Clevite MS-2252P-10 P-Series High Performance Main Bearing Set

The Clevite MS-2252P-10 is a high-performance main bearing set from the legendary P-Series line, engineered specifically for competition engines operating at extremely high RPM. These bearings feature increased eccentricity to narrow bearing contact patterns and maximize oil flow to connecting rod bearings, making them ideal for racing applications where rod bearing lubrication is critical.

Key Features:

• P-Series design with maximum eccentricity for optimal oil delivery to rod bearings
• High crush design ensures maximum bearing retention under extreme loads
• Reduced overlay thickness prevents overlay fatigue and hen tracking
• Hardened steel back construction provides superior strength and fretting resistance
• Full groove design maximizes oil flow to connecting rod bearings
• TriMetal construction with proven Clevite durability

When to Use P-Series Bearings:

P-Series main bearings are the optimal choice when extremely high RPM operation causes severe rod bore close-in, typically indicated by nearly full parting line contact. They excel in applications where rod bearing oil starvation is a concern, which manifests as polishing, smearing, or discoloration concentrated at the bearing's axial center. The higher eccentricity design deliberately narrows bearing contact patterns while ensuring adequate lubrication reaches the connecting rod bearings.

Understanding Main Bearing Groove Design:

Main bearing grooves serve primarily to supply oil to connecting rod bearings. Modern bearing technology has proven that upper main shells with 180-degree grooves provide the best overall performance, developing a thick oil film for the crankshaft to ride on while maintaining proper rod lubrication. The P-Series full groove design prioritizes maximum oil delivery for demanding racing applications where rod bearing lubrication is paramount.

Clevite engine bearings are trusted by professional engine builders and racers worldwide for their consistent quality, precise tolerances, and proven durability under the most demanding conditions.