{"product_id":"radium-fuel-pulse-damper-direct-mount-kit","title":"Radium Fuel Pulse Damper Direct Mount Kit","description":"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.\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000;\"\u003eVehicle Fitment:\u003c\/span\u003e\u003cbr\u003eUniversal Product\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000;\"\u003eInstall Instructions:\u003c\/span\u003e\u003cbr\u003e\u003ca style=\"color: #afafaf; text-decoration: underline;\" href=\"http:\/\/data.radiumauto.com\/PublicDocs\/19-0097G.PDF\" target=\"blank\"\u003e Download PDF\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable border=\"0\" cellpadding=\"0\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr bgcolor=\"2d2d2d\"\u003e\n\u003ctd style=\"color: #ffffff;\"\u003ePart Number:\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eSize:\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eColor:\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eNotes:\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"404040\"\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e20-0776\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e-8AN FPD-R (Range)\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eGreen\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eOld PN 20-0176\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"2d2d2d\"\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e20-0777\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e-8AN FPD-XR (Extra Range)\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eBlack\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eOld PN 20-0177\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"404040\"\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e20-0178\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e3\/8\" NPT FPD-R (Range)\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eGreen\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr bgcolor=\"2d2d2d\"\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e20-0179\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e3\/8\" NPT FPD-XR (Extra Range)\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003eBlack\u003c\/td\u003e\n\u003ctd style=\"color: #ffffff;\"\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\u003cspan style=\"color: #ff0000;\"\u003eFull Description:\u003c\/span\u003e\u003cbr\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. \u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000;\"\u003eWhat makes Radium FPDs unique?\u003c\/span\u003e\u003cbr\u003eAlong with having the flexibility 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\u003cbr\u003e\u003cspan style=\"color: #ff0000;\"\u003eWhat is the difference between FPD-R and FPD-XR? \u003c\/span\u003e\u003cbr\u003eThe FPD-R (green top) is slightly shorter than the FPD-XR (black top) allowing it to be used in space-constrained applications.\u003cbr\u003e• FPD-R = Range\u003cbr\u003e• FPD-XR = Extra Range\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000;\"\u003eWhich Damper Do I Choose?\u003c\/span\u003e\u003cbr\u003eThe FPD-R (Fuel Pulse Damper-Range) and FPD-XR (Fuel Pulse Damper-Extra Range) both have unique base \"static\" fuel pressure requirements:\u003cbr\u003e• FPD-R base pressure requirement = 40 - 70psi (static)\u003cbr\u003e• FPD-XR base pressure requirement = 40 - 120psi (static)\u003cbr\u003eBase pressure is the fuel pressure measured when the fuel pump is running WITHOUT a vacuum line connected to the regulator.\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000;\"\u003eImportant Notes:\u003c\/span\u003e\u003cbr\u003eThe ranges above are 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.\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000;\"\u003eExample 1: \u003c\/span\u003e\u003cbr\u003eVehicle: Mitsubishi Evo\u003cbr\u003eOEM Base Static Fuel Pressure: 43.5psi\u003cbr\u003eBoost Pressure: 30psi\u003cbr\u003eRising Rate Pressure Regulator? Yes\u003cbr\u003eCan 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. \u003cbr\u003eCan 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 120psi. \u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000;\"\u003eExample 2:\u003c\/span\u003e\u003cbr\u003eVehicle: BMW E46 M3\u003cbr\u003eOEM Base Static Fuel Pressure: 72.5psi\u003cbr\u003eBoost Pressure: 20psi\u003cbr\u003eRising Rate Pressure Regulator? Yes\u003cbr\u003eCan I use a FPD-R? No. Base static fuel pressure exceeds the 40-70psi requirement.\u003cbr\u003eCan 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 120psi.\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000;\"\u003eFeatures:\u003c\/span\u003e\u003cbr\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.\u003cbr\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\u003cbr\u003eThis product is safe for use with all fuel types including alcohol blends such as E85.\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: #ff0000;\"\u003eIncludes:\u003c\/span\u003e\u003cbr\u003e• Anodized and laser engraved aluminum top (FPD-R or FPD-XR)\u003cbr\u003e• Anodized aluminum body with male threads (3\/8\" NPT)\u003cbr\u003e• Stainless steel hardware\u003cbr\u003e• Rubber vacuum hose, 4mm ID\u003cbr\u003e• Vacuum hose Y-fitting\u003ca href=\"https:\/\/stmtuned.com\/collections\/radium-products\" style=\"color: #afafaf;\"\u003e\u003cbr\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: .8em;\"\u003e See more Radium Products\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/a\u003e","brand":"Radium","offers":[{"title":"(20-0776) FPD-R (-8AN Green)","offer_id":50563139797334,"sku":"RAD-20-0776","price":97.86,"currency_code":"EUR","in_stock":true},{"title":"(20-0777) FPD-XR (-8AN Black)","offer_id":50563139830102,"sku":"RAD-20-0777","price":108.0,"currency_code":"EUR","in_stock":true},{"title":"(20-0178) FPD-R (3\/8 NPT Green)","offer_id":50563139862870,"sku":"RAD-20-0178","price":112.85,"currency_code":"EUR","in_stock":true},{"title":"(20-0179) FPD-XR (3\/8 NPT Black)","offer_id":50563139895638,"sku":"RAD-20-0179","price":108.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0817\/9531\/8102\/files\/radium-fuel-pulse-damper-direct-mount-fpdr-green.jpg?v=1749209622","url":"https:\/\/www.speed-addicts.com\/en\/products\/radium-fuel-pulse-damper-direct-mount-kit","provider":"Speed Addicts","version":"1.0","type":"link"}