HOLLEY Dominator Billet Carbureted Fuel Pressure HOL-12-847 Regulator

( Brand: Holley ), ( Part Type: Fuel Pressure Regulator ), ( Manufacturer Part Number: 12-847 )

Review HOLLEY Dominator Billet Carbureted By Pass Fuel Pressure Regulator

The Holley 12-847 Hol-12-847 Dominator Billet Fuel Pressure Regulator is a high-performance fuel pressure regulator designed for serious racers and hot rodders seeking precise fuel pressure control for their high-performance engines. This regulator is part of Holley's Dominator series, which is renowned for its durability, consistency, and ease of use.

The Holley 12-847 is a billet aluminum regulator, which means it is machined from a solid block of aluminum. This construction method results in a strong, lightweight regulator that can withstand the demands of high-performance applications. The regulator features a 3/8 NPT inlet and outlet, making it compatible with most fuel systems.

One of the standout features of this regulator is its adjustable fuel pressure range. The Holley 12-847 can be adjusted to deliver fuel pressure between 2 and 100 psi, allowing users to fine-tune their engine's fuel delivery for optimal performance. The regulator also features a bleed screw, making it easy to purge air from the fuel system during installation or maintenance.

Another noteworthy feature is the regulator's adjustable relief valve. This valve allows users to set the fuel pressure relief point, ensuring that the engine never receives too much fuel pressure, which can lead to engine damage. The regulator also includes a built-in fuel pressure gauge, allowing users to easily monitor fuel pressure at a glance.

The Holley 12-847 Dominator Billet Fuel Pressure Regulator is designed to be easy to install and use. It comes with all necessary hardware, including a mounting bracket, and can be installed using common hand tools. The regulator's adjustment screws are accessible from the top, making it easy to make adjustments without removing the regulator from the engine compartment.

In summary, the Holley 12-847 Hol-12-847 Dominator Billet Fuel Pressure Regulator is a high-performance, adjustable fuel pressure regulator designed for serious racers and hot rodders. Its billet aluminum construction, adjustable fuel pressure range, and adjustable relief valve make it a versatile and reliable solution for precise fuel delivery control. The regulator's easy-to-install design and built-in fuel pressure gauge make it a convenient addition to any high-performance engine setup.

The Holley 12-847 (Hol-12-847) Dominator Billet Fuel Pressure Regulator is a popular aftermarket fuel pressure regulator designed for high-performance applications. Here are some potential pros and cons of buying this regulator, along with an Recommendation.

1. Billet aluminum construction: The billet aluminum design ensures a strong and durable construction, which is essential for high-performance applications where fuel pressure fluctuations can be significant.

2. High fuel pressure capabilities: This regulator can handle fuel pressures up to 100 psi, making it suitable for use with high-performance engines that require more fuel pressure than stock regulators can provide.

3. Adjustable fuel pressure: The regulator allows for adjustable fuel pressure, enabling users to fine-tune their engine's fuel delivery for optimal performance.

4. Easy installation: The regulator comes with simple installation instructions and requires minimal modification to most fuel systems, making it a convenient option for DIY enthusiasts.

5. Wide compatibility: The Holley 12-847 is compatible with various fuel systems, including EFI, carbureted, and nitrous applications, making it a versatile choice for different types of vehicles.

1. Higher cost: Compared to stock fuel pressure regulators, the Holley 12-847 is more expensive, which may be a disadvantage for those on a tight budget.

2. Requires fuel pressure gauge: To accurately set and monitor the fuel pressure, a fuel pressure gauge is required, which adds to the overall cost and complexity of the installation.

3. Potential for leaks: As with any fuel system component, there is a risk of leaks when installing or using this regulator. Proper installation and maintenance are essential to minimize this risk.

4. May not be suitable for some applications: While the Holley 12-847 is a versatile option, it may not be the best choice for certain applications, such as those with unique fuel system requirements or extremely high fuel pressures.

The Holley 12-847 Dominator Billet Fuel Pressure Regulator is a high-quality, durable, and versatile option for those seeking to improve their vehicle's fuel system performance. Its adjustable fuel pressure capabilities, compatibility with various fuel systems, and strong construction make it a popular choice among high-performance enthusiasts. However, its higher cost and the need for a fuel pressure gauge may deter some potential buyers. Ultimately, the decision to purchase this regulator depends on your specific application requirements, budget, and performance goals.

If you're looking to upgrade your fuel system for high-performance applications and are willing to invest in a durable, adjustable, and versatile regulator, the Holley 12-847 Dominator Billet Fuel Pressure Regulator is an excellent choice. However, if you're on a tight budget or have unique fuel system requirements, you may want to consider other options or consult with a fuel system expert before making your purchase.

part # 12847 prices

• $269.95-$299.95

specifications carbcaddie:

• brand: Holley
• part type: Fuel Pressure Regulator
• manufacturer part number: 12-847

payments carbcaddie:

• wallet: Apple-pay
• credit card: Visa

offer carbcaddie:

• started: May 23, 2025
• sold: 0
• availability: In Stock

returns carbcaddie:

• time: 30 Days
• paid by: Buyer
• policy: Returns Accepted

shipping carbcaddie:

general carbcaddie:

• Car Parts Accessories > Air Fuel Delivery > Carburettor Parts
• condition: New

seller carbcaddie:

• # reviews: 10743
• rating: 99.4%

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