{"product_id":"evil-energy-adjustable-efi-fuel-pressure-regulator-30-140-psi-red-anodized-an10-return-with-gauge-and-fittings","title":"EVIL ENERGY Adjustable EFI Fuel Pressure Regulator 30–140 PSI – Red Anodized, AN10 Return with Gauge and Fittings","description":"\u003cp\u003e\u003cstrong\u003eEVIL ENERGY’s adjustable EFI fuel pressure regulator is a billet 6061-T6 aluminum unit that lets you set and maintain fuel pressure between 30–140 PSI for gasoline, E85 and ethanol applications (not for diesel).\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact, red-anodized regulator is built for engine tuning and reliable EFI performance. It arrives with a pressure gauge, a preinstalled spring for 30–80 PSI, a replacement spring for 80–140 PSI, multiple AN fittings and a return bypass, so you can tailor fuel pressure for street, race, or modified engines. The unit includes a vacuum\/NPT port for fine control and an ORB-style AN10 return port for high-flow setups.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I change and set the fuel pressure on this regulator?\u003c\/h3\u003e\n\u003cp\u003eAdjusting pressure is done by turning the top set screw; the preinstalled spring covers 30–80 PSI and swapping in the included spring raises the range to 80–140 PSI. Always install the pressure gauge into the NPT port with thread sealant, and make small adjustments while monitoring fuel rail pressure under running conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse the supplied allen key to turn the set screw for coarse adjustments.\u003c\/li\u003e\n  \u003cli\u003eFit the pressure gauge into the 1\/8\" NPT instrument port and seal with tape provided.\u003c\/li\u003e\n  \u003cli\u003eSwap springs to switch between the low and high pressure ranges.\u003c\/li\u003e\n  \u003cli\u003eVerify pressure on a warm engine under expected load before final tuning.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat fittings and ports are included for plumbing the return-style regulator?\u003c\/h3\u003e\n\u003cp\u003eThe regulator features two 10AN (ORB) feed ports and one 10AN ORB return port, plus assorted AN adapters in three sizes supplied in the package. That assortment lets you adapt the regulator to prevailing line sizes or hose ends used in your vehicle’s fuel system.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThree AN10-to-AN6 adapters for smaller feed lines.\u003c\/li\u003e\n  \u003cli\u003eThree AN10-to-AN8 adapters to match common EFI plumbing.\u003c\/li\u003e\n  \u003cli\u003eThree AN10-to-AN10 adapters for direct ORB-to-AN connections.\u003c\/li\u003e\n  \u003cli\u003eOne AN10 ORB port plug included for temporary sealing or testing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this regulator compatible with my fuel and EFI system?\u003c\/h3\u003e\n\u003cp\u003eIt’s compatible with gasoline, E85 and other alcohol-based fuels but not designed for diesel. The regulator is intended for electronic fuel injection systems that use a return-style setup; nylon braided lines are not recommended with E85.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWorks with most return-style EFI systems and aftermarket fuel rails.\u003c\/li\u003e\n  \u003cli\u003eNot suitable for diesel or systems requiring specialized materials.\u003c\/li\u003e\n  \u003cli\u003eAvoid nylon braided hoses when running alcohol fuels like E85.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safe, leak-free operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat installation and maintenance steps should I follow?\u003c\/h3\u003e\n\u003cp\u003eMount the regulator securely and use thread sealant tape on the gauge NPT port as supplied. Periodically inspect fittings for leaks and ensure the vacuum line (if used) is connected cleanly; replace seals or O-rings if you notice seepage.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eApply the included sealant tape to the pressure gauge threads before installation.\u003c\/li\u003e\n  \u003cli\u003eTorque AN fittings to manufacturer specs to avoid thread damage or leaks.\u003c\/li\u003e\n  \u003cli\u003eCheck the replacement spring and gauge function during initial break-in runs.\u003c\/li\u003e\n  \u003cli\u003eHave a trained technician perform installation when in doubt.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: EVIL ENERGY’s regulator is aimed at tuners, track drivers and performance-minded streetcar owners who need precise fuel pressure control for modified engines or when switching between fuel types like gasoline and E85. It’s also useful for engine builders and shops that install aftermarket EFI components and require a robust, tunable regulator with multiple plumbing options. If you want a durable, billet aluminum regulator with a broad adjustable range and included gauge and fittings, this unit is a practical choice.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this regulator with E85 fuel?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — compatible with E85 and ethanol fuels, but avoid nylon braided lines with E85 and ensure correct fittings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What pressure ranges does the unit support?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Preinstalled spring: 30–80 PSI; included replacement spring raises range to 80–140 PSI.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"EVIL ENERGY","offers":[{"title":"Default Title","offer_id":48081398497438,"sku":"B0DM8VXRS5","price":109.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/evil-energy-front-view-regulator.jpg?v=1785802904","url":"https:\/\/northtrailauto.ca\/products\/evil-energy-adjustable-efi-fuel-pressure-regulator-30-140-psi-red-anodized-an10-return-with-gauge-and-fittings","provider":"North Trail Auto","version":"1.0","type":"link"}