Owners manual

INSTALLATION INSTRUCTIONS 3
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REGULATOR CONNECTIONS AND ADJUSTMENT
The regulator inlet port is located on the bottom surface, and clearly marked with an identifier machined in
the housing (see Figure 4 below). Two (2) outlet ports are available, but typically only one (1) will be used.
Install the supplied -6AN port plug in the unused outlet port using a 5/16-inch hex key (Allen wrench). The
-6AN straight port fittings should be snugged with an 11/16-inch wrench or deep socket.
Install the supplied 1/8-27 NPT brass hose barb fitting in the upper regulator housing (see Figure 4
below) using a 7/16-inch wrench or deep socket. Thread sealer is not required on this fitting, but can be
used if desired. Connect an intake manifold vacuum / boost source to this fitting, or leave it open to the
atmosphere if manifold pressure compensation is not required. DO NOT plug this opening. Ensure that
contaminants (such as water and road spray) cannot enter the open fitting. In the event that vacuum /
boost reference is not required, a more cosmetically pleasing option is to install a sintered metal exhaust
muffler in this port (such as McMaster-Carr PN 4450K1-Bronze or PN 4402K51-Stainless Steel)
The 1/8-27 NPT port in the lower housing allows the installation of a fuel pressure gauge (direct or remote-
reading). If use of this port is not required, install the supplied stainless steel pipe plug using a 3/16-inch
hex key (Allen wrench). Use of a fuel compatible paste-type thread sealer is REQUIRED on this plug.
Thread sealing tape is also an option, but not recommended due to the potential for particulate and debris
generation.
Use a 5/32-inch hex key (Allen wrench) to
adjust the regulator set point. Clockwise
rotation (screw advancing inward) increases
the set point, and counter-clockwise rotation
(screw advancing outward) decreases the set
point. When the desired set point has been
reached, snug the jam nut using a ½-inch
wrench.
Refer to the user installation instructions,
supplied with the Atomic EFI kit, for regulator
set point recommendations.
Figure 4 Regulator Feature Identification Guide
MOUNTING
BRACKET
VACUUM / BOOST
REFERENCE PORT
(1/8-27 NPT)
OUTLET PORT
(1 OF 2)
ADJUSTMENT SCREW
AND LOCK NUT
INLET PORT
GAUGE PORT
(1/8-27 NPT)
OUTLET PORT
(2 OF 2)