Blox Racing Competition 2-Port Adjustable Fuel Pressure Regulator is made from billet aluminum, and each unit features -6AN inlet and return ports which offer an easier installation experience. It is designed to offer high performance and reliability. The competition series provides more pressure range and allows proper tuning of air-to-fuel ratio to get the maximum efficiency. Has different finishes to suit your liking.
Inlet size: -6AN
Inlet size: -6AN
Max. flow: 2.5 GPM @ 25 PSI
Adj. range: 25-90 PSI
Install Guide:
Installation Steps: Disconnect the ground terminal from the battery and allow the vehicle’s engine and exhaust system to cool. Relieve the vehicle’s fuel system in a well-ventilated area. DO NOT place any open flames or smoke near the vehicle. Have a fire extinguisher nearby.
Modify, remove, or replace any of the vehicle’s fuel system components per specific build needs or requirements.
Use light oil to lubricate the adjustment screw. Thread the adjustment screw by hand until a slight tension is felt. This will be the minimum fuel pressure setting. DO NOT tighten any further. Install the flat washer and then hand-tighten the jam nut. DO NOT torque down the jam nut.
Use Teflon® tape or another type of thread sealant on the 1/8” NPT fittings. One port will be used for the barbed vacuum fitting and the other for a fuel pressure gauge. If a gauge will not be used, use the block-off plug.
Install -6AN fuel fittings. Fuel fittings are not supplied. Use light oil to lubricate the included O-rings and place them onto the fuel fittings for proper sealing. Thread the fittings into the FPR and tighten between 5 and 15 ft·lbs of torque. Note: Do not use Teflon® thread tape or other types of thread sealant on fuel fittings. The FPR fuel ports are not pipe threads or tapered.
The BLOX FPR can be mounted directly to an aftermarket fuel rail or in a location that minimizes exposure to excessive heat. Use the supplied bracket as a template to measure and mark the holes for the mounting bracket. Mount the bracket onto the FPR using the supplied bracket screws and lock washers. Hand-tighten the screws but do not over-tighten.
Install the FPR assembly into position and attach the fuel lines, fuel pressure gauge, and vacuum hose. Boosted applications will require a hose clamp on the barbed fitting to prevent the hose from coming loose. As a substitute, use a -3AN or -4AN fitting and line in place of the barbed fitting. Note: DO NOT mount the fuel pressure gauge anywhere inside the vehicle
Inspect the entire fuel system for any contact of fuel lines or wires with other engine and electrical components that can cause chafing or rubbing. Secure all components and fuel lines.
Connect the vehicle’s battery. Turn on the fuel pump without starting the engine. The fuel pump will have to operate for several seconds (30+) to prime in order to drive any air out of the fuel system. The fuel pressure should read approximately 25 PSIG. Inspect the fuel system for any leaks.
When adjusting the fuel pressure, be sure that the fuel pump is operating properly. In order to increase fuel pressure, rotate the adjustment screw clockwise. Do not tighten the adjustment screw past the jam nut within 1/8”. Over-tightening can cause damage to the FPR internally.
After the final adjustment of the fuel pressure has been made, tighten the jam nut. It is recommended to test drive the vehicle and retest the fuel pressure for accuracy.
