Melling Performance 10688 - High Volume Performance Oil Pump & Intermediate Shaft Ford Small Block

Description

Made in the USA to the highest production standards, Melling performance oil pumps deliver dependable lubrication and maximum durability under the toughest RPM conditions. Engineered as a high-volume, high-pressure competition upgrade over the standard M-68-HV, this oil pump is purpose-built to eliminate common high-RPM valvetrain and oiling weaknesses in performance Small Block Ford builds. It features an extended drive shaft integrated into the gerotor assembly that extends through the cover for dual-ended support, effectively eliminating dynamic shaft deflection and binding at high engine speeds. To ensure perfect shaft bore alignment, the heavy-duty cover is positively doweled directly to the pump housing. The pressure relief circuit incorporates a serviceable screw-in plug in place of a factory cup plug, arriving pre-assembled with a +25 PSI relief spring alongside an optional +20 PSI spring for custom pressure tailoring. Sized for use with a heavy-duty chromoly intermediate driveshaft (included, part # 12680), every pump is individually bench-tested for pressure and flow under simulated engine operating conditions prior to packaging.

Features & Technical Highlights:

• Dual-Supported Anti-Deflection Drive Shaft: The gerotor assembly is mounted to an extended drive shaft supported in both the housing and the cover, eliminating dynamic shaft deflection, rotor bind, and galling at elevated RPM levels.
• Doweled Cover Alignment: The cover is positively doweled to the pump body to guarantee perfect concentric alignment of the shaft bores under heavy hydraulic loads.
• High-Volume & High-Pressure Delivery: Engineered as an upgraded performance version of the M-68-HV, providing abundant flow and oil pressure for racing clearances and remote oiling systems.
• Included 12680 Chromoly Intermediate Shaft: Bundled with Melling's heavy-duty 12680 chrome moly oil pump drive shaft to prevent twist or shear failure under high-volume drag.
• Adjustable Pressure Relief System: Features a threaded screw-in relief valve plug and arrives pre-installed with a +25 PSI relief spring, plus an interchangeable +20 PSI spring to customize system pressure.
• Close-Tolerance Gerotor Technology: Rotors are precision-machined to close tolerances for smooth, pulse-free fluid movement and efficient pressure buildup.
• Precision-Ground Wear Surfaces: End plates are ground to tight tolerances to provide maximum wear resistance against cavitation and scoring.
• 100% Bench Tested: Individually dynamometer-tested by Melling for real-world flow and pressure performance before packaging.