Clevite MS-1740P High Performance Main Bearing Set

The Clevite MS-1740P is a precision-engineered main bearing set designed for high-performance and racing applications. This bearing set features advanced metallurgy and design optimizations that maximize oil film strength while providing reliable lubrication to connecting rod bearings.

Engineering and Design:

Main bearings rely on a pressurized oil film to maintain separation from the crankshaft surface. The MS-1740P utilizes an optimized 180-degree groove in the upper shell—a design proven to deliver the best balance of oil distribution and film strength. The lower shells are ungrooved to maximize the oil film thickness where loads are highest, resulting in improved bearing life and greater safety margins under demanding conditions.

P-Series Performance Features:

• High eccentricity design for optimized load distribution
• Full groove configuration for maximum oil flow to rod bearings
• High crush for superior retention in performance blocks
• Reduced overlay thickness to prevent fatigue and hen tracking
• Hardened steel backing for added strength and fretting resistance
• TriMetal construction for exceptional durability

Application Guidelines:

P-Series main bearings are ideal for engines experiencing rod bearing oil starvation, indicated by polishing, smearing, or discoloration concentrated at the bearing's axial center. The higher eccentricity design narrows contact patterns while increasing oil delivery to connecting rod bearings. These bearings are particularly well-suited for extreme RPM applications where severe rod bore distortion occurs.

Technical Specifications:

• Tri-metal bearing construction
• Lead-tin-copper overlay material
• Standard chamfer design
• 180-degree upper shell oil groove
• Ungrooved lower shells for maximum film strength

Clevite bearings are manufactured to exacting tolerances and represent decades of bearing technology development. The MS-1740P delivers the reliability and performance required for competition engines and demanding high-performance applications.