Radium FPR Kit RA-Series MX-5 NA/NB/NBFL
Product information "Radium FPR Kit RA-Series MX-5 NA/NB/NBFL"
This kit includes a new adjustable fuel pressure regulator (FPR), compatible with all fuel pump holders, including the factory returnless system of the NB chassis. As shown below, the FPR is mounted near the EVAP charcoal filter using the factory threaded studs.
The factory fuel line from the fuel pump to the fuel filter remains unchanged. However, two new 6AN fuel lines (see images) are included for the feed and return of the FPR.
A fuel pressure gauge is mounted directly next to the FPR on the feed line for easy adjustment. A stainless steel SAE quick disconnect plug is included to seal the "TEE" of the OEM feed line.
1:1 RISING RATE VACUUM REFERENCE
The RA series regulator features a 360-degree rotatable vacuum port, sealed with a dual O-ring—a first in the industry. This allows the installer to align the vacuum port in any direction without tools. Four interchangeable 10-32 threaded fittings for vacuum reference are included to cover all scenarios:
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Hose Barb: A black zinc-plated 3/16" (5 mm) barb fitting made of high-strength steel, compatible with the following vacuum hoses: 5/32" (4 mm), 3/16" (5 mm), and 7/32" (6 mm).
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-03 AN / Dash 3 Male Fitting: A black zinc-plated adapter made of high-strength steel, compatible with 3AN hose fittings.
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Push-to-Connect: A nickel-plated brass fitting with Buna-N O-rings, compatible with 1/4" (6.35 mm) outer diameter hard plastic tubing.
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Vacuum Plug: A black oxide-coated stainless steel screw to maintain a constant (non-dynamic) fuel pressure. To maintain the fuel pressure as in the OEM MX-5 fuel system, this plug should be used.
NOTE: When installing the vacuum fitting, the use of a medium-strength, wicking thread locker is recommended.
FUEL COMPATIBILITY
This system is compatible with all types of gasoline, including unleaded, leaded, oxygenated, and premixed fuel. It is also suitable for alcohol-based fuel mixtures such as methanol, ethanol, and E85.
NOTES
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No permanent modifications required.
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Compatible with Radium Engineering 20-1020 Mazda MX-5 fuel pump holder/surge tank.
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Compatible with the OEM fuel pump holder (the instructions describe how to bypass the OEM FPR).
INCLUDED
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MPR-RA fuel pressure regulator
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Fuel pressure gauge, 0-100 psi
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Stainless steel mounting bracket
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Anodized aluminum fittings
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SAE quick disconnect fittings
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Hose clamps and mounting hardware
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6AN (3/8") fuel hose