Owners manual

INSTALLATION INSTRUCTIONS 3
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RETURN STYLE FUEL SYSTEM
The most efficient system is to return the fuel from the opposite outlet of the throttle body see Figure 3.
The fuel pressure required for a return fuel system is approximately 45-psi. If you get "INJ DC" error code
in diagnostics increase pressure and test again. Do not exceed 60-psi.
Figure 3
AFTERMARKET
ADJUSTABLE
REGULATOR
FUEL
FILTER
FUEL TANK
MSD ADJUSTABLE
REGULATOR
CONNECT ORANGE WIRE FROM
ATOMIC TO RED TERMINAL (12V)
-6AN
CAP AND BANJO
FITTING
SUPPLIED
CONNECT
SUPPLIED
GROUND WIRE
TO BLUE
TERMINAL
(GROUND)
-8AN FITTING
SUPPLIED
FUEL
PUMP
FUEL
FILTER
FUEL
PUMP
FUEL TANK
1/2” ID FUEL LINE
REQUIRED TO THE TANK
(NOT SUPPLIED)
SUPPLIED 3/8”
FUEL LINE
CORRECT FOR RETURN
STYLE FUEL SYSTEM.
NOTE: DO NOT USE TUBING
(HARD FUEL LINES) WITH
THE ATOMIC EFI SYSTEM.
Figure 4
AFTERMARKET
ADJUSTABLE
REGULATOR
FUEL
FILTER
FUEL TANK
MSD ADJUSTABLE
REGULATOR
CONNECT ORANGE WIRE FROM
ATOMIC TO RED TERMINAL (12V)
-6AN
CAP AND BANJO
FITTING
SUPPLIED
CONNECT
SUPPLIED
GROUND WIRE
TO BLUE
TERMINAL
(GROUND)
-8AN FITTING
SUPPLIED
FUEL
PUMP
FUEL
FILTER
FUEL
PUMP
FUEL TANK
1/2” ID FUEL LINE
REQUIRED TO THE TANK
(NOT SUPPLIED)
SUPPLIED 3/8”
FUEL LINE
INCORRECT