MSD 2922 Fuel Pump Return Kit Installation - Manual

M S D
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CAPABILITIES
The Atomic Adjustable Regulator is configured for a single -6AN inlet, and dual -6AN outlets (for
regulator-to-tank line routing flexibility). The recommended operating range is 0-90 psig (pounds
per square inch gauge). The maximum recommended flow rate is 500 liters/hour (2.2 GPM). The
vacuum/boost compensation ratio is 1:1.
RECOMMENDED PLUMBING SCHEMATICS
Use the schematic below as a guide when installing the kit in conjunction with an Atomic throttle body
EFI system. There are two possible connection points on the throttle body unit, one of which will be
the fuel supply in an operational system. DO NOT “tee” into the supply line and leave the -6AN port
plug installed in the remaining throttle body port. Remove the -6AN port plug from the throttle body
and route fuel from that port to the regulator inlet port (using the supplied hose and fittings). The
hose length between the throttle body and regulator is not critical, but generally speaking, should be
kept to a minimum. Route and secure the hose as necessary to prevent chafing, stretching due to
engine movement, and heat-related damage.
Atomic EFI Return System
PN 2922
Thank you for selecting the Atomic Fuel Line Return kit. This kit is recommended for use with the
Atomic Throttle Body EFI and Atomic LS EFI systems.
1 - Regulator Parts Bag includes:
1 - Regulator Mounting Bracket
1 - Brass Hose Barb Fitting
1 - Stainless Steel Pipe Plug
2 - 10-32 x 0.375 Button Head Cap Screws
1 - High Pressure Fuel Hose Clamp
Parts Included:
1 - Adjustable Regulator
1 - -6AN Port Plug
3 - -6AN Straight Port Fittings
2 - -6AN 90° Push-Lock Fittings
2 - -6AN Straight Push-Lock Fittings
15 Feet - High Pressure Fuel Hose
FUEL
FILTER
FUEL TANK
FUEL
PUMP
AFTERMARKET
ADJUSTABLE
REGULATOR
FUEL
FILTER
FUEL TANK
FUEL
PUMP
MSD ADJUSTABLE
REGULATOR
CORRECT FOR RETURN STYLE FUEL SYSTEM.
Figure 1 Atomic TBI Return Fuel System.