Aeromotive EFI Fuel Pressure Regulator Adjustable 40–75 PSI — Boost‑Referenced, High‑Flow Compact Design

Aeromotive's 13129 adjustable EFI fuel pressure regulator precisely controls 40–75 PSI in return-style fuel systems for reliable, tunable fuel delivery.

This compact, boost-referenced regulator is built for high-performance EFI applications where consistent fuel pressure and clean hose routing matter. Machined and tested using aerospace-inspired processes, it supports high-flow pumps for engines up to 1000 HP, includes an onboard gauge port for accurate setup, and fits tight engine bays with ORB-06 ports.

How does this regulator keep fuel pressure stable under boost?

The regulator uses a boost-referenced vacuum fitting so fuel pressure rises in a 1:1 ratio with boost, preserving the engine's intended fuel curve during forced-induction operation. That relationship helps maintain relative fuel pressure across changing intake manifold conditions.

• 1:1 boost reference via vacuum port for predictable pressure scaling
• Adjustable setpoint covering 40–75 PSI to match injector and pump needs
• Durable construction resists pressure-related drift at high boost levels

Can it handle high-flow pumps and big engines?

Yes. The unit is designed for high-flow EFI systems and supports fuel pumps suitable for applications up to 1000 horsepower when properly plumbed. Internal flow passages and ORB-06 port sizing help minimize restrictions.

• Rated for high-flow pumps used in large-displacement or boosted engines
• ORB-06 inlet and return ports allow efficient hose routing and high flow capacity
• Compact design reduces plumbing complexity in crowded engine bays

How do I monitor and tune fuel pressure with this regulator?

A dedicated 1/8" NPT port accepts a fuel pressure gauge, making setup and fine-tuning straightforward. Use the gauge port to verify the setpoint and confirm boost-referenced behavior under road or dyno conditions.

• 1/8" NPT gauge port for direct pressure readings during calibration
• External adjustment for quick pressure changes without disassembly
• Clear, repeatable adjustments help match pressure to injectors and ECU strategy

Who is this for? The Aeromotive 13129 is aimed at performance builders, tuners, and racers running return-style EFI systems who need a compact, accurately adjustable regulator that handles high flow and behaves predictably under boost. It's ideal for forced-induction engines, street/strip race cars, and any application where precise fuel pressure control and simple plumbing are priorities.