PTNHZ RACING Adjustable Fuel Pressure Regulator for Carburettor — Chrome 1–5 psi Manual Dial

PTNHZ RACING Manual Adjustable Fuel Pressure Regulator lets you dial fuel pressure between 1–5 psi to stabilize carburettor feeding for single or twin setups.

Built for classic and performance applications that use mechanical or electric lift pumps, this compact chrome-finish regulator controls the flow and pressure entering your carburettor. It pairs well with Facet-style fuel pumps and other low-pressure sources, protecting carburettor float bowls from excessive pressure while offering an easy-to-read numbered adjustment dial for on-vehicle tuning.

How much pressure adjustment does this regulator provide?

The regulator offers a manual adjustment range from 1 to 5 psi via a numbered dial on top, letting you fine-tune fuel delivery for different jetting or engine setups. Do not exceed the maximum input pressure of 7 psi to avoid damage.

• Adjustment range: 1–5 psi
• Top-mounted numbered dial for quick visual setting
• Maximum input pressure: 7 psi (do not exceed)
• Suitable for low-pressure carburettor systems

Will this fit single and twin carburettor installations?

Yes — the design accommodates both single and twin carburettor configurations, making it versatile for older street cars, hot rods, and lightweight performance builds. The compact footprint and standard hose fittings simplify installation on manifold or chassis-mounted plumbing runs.

• Compatible with single and twin carburettor setups
• Compact chrome housing for easy mounting
• Works with common low-pressure fuel hoses and clamps
• Ideal when used downstream of Facet-style pumps

How does the regulator improve carburettor performance?

By keeping fuel pressure within a narrow, adjustable window, the regulator prevents over-pressurizing float bowls that can cause rich running or flooding. Consistent pressure helps maintain predictable fuel metering across throttle positions and supports more reliable jet tuning.

• Reduces float bowl overfill and flooding risk
• Stabilizes fuel flow for repeatable jetting adjustments
• Chrome finish resists corrosion and provides a clean look
• Manual control lets you tune for altitude or engine changes

What should I know before installing it?

Confirm your pump’s maximum outlet pressure is below 7 psi to protect the regulator. Use appropriate fuel-rated hoses, clamps, and mounting hardware; avoid excessive heat sources and secure the unit to minimize vibration.

• Check pump output does not exceed 7 psi
• Use fuel-rated hose and secure clamps
• Mount away from exhaust heat and heavy vibration
• Adjust pressure with engine off, then verify under running conditions

Who is this for: The PTNHZ RACING Manual Adjustable Fuel Pressure Regulator is aimed at classic car owners, hot rodders, kart and race builders, and mechanics converting or tuning low-pressure carburettor systems. If you use a Facet or similar low-pressure pump and need a simple, durable way to set and hold fuel pressure between 1–5 psi while maintaining a vintage appearance, this regulator is a practical, budget-friendly choice.