Aeromotive 13351 - PLATINUM SERIES UNIVERSAL BYPASS REGULATOR - Manual (Page 2)

The following steps are typical of most installations:
1. Once the engine has been allowed to cool, disconnect the negative battery cable and relieve the fuel
system pressure.
2. Remove any cosmetic covers necessary to allow access to the fuel pressure regulator.
3. Remove the vacuum line from the regulator.
4. Place shop towels around the regulator to catch any gasoline that is spilled during this step of the
installation. Remove any regulator mounting hardware and connecting fuel lines, then carefully
remove the regulator.
5. Find a suitable place in the vehicle’s engine compartment to mount the Aeromotive regulator. Using
the supplied mounting bracket as a template, mark the bracket mounting hole and drill to accept
mounting bolt.
6. Determine approximate fuel pressure your system will require. If your fuel pressure requirement is
between 3 and 20 psi, the factory installed regulator spring is the proper spring. If your fuel pressure
requirement is between 20 and 65 psi, insure the pressure adjustment set screw is backed out all the
way, remove the 4 cover screws and cover, remove the factory installed spring, replace it with the high
pressure spring, and reassemble the regulator.
7. With the bracket attached to the regulator, mount the regulator to the vehicle.
8. Attach the fuel supply line(s) to the regulator using any of the 3/8-NPT ports located around the
perimeter of the regulator. Install 3/8-NPT pipe plugs into any of the unused regulator inlet ports.
Please note that these ports are pipe threads and will require the use of a pipe thread sealant.
9. Attach the fuel return line to the 3/8-NPT port located on the bottom of the regulator. Use the chart
below to determine the minimum recommended return line size for your system. Please note that
these ports are pipe threads and will require the use of a pipe thread sealant.
Regulator with 3-20 psi spring
Fuel Line ID Chart
Fuel Pump Free Flow Rating (GPH)
Return Line
Length (ft.) 1 to 60
GPH 60 to 120
GPH 120 to 180
GPH 180 to 250
GPH
0-5 feet 3/8” 3/8” 1/2” 1/2”
5-10 feet 3/8” 1/2” 1/2” 5/8”
10-15 feet 3/8” 1/2” 5/8” 3/4”
15-20 feet 1/2” 1/2” 5/8 3/4”
Regulator with 20-65 psi spring
Fuel Line ID Chart
Fuel Pump Free Flow Rating (GPH)
Return Line
Length (ft.) 1 to 60
GPH 60 to 120
GPH 120 to 180
GPH 180 to 250
GPH
0-5 feet 3/8” 3/8” 3/8” 3/8”
5-10 feet 3/8” 3/8” 3/8” 3/8”
10-15 feet 3/8” 3/8” 3/8” 1/2”
15-20 feet 3/8 3/8” 3/8” 1/2“