FPD-R Inline Fuel Pulse Damper by Radium Engineering

The opening and closing of fuel injectors creates pressure pulses in the fuel rail; this can lead to unstable fuel pressure. In order to achieve a safe and consistent rail pressure, a fuel pulse damper (FPD) is often necessary. The FPD’s internal diaphragm will absorb oscillating pulses and stabilize fuel pressure. This correction can be measured throughout the RPM range and can often help idle surge, especially with high flow injectors. Furthermore, a fuel pulse damper can help solve erratic lean air/fuel ratio spikes, commonly experienced as ‘stumbling’, that are difficult to tune out.

Fuel pulse dampers can be mounted at any angle, including upside down. There are many variables that dictate if a fuel system requires fuel pulse dampers. For instance, there are cases where multiple dampers are necessary. There are also other times when the fuel system benefits with a fuel pulse damper on the return line.

The kit features an anodized aluminum housing with a large 0.69″ center bore that uses two in-line inlet/outlet ports that are machined with 3/4″-16 UNF threads for 8AN ORB fittings. Depending on the size of the fuel feed hose used, there are 3 kits to choose from which include different male adapter fittings (-6AN, -8AN, -10AN). These fittings seal to the billet housing using Viton O-rings.

This product is safe for use with all fuel types including alcohol blends such as E85.

Please Note: DAMPERS CAN NOT BE USED WITH MECHANICAL FUEL PUMPS -OR- DIRECT INJECTION.

Features

• 8AN ORB versions seal using a FKM O-ring
• Two in-line inlet/outlet ports machined with 3/4″-16 UNF threads for 8AN ORB fittings
• At 1.98″ tall, the FPD-R can be used in space-contrained applications
• FPD-R base pressure requirement = 40 – 70psi (static)
• The 3/8″ NPT variations seal with the tapered pipe threads (sealant should be used)
• Even after tightening, the newest 8AN ORB dampers (20-0776 and 20-0777) will swivel. This allows the vacuum port to be clocked 360 degrees.
• Because 20-0178 and 20-0179 use tapered threads (NPT), the vacuum port can be clocked to the desired location during tightening

Applications

• Universal

What’s In The Box?

• 1 – Anodized & laser engraved aluminum top
• 1 – Anodized aluminum body with male threads – 8AN ORB or 3/8″ NPT
• Stainless steel hardware
• 1 – 4mm ID Rubber vacuum hose
• 1 – Vacuum hose Y-fitting

References

• Installation Instructions

Warranty

• Manufacturer Standard Warranty