PN29387 Datasheet, PDF (1/4 Pages) Mallory performance club – 3-Port Competition Fuel Pressure Regulator

3-Port Competition
Fuel Pressure Regulator
(Return Style)
PN 29387
IMPORTANT: This regulator must use a fuel return line. The fuel return line runs between the fuel return
port of the regulator and the fuel tank. Fuel pressures cannot be adjusted if the fuel return
line is absent.
Parts Included:
1 - 3-Port Fuel Pressure Regulator, 3-12 PSI 1 - Kit, High Pressure Springs (not included with
1 - Bracket
Mallory Fuel 140 Series Electric Fuel Pump
1 - Power Module
Kit Part Nos. 4142 and 4142A):
2 - Bracket Mounting Screws
1 - Medium Spring (0.484" O.D.)
1 - Bypass Spacer (to modify Mallory Fuel 110 1 - Large Spring (0.640" O.D.)
and 140 Series Electric Fuel Pumps)
1 - Spring Spacer/Washer
SPECIFICATIONS:
Port thread sizes (ALL): 3/8" NPT
Adjustment range: 3-65 PSI
Fuel Application:
Part No. 4309, Gasoline, Automotive/Street and Racing applications;
Part No. 4310, Alcohol/Methanol, Automotive/Street and Racing applications.
GENERAL INFORMATION
Mallory's 3-Port, return style regulator
regulates fuel pressure between high pressure
fuel pumps and carburetors or fuel injection
systems. The regulator is recommended for
Mallory Fuel 60FI, 110, 110FI, and 140 Series
Electric Fuel Pumps.
By returning excess fuel and fuel pressure
to the fuel tank, this regulator benefits fuel
pumps in several ways. The fuel pump will run
cooler, draw less current and will always have
full volume output available at the pressure
setting. The fuel return line runs between
the fuel return port of the regulator and the
top of the fuel tank. The fuel tank must have
provisions for a fuel return line.
This regulator is equipped with a vacuum/boost compensation port (brass barb fitting) that can be
used to momentarily decrease fuel pressure (vacuum compensation) at idle and part throttle, or
increase fuel pressure under blower boost (boost compensation). While it is not necessary to connect
a hose to the vacuum/boost compensation port, it may be beneficial in some cases. However, the
small plug on the barb must be removed before use.
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