Fuel Log

The MOROSO Fuel Log adjustable fuel pressure regulator (MPN 65145) is purpose-built for hot rodders, tuners, and performance mechanics who demand precise fuel delivery control across carbureted and fuel-injected engine builds. This compact aluminum regulator gives you the ability to fine-tune fuel pressure between 6 and 10 psi—a critical adjustment window for maximizing carburetor atomization, EFI tuning, and overall engine response. Whether you're dialing in a street engine or optimizing a weekend warrior platform, the Fuel Log delivers the accuracy and reliability that separates competent fuel system work from guesswork.

Built from black anodized aluminum, the Fuel Log features a durable finish that resists corrosion and maintains structural integrity in engine bay environments. The regulator accepts a 3/8 inch NPT female inlet connection for primary fuel supply, while four 1/4 inch NPT female outlets provide multiple fuel distribution points—ideal for routing to carburetors, injector rails, or secondary fuel circuits. A dedicated 3/8 inch NPT female return line allows excess fuel to bypass back to the tank, reducing heat buildup and preserving fuel system stability. The adjustable pressure range of 6–10 psi makes it compatible with most street and mild performance applications without requiring additional bypass components or external regulators.

Professional mechanics and DIY enthusiasts benefit most from the Fuel Log when upgrading carbureted vintage builds, transitioning to sequential fuel injection, or troubleshooting inconsistent fuel delivery on existing platforms. Its lightweight design (0.8 lbs) and compact footprint (3.4 x 2.3 x 8.7 inches) make engine bay installation straightforward, whether you're working in tight quarters or routing fuel lines along transmission tunnels. The NPT female port configuration ensures compatibility with standard automotive fuel line adapters and allows integration into existing fuel system architecture without requiring custom fittings or fabrication.