that the CAN port can be accessed

Figure 16

for use with the Handheld Monitor. Use the Power Module

®

as a template and mark the location of the holes. Use a size #20 drill bit to prepare for the supplied self tapping screws. Assemble the sleeves in the

LS

CONTROLLER

MONITOR

CONNECTOR

ONLY

power module (Figure 16).

HANDHELD

POWER MODULE WIR-

MONITOR

ING (FIGURE 17)

Not all of the wires from the Power Module need to be connected for proper operation of the Atomic LS7 kit. Some of the wires such as the nitrous input, 2-step rev control, or electric fan controls only need to be connected if their functions are being used. In the chart labeled Power Module Wiring, wires marked “REQ” must be connected for the system to operate while those marked

FUEL PUMP

GROUND

BATTERY 1*

BATTERY 2*

“OPT” are optional depending on the features needed. For the initial installation and start up,

* BATTERY 1 AND 2

MUST BOTH BE CONNECTED

it is recommended to connect only the required wires. Note: The Power Module uses two heavy gauge wire connections to the battery. Both

Figure 17 Power Module Wiring Diagram.

leads must be connected in order for the Power Module and Atomic LS Truck kit to operate correctly.

• ConnecttheCANfromthefuelrailsintothecenterCANportonthePowerModule.

• ConnecttheHandheldMonitortotheCANportontherightsideofthePowerModule.

• Connectthe16-pinGTconnectorharnessincludedinthekit.

• Connectthe4-pinDeutschconnectharnessincludedinthekit.

• ConnectthewidebandO2sensorincludedinthekit.

• Makeallthenecessaryelectricalconnections.

CAN ONLY

SLED POWER FAN 1 LAUNCH NITROUS SPEED REF SPEED TACH SW 12V FAN 2 MIL GROUND

IP

RED

VM

YELLOW

H-

BLK/WHT

H+

BLK/RED

IA

GREEN

UN

BLACK

TO PASSENGER

FUEL RAIL

POWER TO

PASSENGER

FUEL RAIL

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10 INSTALLATION INSTRUCTIONS

Power Module

1 2

4-Way

3

Deutsch

CONNECTOR

4 A B C

D E

F G H

J

CONNECTOR

GT Series 16 Way

K

L

M

N

P R S

Color

Red Black Orange Red Red Blue Bro/Wht

Brown Lt Blue Gray Red Orange Red Red Yellow Blk/Wht Blk/Red Green Black Lt Green

Use

REQ REQ REQ REQ OPT

N/A

OPT

OPT OPT OPT REQ OPT REQ REQ REQ REQ REQ REQ REQ OPT

Function

Battery 1, Connect to Positive Battery terminal. Must be connected. Ground, Connect to solid, clean engine ground. Pump, Connect to Fuel Pump Positive terminal. Battery 2, Connect to Battery Positive terminal. Must be connected. Fan 1, Supplies ground to activate Fan 1 Reserve for later use.

Nitrous, When supplied with 12 volts, timing will be retarded and the

air/fuel ratio will be corrected to the target nitrous setting.

Speed Ref. (-) Speed Signal (+) Tach, Supplies 12V square wave signal Switched 12V, Connect to ignition switch Fan 2, Supplies ground to activate Fan 2 at desired temperature. Supplies power to the Fuel Rail

IP

VM

H-

WBO2

H+

IA

UN

MIL Ground

This wire functions as a Malfunction Indicator Lamp (MIL). This wire will provide a ground in the event of a diagnostic code. Connect the (MIL) to the ground side of a light bulb or LED. Connect

the other side of the light blub or LED to 12v.

FUEL SYSTEM REQUIREMENTS

The Atomic LS fuel injection system requires a high pressure fuel pump system. The fuel system is not supplied due to the large variety of applications incorporating the LS engine platform. Depending on your engine combination, the Atomic LS requires a minimum of 58-62 psi to operate. When selecting a pump, regulator and lines, be sure each component is designed to perform at high pressure. MSD offers fuel pumps, hose and accessories to complete your installation. Following are some guidelines intended to help set up a fuel system for your Atomic as well as components available separately from MSD. The Atomic is capable of operating with a return or returnless style system.

•Whenrunningareturnlessfuelsystem(PulseWidthModulated)thefuelpumpmustbemountedinthe

tank. This will result in quieter operation, a reduction in pump temperature, and a less likely chance of fuel pump cavitation.

•MSDsupplies-6ANPush-Lockstylettingsforthefuelrails.ThesettingsmustbeusedwithMSD's

high pressure EFI hose.

• Ifmountingthepumpinthetankisnotanoption,installthepumpascloseaspossibletothetank.

Within 2-feet of sending unit is recommended. MSD recommends the Atomic Fuel Pump, PN 2925 or PN 2926.

•WhenusingaPWMfuelsystem,pulsationsandharmonicscouldcauseunstablefuelpressurethatcan

result in fuel pump cavitation or poor engine performance. For this reason MSD recommends not to use a hard line for the fuel system in PWM mode.

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INSTALLATION INSTRUCTIONS 11

, MOUNT

FUEL SYSTEM INSTALLATION

FUEL RAIL

(UNDER COVER)

-6 90° FITTING SUPPLIED

FUEL RAIL

(UNDER COVER)

NOTE: IF RUNNING A RETURNLESS FUEL SYSTEM, THE PUMP MUST BE MOUNTED IN THE TANK.

MSD ADJUSTABLE

REGULATOR

FUEL

FILTER

FUEL TANK

FUEL

PUMP

IT IS RECOMMENDED TO MOUNT THE FUEL PUMP IN THE TANK WHENEVER POSSIBLE. IF IT MUST BE MOUNTED EXTERNALLY THE PUMP WITHIN 2-FEET OF THE FUEL TANK SENDING UNIT.

Figure 18.

IN-TANK PUMPS

The MSD Atomic Fuel Pump (not supplied) can be used in the tank however it would require a sock, or ﬁlter element on the pickup side of the pump. It is important to note that the wiring used to run the pump will need to meet requirements to be submersed in fuel. When wiring an in-tank pump, it is recommended to use a wire that conforms to SAE speciﬁcations J1128 and J378. This wiring features a Thermoplastic insulated wiring with polyvinyl chloride insulation for protection against gasoline, oil, and more. In addition, different fuel line will be required internally if the pump is to be mounted in the tank. Fuel line that meets SAE 30R10 speciﬁcations MUST be used. Failure to do so will cause severe damage to your engine and/or fuel system.

WARNING: Improper installation or use of fuel system components can cause severe damage to the engine and/or fuel system that will not be covered by the manufacturer’s warranty. Atomic Fuel Pump, PN 2925: This pump features 3/8” inlet and outlet. The pump will support

approximately 525 hp and is approved for in-tank use (no wiring or in-tank mounting hardware/ pickup element are supplied).

Fuel Pump Kit, PN 2920: This Kit is supplied with MSD’s PWM Fuel Pump, a pre and post-ﬁlter, 15-ft

of 3/8 fuel injection line and mounting hardware.

Fuel System Return Kit, PN 2922: If you plan on running a return line with your Atomic LS, this kit

provides another 15-ft of 3/8” injection line, an MSD Regulator and several push-lock ﬁttings.

High Horsepower Fuel Kit, PN 2921: This pump will support the power demands of engines up to

650 horsepower. The pump features 3/8” inlet and outlet and is approved for in-tank use (no wiring or in-tank mounting hardware/sock are supplied).

FUEL INLET FITTINGS AND CROSS-OVER LINE

LS engines require a cross-over fuel line to route the fuel from one bank to the other. This is typically done at the front of the engine (Figure 19). Due to the variety of intake manifolds and accessories a cross-over line must be made for each application.

Figure 19 Installing Fuel Hose to the Push-Lock Fittings.

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12 INSTALLATION INSTRUCTIONS

MSD supplies a length of fuel hose and two 90° -6AN ﬁttings to prepare a fuel crossover line. The ﬁttings utilize Push-Lock technology and are designed exclusively for use with the supplied hose. These ﬁttings do not use clamps, however it is imperative to follow the installation instructions.

Proper installation begins with a clean, square cut of the hose. A hose cutting tool or new razor blade are recommended. When installing the hose it is important that the hose is pushed on all the way to the thin beauty ring (Figure 20). This means the hose should fully overlap the inboard barb. Too little engagement, as well as overengagement, will result in a compromised connection that is prone to failure.

1. Determine the length of hose needed. Mark the hose and cut it using a hose cutter or new razor blade. There should be minimal disturbance of the outer jacket, braids and inner liner. The cut plane should be perpendicular to the hose axis. (Figure 21).

2. Before installing the hose to the ﬁtting, it is important to anchor the ﬁtting. Proper installation cannot be achieved by holding the hose and ﬁtting in your hands. For best results, the hose should be installed with minimal twisting or pausing.

3. Apply a light coat of oil to the barbs on the ﬁtting and to the inside of the fuel hose. Use care not to get oil on the outside of the hose as it will be impossible to get a ﬁrm grip on the hose.

4. With the ﬁtting anchored securely, push the hose over the barbs. The hose is properly installed when it is ﬂush with the thin edge of the beauty ring (Figure 22). At this point, the hose end should have rolled over the inboard barb.

WARNING: MSD’s Push-Lock ﬁttings are designed for

use with the MSD fuel hose only. Do not use the MSD fuel hose with other ﬁttings. Do not use MSD Push-Lock ﬁttings with other fuel hose. Compatibility issues may cause fuel leaks. Fuel Inlet Fittings and Cross-Over Line: LS engines require a cross-over fuel line to route the fuel from one bank to the other. This is typically done at the front of the engine. Due to the variety of intake manifolds and accessories a cross-over line must be made for each application.

The supplied MSD Push-Lock AN ﬁttings

are designed only for use with the supplied fuel hose (Aeroquip AQP FC598). We do not recommend mixing Push-Lock style fittings and hoses from different manufacturers. Doing so may result in fuel leaks and expose other dangerous incompatibilities.

Figure 20 Installing Fuel Hose

to the Push-Lock Fittings.

CORRECT CLEAN, SQUARE CUT

INCORRECT JAGGED, ROUGH CUT RESULTS IN A COMPROMISED CONNECTION

Figure 21 Severing the Hose Properly.

Properly Installed Push-Lock Fitting

Improperly Installed Push-Lock Fitting

Figure 22 Installed Push-Lock Fitting.

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INSTALLATION INSTRUCTIONS 13

WIDE BAND OXYGEN SENSOR INSTALLATION

The MSD Atomic EFI system requires a single Wide

02 SENSOR

Band Oxygen Sensor (WBO2) for operation. MSD suggests that the bung for this sensor be installed prior to starting any other part of the conversion process. By having the WBO2 in place ﬁrst, there is a reduced chance of the vehicle being immobilized for an extended time. The bung for the WBO2 provided

POSITION AT LEAST 10°

by MSD has a plug included so that the vehicle can be driven between the time of exhaust modiﬁcation and installing the rest of the Atomic system, if needed.

EXHAUST COLLECTOR

The WBO2 can be installed in either exhaust bank. The sensor connects to the Power Module, so install the

Figure 23 WBO2 Sensor Location.

sensor on the bank closest to where you plan to mount the Module. The bung should be installed by a qualiﬁed exhaust technician and pressure tested. Proper installation of the oxygen sensor is critical to the performance of the Atomic EFI. Improper installation could lead to engine damage.

1. Locate the ideal spot to install the WBO2. a. This location should be 2-4 inches after the exhaust collector. The sensor must be more

than 18 inches forward of the exhaust tip. For applications where short or open headers are used, install the WBO2 in the primary tube of the rear cylinder at least 8 inches away from the exhaust port. The Atomic will not work on “Zoomie” style headers.

b. The WBO2 sensor should be at least 10˚ above horizontal to allow condensation runoff.

Without this angle the sensor is signiﬁcantly more likely to sustain water damage (Figure 23). c. Never place a WBO2 on the outside of a bend. d. The WBO2 must be mounted in the exhaust prior to any catalytic converter, if applicable.

2. Drill a 7/8” hole in the exhaust where the WBO2 will go.

3. Weld in the supplied bung. Ensure the weld goes completely around the bung and is air tight.

4. Insert supplied plug in bung. Never run the vehicle with a WBO2 installed but not plugged in to the harness and powered up; it will damage the sensor.

5. When completing the Atomic EFI installation, remove the plug and insert the WBO2 for use. MSD suggests using a small amount of anti-seize on the threads.

Note: The Atomic EFI is extremely sensitive to air leaks in the exhaust system. Any air leak between

the engine and the WBO2 will cause the Atomic to have false readings, which can lead to poor engine performance, misﬁres, and an inability to properly auto-tune. Extended running of the Atomic EFI with an exhaust leak can result in detonation and severe engine damage. Improper installation of the oxygen sensor, and any damage that may result from such an installation, is not covered by the manufacturer’s warranty.

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14 INSTALLATION INSTRUCTIONS

WARNING: DO NOT ATTEMPT TO START THE ENGINE. Before turning the ignition key to the ON position, conﬁrm all fuel line connections are tight and all electrical connections are correct. After conﬁrming all electrical connections and fuel lines, turn the ignition key to the ON position. Check every hose and ﬁtting connection for any signs of fuel leaks. The Handheld screen should illuminate and display the Main Menu.

PROGRAMMING

The Handheld Monitor plugs into the Power Module via the CAN connection. It can be removed once the initial setup is complete, or can remain connected for use of features such as the dash or digital gauge displays. The Handheld Monitor features a joystick to scroll through the settings. Scroll up and down to the setting and push the joy stick to the right to select the options. When the selection is made, either push in, or go back (push to the left) to save/conﬁrm settings changes.

MAIN MENU

Six selections will come up the Monitor under the Main Menu. If this is the ﬁrst time powering up the Atomic LS, select Initial Setup (Figure 24).

Atomic LS Dash: This selection allows you to view a variety of

engine functions in real time when the engine is running.

Atomic LS Gauges: This setting puts ﬁve important values

in gauge form to ease viewing the data. This includes engine rpm, oil pressure, engine coolant temperature, speed (when connected), battery voltage, and air/fuel ratio.

Initial Setup: These are values that are required to start the

engine.

Advanced Setup: Optional settings for features and optimized

drivability settings.

Diagnostics: This screen will help you troubleshoot and

identify potential issues.

Display Setup: Provides adjustments for the appearance of

the monitor screen.

Main Menu

Atomic LS Dash

Atomic LS Gauges

Figure 24 Monitor Main Menu

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INSTALLATION INSTRUCTIONS 15

INITIAL SETUP PROGRAMMING

Scroll down to Initial Setup and push the joystick to the right. The following parameters must be programmed.

Engine Type: This value determines the engine platform (Figure

25). There are over 26 engine combinations to select from. There is also a Custom setting for highly modiﬁed or aftermarket engines. This setting is important as once an engine type is programmed, other settings will default to the OEM components that were supplied on that engine.

For example, if LQ9 is selected, the coil, injector and MAP

sensor will automatically set to the OEM components. (Different values can also be input if modiﬁcations have been made.)

Custom: In the event a custom built engine is the target engine,

it is recommended to select the closest Engine Type setting ﬁrst. This will produce a start-up calibration and default settings including the volumetric efﬁciency tables for that series of engine. From there, go back into each selection and edit to the engine speciﬁcations.

Engine Size: Once the engine type has been selected, the

stock cubic inches will automatically be set. If the engine has been modiﬁed with a different stroke or bore, select and input the size. The range is from 100-800 cubic inches (Figure 25).

Camshaft Type: There are three cam selections to choose;

Street/Stock, Mild and Performance. Note that if the lobe separation angle (LSA) is less than 108°, it is recommended to input the next larger cam. Cams with over 250° duration are not recommended for use with the Atomic LS system (Figure 25).

Handheld Main Menu

Engine Type

Engine Size

CAM

DURATION AT .050"

Street Stock Less than 210° Mild 211° - 230° Performance 231°-250°

Coils: Once the engine type is selected, the OEM coil will be

Camshaft Type

automatically loaded in the default calibration ﬁle. If different coils or MSD LS Coils are used, change the setting to the correct coil type. (Figure 25)

Note: If an engine type is selected, only the compatible coils

will be available in the Coils screen. For example if LQ9 is selected, the GM and MSD compatible numbers will only be selectable from the menu.

Coils

Figure 25

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16 INSTALLATION INSTRUCTIONS

Fuel Injector: Once the engine type is selected above, the

OEM style injector will be automatically loaded in the default calibration ﬁle. If a different injector is used, change the setting to the correct injector. Most LS based injectors have the part number stamped on them (Figure 26).

If using different injectors, you may enter the ﬂow rate

in pounds per hour.

MAP Sensor: Once the engine type is selected above, the

OEM MAP Sensor will be automatically selected.

Fuel Injector Type

However, if a different sensor is used the slope and offset can manually be entered (Figure 26).

Fuel Pump Type: There are three selections for the fuel pump

system. Select the system in use with the Atomic LS7 system (Figure 26).

• Pulse WidthModulated:Thisselectionisusedonly

when running a returnless fuel system with NO regulator.

• Non-PWMwithRegulator:Thisselectionisusedwhen

running a return style system with a regulator.

Map Sensor

• PWM with Regulator: This selection is used when

running a return style system with a regulator. It will run the pump at 50% duty cycle at idle producing quieter pump operation and will increase a duty cycle of 100% as the throttle and injector load increase.

Note: It is recommended to use Non-PWM with a regulator

when setting fuel pressure as the PWM setting may decrease fuel pressure slightly at idle.

Idle RPM Target: Select the rpm that the engine should idle

at. The rpm range is adjustable in 25 rpm increments

Fuel Pump Type

(Figure 26).

Note: Running too high of an idle speed in an automatic

transmission equipped vehicle with a stock torque

converter can cause idle issues in gear.

Rev Limit: The rev-limiter is a fuel cut-off type rev-limiter.

Select the rpm range that engine should rev limit. The range is 3,000 -12,000 rpm and is adjustable in 25 rpm increments. Default for the rev limit is 6,500 rpm (Figure 26).

Idel RPM Target

Once all of the settings in the Initial Setup menu are selected, the Atomic has enough information to start and run the engine. It is recommended to scroll through the advanced settings to program selections that may be useful after the initial start up (such as the cooling fan activation temperatures).

Rev Limit

Figure 26

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INSTALLATION INSTRUCTIONS 17

ADVANCED SETUP

The Advanced Setup features are optional as the Initial Setup menu provides the Atomic EFI with the values needed to run the engine. Features in the Advanced Menu are designed to deliver additional features and advanced tuning functions to further enhance the drivability and overall performance of the engine. Fans: This setting sets the temperatures to activate two electric

fans. Each circuit will be activated by supplying ground through the Red (Pin A) and Orange (Pin H) wires of the GT-Series 16 pin harness from the Power Module. A relay is required for both circuits since those wires are a low current ground. The fans will activate at the desired temperature and will remain on until the temperature falls below 10° of the setting. Settings are 100°-300°F (Figure 27).

A/F Targets: The Atomic LS provides an option to set an air/

fuel target for Idle, Part Throttle, Wide Open (WOT), Nitrous and Boost. The Atomic will use its self-learning technology to adjust the fuel delivery to meet the target air/fuel ratio. The values are adjusted in 0.1 increments and range from rich at 10:1 to dead lean at 16:1. The ideal air/fuel ratio for cruising is called stoichiometric and is commonly referred as a 14.7:1 air/fuel ratio. (Fig )

Boost: The Atomic will switch to the commanded boost

A/F ratio once the manifold pressure reaches 110Kpa (approximately 16psia - 32.5in/Hg).

Ignition Timing: The Atomic provides a base timing table for

each engine application. You can also modify these settings at idle (closed throttle), part throttle, wide open throttle (WOT), nitrous, and boost. Each setting is adjustable +/-10°. Note that the values programmed are set for stock engines using 91 octane fuel. For lower octane fuels it is recommended to retard the timing 5° as a starting point. Timing can be retarded up to 20° in

0.1° increments. Note that in order to alter the timing for nitrous use, the Nitrous Selection in the Advanced menu MUST be programmed to ENABLE. When the nitrous is activated by supplying 12 volts to the Brown/White (Pin C) wire the timing will retard (Figure 27).

TPS Enrichment: To assist in throttle transitions the Atomic

EFI has a feature to increase fuel delivery by a prescribed percentage any time there is an increase in throttle position. If needed, make small changes in no more than 5% increments without further testing. Most engines will ﬁnd 25% being sufﬁcient. Most applications will accept 15%-35% enrichment. Adjustable from 0-100% in 1% increments (Figure 27).

Advanced Setup

Fans

A/F Targets

Igniton Timing

TPS Enrichment

Figure 27

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18 INSTALLATION INSTRUCTIONS

MAP Enrichment: To assist in manifold pressure transitions

the Atomic EFI offers a MAP enrichment feature. This function adds fuel based on MAP transitions while moving the throttle. Large cam vehicles with low vacuum generally required a slightly smaller number while stock/ small camshaft vehicles with a high vacuum may require more. If needed make small changes of no more than 5% increments without further testing, 25% is sufﬁcient for most engines but between 15-35% is normal. Typically, the higher the vacuum the higher the percentage needed.

MAP Enrichment Setting

Adjustable from 0-100% in 1% increments (Figure 28).

Nitrous: This setting enables the nitrous timing retard in the

Ignition timing and the nitrous AFR in AF Target setting. The default setting is DISABLED (Figure 28).

Calibrate Speed: If there is speed output on the transmission,

a reference signal can be delivered to the Atomic LS. On manual transmission equipped vehicles, the Calibrate Speed option improves drivability when transitioning from high RPM conditions to an idle (such as comming off of a hill / between moving and coming to a complete

2-Step RPM Limit

stop). The Power Module has a Brown (Pin D) wire and a Light Blue (Pin E) wire. These wires connect to a magnetic pickup monitoring driveshaft speed with a collar mounted on a yoke. To program the calibration, drive to 40mph on an open road to maintain speed. Once at 40mph, select YES on the handheld. This will calibrate the speed input. This option will also enable a speedometer reading in the handheld Atomic LS Dash (Figure 28).

Enable or Disable Nitrous

Note: Use of a minimum four magnet collar is

recommended with this option.

Racepak Dash: This setting allows the Atomic LS Truck kit

to interface with a Racepak dash such an IQ3. Disable is default. Racepak offers an optional V-net sensor to connect their dash to the MSD Can-Bus connector (Figure 28).

Speed Reference Setting

Racepak Dash Option

Figure 28

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INSTALLATION INSTRUCTIONS 19

Before attempting to start the motor, run through the pre-start check list to ensure a safe and successful start.

• Double-checkallwiring

• Powerandgroundleadsareconnecteddirectlytothebattery.

• Red(PinG)shouldbeconnectedtoa12vignitionsourcethatishotintheRUNandSTARTpositions

of the key cycle.

• Allwiring,modules,andfuelcomponentsaremountedawayfromheatsourcessuchasexhaust

and pinch points.

• WidebandO2sensorisinstalledandpluggedintothePowerModule

• Therearenoexhaustleaks.

• Thethrottlecableisconnectedandmovesfreelywithnobinding.

• Theinitialprogramminghasbeensetinthehandheldmenu.

• Keyontheignitionafewtimestoprimethefuelpump.Thefuelpressuremayneedtobeadjusted

to 58-60psi. Fuel pressure can be monitored in the Atomic Dash section of the handheld menu.

• Withthefuelsystemunderpressurefromprimingthesystem,checkforleaksorfuelspraying.Do

not attempt to start the engine if fuel leaks are present.

• Monitor EngineRPMinthe AtomicDashinthe handheldunitastheengine iscrankedoverto

ensure the crank sensor is providing an RPM signal.

HANDHELD DISPLAY OPTIONS

Display Setup: The display Setup controls the look

of the handheld unit and the Firmware version. The Atomic LS can be reset to factory default in this section as well (Figure 29).

LCD Contrast: Adjust the contrast on the LCD screen

if it is hard to see the display. Contrast is adjusted using the joystick to go up or down in ﬁve percentage increments.

Backlight Level: The brightness of the screen is

determined by this setting. The Backlight Level may need to be adjusted depending on outside light levels. Brightness is adjusted using the joystick to go up or down in ﬁve percentage increments. (Figure 29).

Display Units: The Atomic can display items in either

English (cubic inches, Fahrenheit) or Metric (liters, Celsius). Set Atomic Defaults: Use this feature to reset the Atomic EFI. Selecting “YES” on this screen will take all setting, including fuel maps, back to the factory defaults. This can be done when installing the Atomic on a different engine, or for troubleshooting reasons (Figure 29).

Firmware Versions: The Atomic Firmware version can be found in this section (Figure 29).

Figure 29 Monitor Display Selections

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20 INSTALLATION INSTRUCTIONS

DIAGNOSTICS

There is a self-diagnosing system built into the Atomic EFI. Each covered parameter can show a status in one of three ways (Fig).

• “OK”:theparameterisfunctioningnormally.

• “ErrorC”:thereiscurrentlyanerroroccurring.

• “ErrorH”:Apreviouserrorthathasbeenresetsinceitdidnot

reoccur within the last ten ignition cycles.

Figure 35

CODE NAME

TPS

MAP

IAT

ECT

BATT

INJ DC

FUEL PRESSURE

WBO2

WHAT IT MEANS

There is no reading for the Throttle Position Sensor.

There is no reading for the Manifold Absolute Pressure Sensor.

There is no reading for the Inlet Air Temperature Sensor. The ECU will default to 275°F when shorted or -40°F when open.

There is no reading for the Engine Coolant Temperature Sensor. he ECU will default to 275°F when shorted or -40°F when open.

The Atomic is receiving the wrong voltage. The unit is measuring either less than 9 volts or greater than 16 volts.

Excessive Injector Duty Cycle

There is no reading for the Fuel Pressure Sensor.

A. "NOT CONNECTED" indicates that no sensor is detected. B. "ERROR" indicates that the sensor has failed.

PROBABLE CORRECTION(S)

The sensor may be at fault. Check wiring and/or replace sensor.

The sensor maybe at fault. Check wiring and/or replace sensor.

Faulty sensor; loose or no connection. Check wiring and/or replace sensor.

Check the battery connection from the Power Module to the battery. Ensure that the battery and alternator are working correctly.

Ifyouarerunningareturnlessfuelsystemyourengine'sneeds mayexceedtheAtomic'smaximumcapabilities.Ifyouarerun-

ning a return system check to see that you are maintaining the recommended fuel pressure. If you have adequate fuel pres-

suretheengine'sneedsmayexceedinjectorowrate.

Faulty sensor; loose or no connection. Check wiring and/or replace sensor.

A. Check to see that the sensor is securely plugged into the system. Inspect wiring if it is plugged into the system. B. The sensor will need to be replaced.

Notethat'warmingup'isnormalduringstart-upfortherst20

seconds.

FP CAV

MAP SELECT

BARO

This code will set if there is an issue with Fuel Pump Cavitation (similar to vapor lock). It can only set when running a returnless fuel system. This may occur when the commanded fuel pressure (from the ECU) is different than the fuel pressure (at the Fuel Pressure Sensor).

ECU compares the MAP reading with the Baro reading on key up. If these are different by more than 5kPa, the code is activated.

The Baro sensor voltage is out of range, and the ECU has defaulted to the last known good Baro value.

Check the fuel system and determine that it meets the requirements to run a returnless (PWM) system. Check the ﬁlters, the sock in the tank, and inspect the lines for any kinks or pinches that would affect the fuel ﬂow and pressure of the system. If the code continues, the fuel system may need to be converted to an in-tank fuel pump and/or regulated (return) fuel system.

Double check your MAP selection and make sure that you selected the correct P/N of sensor. It could also mean a problem with the Baro or MAP sensor itself (see above codes).

Turn the ignition off. Wait 10 seconds, and turn the ignition back on. If the code remains, call customer service. Unless the vehicle has been through a large change in altitude since the last ignition on/off cycle (towed somewhere), everything will function normally.

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INSTALLATION INSTRUCTIONS 21

CLEAR FLOOD

If a ﬂood condition occurs, turn the key on then press the accelerator to wide-open throttle. This tells the ECU to turn off the injectors. Crank the engine to clear the ﬂood condition until the engine starts (release the throttle).

Note: The TPS is self calibrating so the key must be in the ON position prior to pressing the accelerator.

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22 INSTALLATION INSTRUCTIONS

TECH NOTES

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INSTALLATION INSTRUCTIONS 23

TECH NOTES

_________________________________________________________________________________________________________________________

_________________________________________________________________________________

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24 INSTALLATION INSTRUCTIONS

TECH NOTES

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Service

In case of malfunction, this MSD component will be repaired free of charge according to the terms of the warranty. When returning MSD components for warranty service, Proof of Purchase must be supplied for veriﬁcation. After the warranty period has expired, repair service is based on a minimum and maximum fee.

All returns must have a Return Material Authorization (RMA) number issued to them before being returned. To obtain an RMA number please contact MSD Customer Service at 1 (888) MSD-7859 or visit our website at www.msdperformance.com/rma to automatically obtain a number and shipping information.

When returning the unit for repair, leave all wires at the length in which you have them installed. Be sure to include a detailed account of any problems experienced, and what components and accessories are installed on the vehicle. The repaired unit will be returned as soon as possible using Ground shipping methods (ground shipping is covered by warranty). For more information, call MSD at (915) 855-7123. MSD technicians are available from 7:00 a.m. to 5:00 p.m. Monday - Friday (mountain time).

Limited Warranty

M

SD warrants this product to be free from defects in material and workmanship under its intended normal use*, when properly installed and purchased from an authorized MSD dealer, for a period of one year from the date of the original purchase. This warranty is void for any products purchased through auction websites. If found to be defective as mentioned above, it will be repaired or replaced at the option of MSD. Any item that is covered under this warranty will be returned free of charge using Ground shipping methods. This shall constitute the sole remedy of the purchaser and the sole liability of MSD. To the extent permitted by law, the foregoing is exclusive and in lieu of all other warranties or representation whether expressed or implied, including any implied warranty of merchantability or ﬁtness. In no event shall MSD or its suppliers be liable for special or consequential damages. *Intended normal use means that this item is being used as was originally intended and for the original application as sold by MSD. Any modiﬁcations to this item or if it is used on an application other than what MSD markets the product, the warranty will be void. It is the sole responsibility of the customer to determine that this item will work for the application they are intending. MSD will accept no liability for custom applications.

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FRM31778 Created 04/13 Printed in U.S.A.

MSD 2960 Installation

Specifications and Main Features

Frequently Asked Questions

User Manual