{"product_id":"20-0179-radium-engineering-fpd-xr-direct-mount-3-8-npt-fuel-pulse-damper-kit","title":"Radium Engineering FPD-XR Direct Mount 3\/8 NPT Fuel Pulse Damper Kit","description":"Part #: 20-0179\u003cbr\u003e \u003cbr\u003e\u003cp\u003e\u003cspan\u003eThe 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. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003cstrong\u003eWhat makes Radium FPDs unique?\u003c\/strong\u003e\u003cbr\u003eAlong with having the flexibilty of using common fittings, Radium Engineering FPD's use 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.\u003cbr\u003e\u003cimg src=\"http:\/\/www.radiumauto.com\/Assets\/productDESC\/product-6479.jpg\" alt=\"\" width=\"599\" height=\"400\"\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWhat is the difference between FPD-R and FPD-XR?\u003c\/strong\u003e\u003c\/span\u003e \u003cbr\u003e\u003cspan\u003eThe FPD-R (green top) is slightly shorter than the FPD-XR (black top) allowing it to be used in space-contrained applications.\u003cbr\u003e\u003cimg src=\"http:\/\/www.radiumauto.com\/Assets\/productDESC\/fpdimensions.png\" alt=\"\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWHICH DAMPER DO I CHOOSE?\u003c\/strong\u003e\u003cbr\u003eThe FPD-\u003cstrong\u003eR\u003c\/strong\u003e (Fuel Pulse Damper-\u003cstrong\u003eRange\u003c\/strong\u003e) and FPD-\u003cstrong\u003eXR\u003c\/strong\u003e (Fuel Pulse Damper-\u003cstrong\u003eExtra Range\u003c\/strong\u003e) both have unique \u003c\/span\u003e\u003cspan\u003ebase \"static\" fuel pressure requirements:\u003c\/span\u003e\u003cstrong\u003e\u003cbr\u003e\u003cspan\u003eFPD-R base pressure requirement = 40 - 70psi (static)\u003c\/span\u003e\u003cbr\u003e\u003c\/strong\u003e\u003cspan\u003e\u003cstrong\u003eFPD-XR base pressure requirement = 40 - 120psi (static)\u003cbr\u003e\u003c\/strong\u003e\u003cem\u003eBase pressure is the fuel pressure measured when the fuel pump is running WITHOUT a vacuum line connected to the regulator.\u003c\/em\u003e\u003cstrong\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eIMPORTANT:\u003c\/strong\u003e The ranges above are base static fuel pressures only. Any dynamic fuel pressure created by a rising-rate FPR outside of this range is acceptable,\u003c\/span\u003e\u003cspan\u003e but only when the base \"static\" fuel pressure is set within these ranges and the vacuum\/boost reference line is connected.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cem\u003e\u003cstrong\u003eExample 1:\u003c\/strong\u003e \u003c\/em\u003e\u003cbr\u003e\u003cem\u003e\u003cstrong\u003eVehicle:\u003c\/strong\u003e Mitsubishi EVO\u003c\/em\u003e\u003cbr\u003e\u003cem\u003e\u003cstrong\u003eOEM Base Static Fuel Pressure:\u003c\/strong\u003e 43.5psi\u003c\/em\u003e\u003cbr\u003e\u003cem\u003e\u003cstrong\u003eBoost Pressure:\u003c\/strong\u003e 20psi\u003cbr\u003e\u003c\/em\u003e\u003cstrong\u003eRising Rate Pressure Regulator?:\u003c\/strong\u003e Yes\u003cbr\u003e\u003cem\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e Even though fuel pressure is 63.5psi at full boost, either FPD-R or FPD-XR can work in this example because the base static pressure was set within the requirements. Vacuum\/boost reference line must be hooked up to the FPD.\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cem\u003e\u003cstrong\u003eExample\u003c\/strong\u003e\u003cstrong\u003e 2:\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eVehicle:\u003c\/strong\u003e BMW E46 M3\u003c\/em\u003e\u003cbr\u003e\u003cem\u003e\u003cstrong\u003eOEM Base Static Fuel Pressure:\u003c\/strong\u003e 72.5psi\u003c\/em\u003e\u003cbr\u003e\u003cem\u003e\u003cstrong\u003eBoost Pressure:\u003c\/strong\u003e 20psi\u003cbr\u003e\u003c\/em\u003e\u003cstrong\u003eRising Rate Pressure Regulator?:\u003c\/strong\u003e Yes\u003cbr\u003e\u003cem\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e Even though fuel pressure is 92.5psi at full boost, the FPD-XR will work in this example because the base static pressure was set within the requirements. The FPD-R cannot be used in this scenario. Vacuum\/boost reference line must be hooked up to the FPD.\u003c\/em\u003e\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003eFeatures\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003eThe anodized aluminum housing features two selectable threaded male fittings. The 8AN ORB (3\/4\"-16 UNF threads) version seals using a Viton O-ring while the 3\/8\" NPT variation seals with the tapered pipe threads\u003c\/span\u003e\u003cspan\u003e.\u003cbr\u003e\u003cimg src=\"http:\/\/www.radiumauto.com\/Assets\/productDESC\/product-6477.jpg\" alt=\"\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003eThe FPDs can be mounted at any possible angle including upside down. For best results, the damper should be mounted directly onto the fuel rail(s). \u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003eThis product is safe for use with all fuel types including alcohol blends such as E85. \u003c\/span\u003e\u003cspan\u003eDownload the installation instructions for more info. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIncluded\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e-Anodized and laser engraved aluminum top, R=range or XR=extra range\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e-Anodized aluminum body with male threads, 8AN ORB or 3\/8\" NPT\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e-Stainless steel hardware\u003cbr\u003e-Rubber vacuum hose, 4mm ID\u003cbr\u003e-Vacuum hose Y-fitting \u003cbr\u003e\u003cimg src=\"http:\/\/www.radiumauto.com\/Assets\/productDESC\/product-6487.jpg\" alt=\"\" width=\"599\" height=\"400\"\u003e \u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e This item is non application specific. Please verify compatibility before purchase. May require some modification for proper installation. \u003cp\u003e\u003cstrong\u003e\u003cu\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n","brand":"Radium Engineering","offers":[{"title":"Default Title","offer_id":895671205907,"sku":"rad20-0179","price":94.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1398\/9853\/products\/Radium-Engineering-FPD-XR-Direct-Mount-38-NPT-Fuel-Pulse-Damper-Kit.jpg?v=1743766918","url":"https:\/\/www.importimageracing.com\/products\/20-0179-radium-engineering-fpd-xr-direct-mount-3-8-npt-fuel-pulse-damper-kit","provider":"Import Image Racing","version":"1.0","type":"link"}