RADIUM ENGINEERING FUEL PULSE DAMPERS

RADIUM ENGINEERING FUEL PULSE DAMPERS

Radium Engineering has developed high performance fuel pulse dampers for both direct mount and in-line configurations. Turn 14 Distribution will be stocking all of these part numbers. This innovative new product is ideal for vehicles with upgraded fuel injectors which effect consistent fuel pressures. Details on these new fuel pulse dampers are listed below.

What is a fuel pulse damper?

A fuel pulse damper is used in fuel injection systems to attenuate pressure pulsations generated by the fuel pump and by the injectors opening and closing. These hydraulic pulses can cause an undesirable noise, which can be transmitted to the passenger compartment. These pulsations are often undetectable with a liquid-filled analog mechanical fuel pressure gauge because they happen so quickly. The fuel pulse damper works by allowing the volume of the fuel system to change slightly to absorb the pulses. This is done with a spring loaded flexible diaphragm.

Not only do the pulsations have an undesirable effect on cabin NVH (noise vibration and harshness), they can also contribute to mysterious lean spots in fuel delivery. These are often the result of the hydraulic pulses acting in harmonic resonance with the injectors opening and closing. In some vehicles, these lean spots can result in stumbling during acceleration.

How do Radium Engineering fuel pulse dampers improve fuel delivery?

Most boosted engines use a pressure referenced regulator where fuel pressure rises 1:1 as boost pressure rises. If the damper is tuned from the factory for a specific single fuel pressure, then it becomes ineffective as fuel pressure rises outside of the normal range. To address this issue, Radium has designed the first aftermarket vacuum referenced fuel pulse damper. Radium Engineering Fuel Pulse Dampers are CNC machined from aluminum, anodized, and laser engraved. They are resistant to all fuel types including alcohol blends such as E85. This new FPD design maintains full damping function throughout the range of pressures seen in the fuel system of a boosted engine with a 1:1 vacuum referenced regulator.

Direct Mount Fuel Pulse Dampers

Radium Engineering offers two designs of their direct mount fuel pulse dampers. The FPD-R (green top) is slightly shorter than the FPD-XR (black top) allowing it to be used in space-constrained applications.

FPD-R base pressure requirement = 40 - 45psi (static) 
FPD-XR base pressure requirement = 43 - 78psi (static)

Parts Included

  • Anodized and laser engraved aluminum top, R=range or XR=extra range
  • Anodized aluminum body with male threads, 8AN ORB or 3/8" NPT
  • Stainless steel hardware
  • Rubber vacuum hose, 4mm ID
  • Vacuum hose Y-fitting

Part Numbers

FPD-R, 8AN ORB
Retail: $89.95
 
FPD-XR, 8AN ORB
Retail: $99.95
 
FPD-R, 3/8 NPT
Retail: $89.95
FPD-XR, 3/8 NPT
Retail: $99.95

In-Line Fuel Pulse Dampers

The FPD-R (green top) is slightly shorter than the FPD-XR (black top) allowing it to be used in space- constrained applications.

FPD-R base pressure requirement = 40 - 45psi (static) 
FPD-XR base pressure requirement = 43 - 78psi (static)

Parts Included

- Anodized/laser engraved aluminum top, R=range or XR=extra range 
- Anodized aluminum body threaded for -8AN ORB fittings 
- Anodized aluminum O-ring sealed adapter fittings, selectable size 
- Stainless steel M6 mounting bolts and nuts 
- Rubber vacuum hose, 4mm ID 
- Vacuum hose Y-fitting

Part Numbers

FPD-R, Inline, 6AN
Retail: $119.95
 
FPD-R, Inline, 8AN
Retail: $119.95
FPD-R, Inline, 8AN
Retail: $119.95
FPD-XR, Inline, 6AN
Retail: $129.95
 
Inline, 8AN
Retail: $119.95
FPD-XR, Inline, 8AN
Retail: $129.95
FPD-XR, Inline, 10AN
Retail: $129.95