FX-S (1/8 NPT Ports) 800HP

🔧 Product Description

The FX-S Fuel Pressure Regulator (1/8” NPT Ports) – 800HP is a high-flow, motorsport-grade fuel pressure regulator designed for high-performance turbo and EFI applications running petrol, E85, methanol, or diesel.

Engineered for stability under extreme load, the FX-S delivers precise 1:1 fuel pressure rise, exceptional flow capacity, and superior fuel pressure control for high horsepower engines.

Built with a fully serviceable design and heavy-duty internal construction, this regulator is suitable for street, race, and forced-induction setups requiring consistent fuel delivery under boost.

⚙️ Key Features

• 4x 1/8” NPT body ports (flexible inlet / sensor / gauge configuration)
• 1x 1/8” NPT dedicated return port
• Supports up to 800HP applications
• Flow capacity up to 750 LPH @ 25psi
• 1:1 fuel pressure rise with boost
• Adjustable static fuel pressure (25psi – 80psi)
• Double-layer reinforced diaphragms
• Burst strength exceeding 500psi
• Teflon co-polymer valve seat for superior sealing
• Stainless steel spherical valve for consistent flow control
• O-ring sealed preload adjustment (no vacuum/boost leaks)
• Fully serviceable design for long-term durability

🏁 Performance Benefits

⛽ Stable Fuel Delivery Under Boost
Maintains consistent fuel pressure even under high boost and high horsepower demand.

🚀 Improved Engine Safety at High Power Levels
Prevents fuel starvation and pressure drop during wide-open throttle conditions.

🔒 Excellent Pressure Retention on Shutdown
Teflon seat and stainless valve design help maintain residual fuel pressure after engine off.

⚙️ Precise Tuning Capability
Adjustable base pressure allows fine-tuning for turbocharged, supercharged, or NA performance setups.

🔬 Engineering Highlights

The FX-S regulator is built around a dual-reinforced diaphragm system, engineered to handle extreme fuel pressure spikes while maintaining long-term reliability.

The spherical stainless valve ensures smooth, repeatable fuel control, while the co-polymer Teflon seat improves sealing efficiency and reduces pressure bleed-down.

The preload adjustment system is fully sealed with an O-ring design, eliminating vacuum or boost leaks commonly found in lower-grade regulators.

🧪 Fuel Compatibility

• Petrol / Gasoline
• E85 / Ethanol blends
• Methanol
• Diesel

🛠️ Installation Notes

• Universal EFI fuel system fitment
• Requires appropriate fuel system plumbing (1/8” NPT ports)
• Suitable for return-style fuel systems
• Recommended for high-flow fuel pump setups
• Professional installation advised for performance applications

💡 Why Choose the FX-S 800HP Regulator?

If you need:

• Stable fuel pressure under high boost
• High horsepower fuel system support (up to 800HP)
• Multi-port flexibility for sensors and gauges
• Reliable operation on ethanol or race fuels
• A fully serviceable, motorsport-grade regulator

👉 The FX-S delivers consistent, tunable fuel control for serious performance builds.

🏆 Perfect For

• Turbocharged performance engines
• E85 and flex-fuel conversions
• Drag, circuit, and drift builds
• High-boost street performance cars
• Custom EFI fuel system setups