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The opening and closing of fuel injectors creates pressure pulses in the fuel rail which 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.
The inline damper is perfect for applications where there is no option for direct fuel rail mounting.
FPD-R VS. FPD-XR
The FPD-R is shorter than the FPD-XR, allowing it to be used in applications with little clearance. It also has a lower base fuel pressure requirement.
The FPD-R measures in at 1.98" tall and has a base "static" fuel pressure requirement of 40-70psi. The FPD-XR measures in at 2.60" tall and has a base 'static' fuel pressure requirement of 40-150psi.
Want more technical information? Read the Radium blog post HERE.
The inline dampers are offered in three different versions and a selection should be made based on the type of hose connection needed.
The -01 version is a great option when using 5/16" rubber fuel hoses. Hose clamps are required.
The -06 version comes with adapter fittings for connecting -6AN hoses
The -08 version comes with adapter fittings for connecting -8AN hoses
*versions are related to the part number. You're currently viewing -06 version.
-Anodized/laser engraved aluminum top, R=range or XR=extra range
-Anodized aluminum body with female -8AN ORB ports
-Anodized aluminum ORB adapter fittings, selectable size
-Gasoline and alcohol (E85) resistant diaphragm
-Stainless steel M6 mounting bolts and nuts
-Rubber vacuum hose, 4mm ID
-Vacuum hose Y-fitting
-1/8" NPT plug
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You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
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