Radium Engineering Fuel Pulse Damper (FPD-XR) CLEARANCE - Universal

Perfect match to go with the Radium Engineering Fuel Pressure Gauge that is in the clearance!

Radium Engineering Fuel Pulse Damper uses a vacuum/boost reference port which allows for proper fuel pulse damper performance even at elevated fuel pressures. This becomes essential for boosted systems that use a 1:1 rising rate fuel pressure regulator.

What is the difference between FPD-R and FPD-XR? 
At 1.98" tall, the FPD-R (green top) is slightly shorter than the 2.60" FPD-XR (black top) allowing it to be used in space-contrained applications. But the FPD-XR has a wider response range. Radium recommends to use the FPD-XR if you have the space.

FPD-XR base pressure requirement = 40 - 105psi (static)
Base pressure is the fuel pressure measured when the fuel pump is running WITHOUT a vacuum line connected to the regulator.

IMPORTANT: The range above is base static fuel pressures only. Any dynamic fuel pressure created by a rising-rate FPR outside of this range is acceptable, but only when the base "static" fuel pressure is set within these ranges and the vacuum/boost reference line is connected.

Example 1: 
Vehicle: Mitsubishi EVO
OEM Base Static Fuel Pressure: 43.5psi
Boost Pressure: 30psi
Rising Rate Pressure Regulator? Yes
Can I use a FPD-R? Yes. Even though fuel pressure is 73.5psi at full boost, the FPD-R will work because the base static pressure was set within the 40-70psi requirement. However, the vacuum/boost reference line must be installed. 
Can I use a FPD-XR? Yes. Also, the vacuum/boost reference line does not need to be installed since maximum fuel pressure does not exceed 105psi. 

Example 2:
Vehicle: BMW E46 M3
OEM Base Static Fuel Pressure: 72.5psi
Boost Pressure: 20psi
Rising Rate Pressure Regulator? Yes
Can I use a FPD-R? No. Base static fuel pressure exceeds the 40-70psi requirement.
Can I use a FPD-XR? Yes. Also, the vacuum/boost reference line does not need to be installed since maximum fuel pressure does not exceed 105psi.

Features
An anodized aluminum housing with a large 0.69" center bore. Uses two in-line inlet/outlet ports machined with 3/4"-16 UNF threads for 8AN ORB fittings, with 6AN male adapter fittings. Fittings are sealed to the billet housing using FKM O-rings.  

An 1/8" NPT female port is threaded into the center of the fuel pulse damper. A fuel pressure gauge is commonly used here, or other sensors for pressure or temperature data.

Using the supplied M6 bolts/nuts, the kit can be mounted at any possible angle including upside down. For best results, the damper should be plumbed as close to the fuel rail(s) as possible. Like any fuel system part, the FPD kit should be kept away from excessive heat areas. This product is safe for use with all fuel types including alcohol blends such as E85. 

Included
-Anodized XR=extra range aluminum top
-Anodized aluminum body with female -8AN ORB ports
-Anodized aluminum ORB adapter fittings, -6AN male size
-Gasoline and alcohol (E85) resistant diaphragm
-Stainless steel M6x1mm mounting bolts/nuts
-Rubber vacuum hose, 4mm ID
-Vacuum hose Y-fitting 
-1/8" NPT plug