{"product_id":"radium-fpd-r-fuel-pulse-dampener-3-8-npt","title":"Radium FPD-R Fuel Pulse Dampener - 3\/8\" NPT","description":"\u003ch2\u003eRadium FPD-R Fuel Pulse Damper — 3\/8\" NPT\u003c\/h2\u003e\n\n\u003cp\u003eThe opening and closing of fuel injectors creates pressure pulses in the fuel rail that can lead to unstable fuel pressure. A fuel pulse damper (FPD) absorbs these oscillating pulses via an internal diaphragm to stabilise rail pressure throughout the RPM range. This can help resolve idle surge (especially with high-flow injectors) and erratic lean AFR spikes commonly experienced as “stumbling” that are difficult to tune out.\u003c\/p\u003e\n\n\u003cp\u003eRadium FPDs feature a vacuum\/boost reference port, allowing proper damper performance even at elevated fuel pressures — essential for boosted systems running a 1:1 rising-rate fuel pressure regulator. The anodized aluminium housing offers two selectable threaded male fittings: 8AN ORB (Viton O-ring seal) or 3\/8\" NPT (tapered thread seal). The FPD can be mounted at any angle, including upside down. For best results, mount directly onto the fuel rail.\u003c\/p\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eFPD-R vs FPD-XR — Which Do I Choose?\u003c\/h3\u003e\n\n\u003cp\u003eBoth models have unique base “static” fuel pressure requirements. Base pressure is measured with the fuel pump running and \u003cstrong\u003eno vacuum line connected\u003c\/strong\u003e to the regulator.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFPD-R\u003c\/strong\u003e (green top, shorter) — Base static pressure: \u003cstrong\u003e40-70 PSI\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFPD-XR\u003c\/strong\u003e (black top, taller) — Base static pressure: \u003cstrong\u003e40-105 PSI\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e The ranges above are base static fuel pressures only. Dynamic fuel pressure created by a rising-rate FPR outside of this range is acceptable, provided the base static pressure is set within the specified range and the vacuum\/boost reference line is connected.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eExample 1 — Mitsubishi EVO:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOEM base static fuel pressure: 43.5 PSI\u003c\/li\u003e\n  \u003cli\u003eBoost pressure: 30 PSI\u003c\/li\u003e\n  \u003cli\u003eRising-rate FPR: Yes\u003c\/li\u003e\n  \u003cli\u003eFPD-R compatible? \u003cstrong\u003eYes\u003c\/strong\u003e — base static is within 40-70 PSI. Fuel pressure reaches 73.5 PSI at full boost, but the vacuum\/boost reference line must be connected.\u003c\/li\u003e\n  \u003cli\u003eFPD-XR compatible? \u003cstrong\u003eYes\u003c\/strong\u003e — vacuum\/boost reference line not required as max pressure does not exceed 105 PSI.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eExample 2 — BMW E46 M3:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOEM base static fuel pressure: 72.5 PSI\u003c\/li\u003e\n  \u003cli\u003eBoost pressure: 20 PSI\u003c\/li\u003e\n  \u003cli\u003eRising-rate FPR: Yes\u003c\/li\u003e\n  \u003cli\u003eFPD-R compatible? \u003cstrong\u003eNo\u003c\/strong\u003e — base static pressure exceeds the 40-70 PSI requirement.\u003c\/li\u003e\n  \u003cli\u003eFPD-XR compatible? \u003cstrong\u003eYes\u003c\/strong\u003e — vacuum\/boost reference line not required as max pressure does not exceed 105 PSI.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eKit Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1x Anodized and laser-engraved aluminium top (R = Range)\u003c\/li\u003e\n  \u003cli\u003e1x Anodized aluminium body with male threads — 3\/8\" NPT\u003c\/li\u003e\n  \u003cli\u003eStainless steel hardware\u003c\/li\u003e\n  \u003cli\u003e4mm ID rubber vacuum hose\u003c\/li\u003e\n  \u003cli\u003eVacuum hose Y-fitting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eModel: FPD-R (green top, shorter profile)\u003c\/li\u003e\n  \u003cli\u003eThread: 3\/8\" NPT male\u003c\/li\u003e\n  \u003cli\u003eBase static pressure range: 40-70 PSI\u003c\/li\u003e\n  \u003cli\u003eVacuum\/boost reference port: Yes\u003c\/li\u003e\n  \u003cli\u003eMounting: Any angle, including inverted\u003c\/li\u003e\n  \u003cli\u003eFuel compatibility: All fuel types including E85 and alcohol blends\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eAvailable Part Numbers:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e20-0178 — FPD-R Fuel Pulse Damper, 3\/8\" NPT\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eWhy Radium Engineering?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ Manufactured in the USA to motorsport-grade tolerances\u003c\/li\u003e\n  \u003cli\u003e✅ CNC-machined anodized aluminium with vacuum\/boost reference port for boosted rising-rate FPR applications\u003c\/li\u003e\n  \u003cli\u003e✅ Trusted by tuners and race teams running high-power builds worldwide\u003c\/li\u003e\n  \u003cli\u003e✅ Mounts at any angle including inverted — direct fuel rail mounting for best performance\u003c\/li\u003e\n  \u003cli\u003e✅ Compatible with E85, ethanol, methanol, pump petrol, and flex fuel sensor integration\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Radium Engineering","offers":[{"title":"Default Title","offer_id":48591120597224,"sku":"20-0178","price":147.56,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0354\/8135\/4376\/files\/20-0178_30db6681-6431-448e-8ec6-8f20390e8d93.jpg?v=1779943928","url":"https:\/\/www.platinumracingproducts.com\/zh-sg\/products\/radium-fpd-r-fuel-pulse-dampener-3-8-npt","provider":"Platinum Racing Products","version":"1.0","type":"link"}