www.foreinnovations.com Toggle Search Account Checkout Cart CHRYSLER Challenger, Charger, Magnum, 300C Cherokee SRT-8 WK1 (2006-2010) Cherokee SRT-8 WK2 (2011+) Cherokee Trackhawk (2018+) Durango SRT Hellcat (2021 Only) Durango SRT/RT (2011+) Ram TRX Viper (2013+) FORD F-150 GT350/R (2015-2020) GT500 Mustang GT SVT Cobra & Mach1 (1999-2004) SVT Lightning (1999-2004) GM ATS-V (2016-2019) Camaro (2016+) Camaro (2010-2015) Caprice PPV (2009-2017) Commodore Corvette C7 (2014-2019) Corvette C5, C6 (2003-2013) CTS-V (2016-2019) CTS-V (2009-2015) G8 Maloo SS (2014-2017) IMPORTS Gallardo Golf Mk5 GT-R R35 WRX (2008-2014) UNIVERSAL PARTS Fuel Pressure Regulators Fuel Filters Fuel Pumps Fittings, Y-blocks, Adapters, Gauges Hose and Hose Ends Nitrous Fittings & Accessories Boost / Vacuum Accessories Electrical Replacement / Service Items Shirts and Stickers Search site Submit search FAQ BLOG CAREERS TRIPLE UPGRADE PROGRAM WARRANTY DEALERS Nav Menu 5 Nav Menu 6 Nav Menu 7 Nav Menu 8 Home > UNIVERSAL PARTS > Fittings, Y-blocks, Adapters, Gauges > Check Valve and Adapters > FCV Check Valve Product images are provided for demonstration purposes only and may display selectable variations and/or options. ALTERNATE VIEWS Starting Price: $79.00 Availability: Usually Ships in 1-2 Business Days Part Number: 39-100 Inlet (required) AN -6 male AN -8 male AN -10 male ORB -8 male ORB -10 male ORB -8 female ORB -10 female Outlet (required) AN -6 male AN -8 male AN -10 male ORB -8 male ORB -10 male ORB -8 female ORB -10 female Qty: Description Features & Specifications Documentation & FAQs Fore Innovations FCV Axial Poppet Check Valve compatible with all gasoline and alcohol fuels axial poppet design has no hinges, flaps, or mechanical components to wear out streamlined poppet ensures low losses and no flutter on high performance fuel systems configurable outlets for easy implementation Viton o-ring ensures function at low pressures Pictures show FCV used in multiple applications and configurations. One FCV is comprised of one fully assembled checkvalve with customer selected end adapters. FCV can be disassembled and the ends can be replaced with different sizes as needed by the application.Carefully review "Documentation and FAQs" prior to purchasing. Specifications Body Material: CNC machined aluminum, black anodized and laser marked Spring: Stainless Steel Axial Poppet: Delrin with Viton o-ring Dimensions: See drawing Fitment Do not install on returnless fuel systems without pressure relief valve Not required on SN95, Lightning, or WK1 Cherokee, Hellcat sedan platforms with checked pumps Use "-10 o-ring" inlet or outlet to connect directly to the inlet of Fore Innovations fuel filter or y-block. Q: Where should I install the FCV?A: Closer to the fuel pump is ideal to "trap" as much fuel in the feed line as possible; however, it is often more convenient to install directly on the fuel filter or y-block. Our customers report that keeping the FCV withing 3-4 feet [1 meter] from the fuel pump is effective.Q: Should I purchase an FCV?A: It depends on your application. Some fuel pumps already have checkvalves, so FCV is not needed in this case. Generally speaking, dual sump/tank vehicles with return fuel systems are the best candidates for FCV. Do not install FCV in returnless fuel systems.Q: Why does my fuel pressure slowly bleed down, even with FCV installed?A: Check valves prevent reverse flow...they do not generate pressure. Upgraded fuel systems (large fuel pumps, large feed line volume) should be expected to nearly ALWAYS drop fuel pressure when the fuel pump is shut down, even with a check valve installed. Nonetheless, the FCV will prevent the feed line from draining back to the tank, and this will allow fuel pressure to be re-established rapidly when the fuel pump is activated for prime or engine start.Q: I installed an FCV with the expectation that my starting conditions would improve, but the difference was negligible.A: Check your fuel pressure while starting. If you have good pressure while the starter motor is turning the motor, ask your tuner adjust the hot/cold start parameters, as appropriate.