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MagnaFuel MP-9633 MagnaFuel Carbureted Racing Fuel Pressure Control Units

MagnaFuel MP-9633 MagnaFuel Carbureted Racing Fuel Pressure Control Units

$131.50
$131.50
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The MagnaFuel MP-9633 Carbureted Racing Fuel Pressure Control Unit is a bypass-style fuel pressure regulator engineered for competition carbureted engines running on gasoline, E85, or methanol. Designed for oval track, drag racing, road racing, and marine racing applications, this regulator delivers precise fuel pressure control from idle to wide-open throttle under extreme vibration and G-load conditions. It is the standard for professional race teams requiring consistent fuel delivery in win-or-lose environments.

The MP-9633 features a billet 6061-T6 aluminum body with hard-anodized finish, a large 2-inch diaphragm for stable pressure regulation, and a threaded stainless steel adjuster with jam nut for tamper-proof set-it-and-forget-it tuning. Adjustment range is 4–15 PSI, suitable for all racing carburetors. The unit includes -8 AN inlet and outlet ports and a dedicated -6 AN bypass return port to return excess fuel to the tank. Flow capacity exceeds 600 liters per hour with virtually zero pressure droop under full load.

The large-diameter diaphragm design provides superior vibration damping compared to piston-style regulators, delivering rock-steady fuel pressure even on rough oval tracks and bumpy road courses. The bypass-style operation sends hot, aerated fuel back to the tank rather than dead-heading at the carburetor, reducing underhood fuel temperatures and preventing vapor lock in extreme heat conditions. The ability to fine-tune pressure in 0.25 PSI increments gives the tuner precise control over carburetor calibration.

Dominate race day with the MagnaFuel MP-9633 Racing Fuel Pressure Control Unit — precision regulation for the most demanding carbureted applications. Free shipping applies on qualifying orders of $425 or more.
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Frequently Asked Questions

Will the MagnaFuel fuel system component work with my existing fuel pump and injectors?

The MagnaFuel fuel system component is designed to integrate with most aftermarket and OEM fuel systems. It connects using standard AN fittings or factory-style connections depending on the specific model. The MagnaFuel part is compatible with both carbureted and fuel-injected setups when properly matched. Check the inlet and outlet sizes to ensure compatibility with your existing fuel lines and pump output.

How does the MagnaFuel fuel pressure regulator maintain consistent pressure under load?

The MagnaFuel fuel pressure regulator uses a spring-loaded diaphragm to maintain a steady fuel pressure across the flow range. It responds instantly to changes in manifold pressure in vacuum-referenced setups. The MagnaFuel regulator eliminates pressure spikes and drops that cause lean or rich conditions under load. Adjustable models let you fine-tune base pressure from 3 to 15 PSI for carbureted systems or 30 to 70 PSI for EFI systems.

What size fuel lines does the MagnaFuel fuel distribution block accept for my build?

The MagnaFuel fuel distribution block accepts -6AN, -8AN, or -10AN fittings depending on the specific model. It distributes fuel from a single supply line to multiple carburetors or fuel rails evenly. The MagnaFuel block is machined from billet aluminum for strength and corrosion resistance. Select a block with port sizes that match your fuel line diameter for optimal flow without restriction.

Can I mount the MagnaFuel fuel system part in the engine bay or near the tank?

The MagnaFuel fuel system part can be mounted in the engine bay, along the frame rail, or near the fuel tank depending on its function. Regulators and distribution blocks are typically mounted in the engine bay for accessibility. The MagnaFuel component should be mounted securely away from exhaust heat sources and moving suspension parts. Use rubber isolation mounts if vibration could affect the MagnaFuel part operation.

Do I need to use thread sealant on the fittings when installing the MagnaFuel fuel system part?

AN fittings used with the MagnaFuel fuel system component do not require thread sealant since they seal on the 37-degree flare surface. NPT-threaded ports on some MagnaFuel parts require a small amount of PTFE paste or tape rated for fuel use. Overtightening AN fittings can damage the sealing surface and cause leaks. Always use a backup wrench when tightening fittings into the MagnaFuel part to prevent internal damage.