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INSTALLATION INSTRUCTIONS

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, MOUNT

THE PUMP WITHIN 2-FEET OF THE

FUEL TANK SENDING UNIT.

FUEL RAIL

(UNDER COVER)

FUEL RAIL

(UNDER COVER)

FUEL RAIL

(UNDER COVER)

-6 90

FITTING SUPPLIED

NOTE: IF RUNNING A RETURNLESS

FUEL SYSTEM, THE PUMP MUST

BE MOUNTED IN THE TANK.

MSD ADJUSTABLE

REGULATOR

Figure 1 Atomic LS Return Fuel System.

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. 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 your

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 -6AN-to-hose 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. The pump will support approximately 650

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

WARNING:

MSD's hose fittings are designed for use with MSD fuel hose only. Do not use the MSD

fuel hose with other fittings. Do not use MSD fittings with other fuel hose. Compatibility

issues may cause fuel leaks.

Содержание Atomic LS EFI 2950

Страница 1: ...B approved for use on emission controlled vehicles This system is designed to control the EFI and ignition on LS based engines being retro fit into older vehicles that do not require emission controls Parts Required Not Included Injector O Rings Fuel System Fuel Pump Regulator Line LS1 and LS6 Installation Kit PN 2955 For use with Master Kit PN 2950 Provides the correct brackets and EV 1 injector ...

Страница 2: ...ks receive power from the Power Module and communicate to the system through MSD s CAN Bus network To install the rails to the intake manifold the covers will need to be removed which is outlined in the instructions Each bank has OEM connectors that plug into the injectors coils and specific sensors of the engine Each bank has a ground wire that must be connected to the block The fuel line inlets ...

Страница 3: ...mit This is temporarily activated through the Dark Blue wire of the Power Module to produce consistent launch rpm Aftermarket Auxiliary Settings The Atomic LS system can support aftermarket performance parts or power adders that carry a CARB Executive Order number There are accessory controls to properly adjust the timing and fuel delivery to meet the requirements of these auxiliary components See...

Страница 4: ...ifications 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 your 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 fo...

Страница 5: ...here 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 2 c Never place a WBO2 on the outsid...

Страница 6: ...wing the sensor connectors and location as shown in Figure 9 on page 8 2 Figure4showsthelocationforthefuel rail brackets Remove the hardware from the intake manifold and install the brackets as shown using the supplied longer intake bolts Use GM 1245383 thread sealant or equivalent on the intake manifold bolts Note that the passenger rear bracket requires a spacer supplied as shown in Figure 4 Tor...

Страница 7: ...tinue with the other three injectors 5 With the injectors installed it is time to install the fuel rail assembly to the engine Position the rail assembly over the intake manifold with the injectors aligning with their mounting pockets on the intake Figure 7 6 With the injectors lined up lightly press down on the fuel rail using caution not to bind any of the injectors or connectors The fuel rail a...

Страница 8: ...ODIES FOR ENGINES WITH V V T OPTIONS NOT USED Figure 9 Fuel Rails and Connections Figure 8 Tighten the Fuel Rail Bolts 7 Install the retaining bolts and washers to secure the fuel ECU rails to the mounting brackets Move between the retainers as they are tightened to ensure even pressure Figure 8 8 Connect the injector wiring coil packs and other wiring 9 Repeat Figure 9 the procedure for the oppos...

Страница 9: ... should be perpendicular to the hose axis Figure 11 2 Before installing the hose to the fitting it is important to anchor the fitting Figure 12 Proper installation may be difficult when holding the hose and fitting with your hands For best results the hose should be installed with minimal twisting or pausing 3 Apply a light coating of oil to the rib on the fitting Use care not to get oil on the ou...

Страница 10: ...it 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 glovebox When a suitable location is found make sure all wires reach their connections Also be sure that the CAN port can be accessed for use with the Handheld Monitor Use the Power Module as a template and mark the locat...

Страница 11: ...CONNECTOR GT Series 16 Way STOP HERE REVIEW YOUR INSTALLATION It is recommended to review your installation at this point The 02 Sensor should be installed and connected as well as the Power Module and corresponding wiring Confirm that all of the rail wiring connections are complete including the injectors and sensors Ensure all fuel lines and fittings are tight and secure from any heat sources or...

Страница 12: ...omic LS select Initial Setup Figure 17 Atomic LS Dash This selection allows you to view a variety of engine functions in real time when the engine is running Refer to page 19 for a complete description of each parameter in the Atomic Dash 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 ...

Страница 13: ...size The range is from 100 800 cubic inches Figure 18 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 are not recommended for use with the Atomic LS system Figure 18 Coils Camshaft Type Handheld Main Menu Engine Type Engine Size Figu...

Страница 14: ...m Basic to Advanced the MAP sensor selection menu will open up to all the MAP Sensor combinations preprogrammed into the Atomic LS system This setting will also unlock a setting called User Defined User Defined allows the Slope and offset to manually be entered by selecting Set Calibration Fuel Pump Type There are three selections for the fuel pump system Select the system in use with the Atomic L...

Страница 15: ...tings 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 ADVANCED SETUP The Advanced Setup features are optional as the Initial Setup menu provides the Atomic EFI with the valu...

Страница 16: ... afeaturetoincreasefueldeliverybyaprescribedpercentage any time there is an increase in throttle position If needed makesmallchangesinnomorethan5 incrementswithout further testing Most engines will find 25 sufficient Most applications will accept 15 35 enrichment Adjustable from 0 100 in 1 increments Figure 21 MAP Enrichment To assist in manifold pressure transitions the Atomic EFI offers a MAP en...

Страница 17: ...le such as comming off of a hill between moving and coming to a complete 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 ...

Страница 18: ...or flow rate and MAP sensor Slope and Offset can be manually entered by selecting user defined in the selection menu Figure 23 Set Atomic Defaults This setting resets all the programming parameters to the default settings out of the box Figure 23 Firmware Versions The Atomic Firmware version can be found in this section Figure 23 PRE START CHECK LIST Before attempting to start the motor run throug...

Страница 19: ...OLTS Displays battery voltage A F RATIO Displays air fuel ratio INJ DUTY Displays injector duty cycle IGN TIMING Displays ignition timing IAC POS Displays idle air control motor position THROTTLE Displays throttle condition closed part WOT Wide Open Throttle CLOSED LOOP Displays closed loop on or off LEARNING Displays Atomic LS learning on or off FAN 1 Displays Fan 1 on or off FAN 2 Displays Fan 2...

Страница 20: ...orking cor rectly 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 the Atomic s system ca pabilities Faulty sensor loose or no connection Check wiring and or re place sen...

Страница 21: ...this if you do already not have a reader they can be found at most electronics stores a Open the Micro SD card s window on your computer b Drag and drop the MSD files into the folder c The files must remain in the main folder do NOT put them in a sub folder 4 Move the Micro SD card to the Atomic EFI s Handheld 5 Ensure the Handheld is plugged in to the Power Module 6 Turn the vehicle s ignition sw...

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