Clevite MS-829P-10 P-Series High Performance Main Bearing Set

The Clevite MS-829P-10 is a high-performance P-Series main bearing set designed for competition and performance engines requiring maximum oil flow and exceptional retention. These bearings feature full 360-degree grooving to maximize oil delivery to connecting rod bearings, making them ideal for applications where rod bearing oil starvation is a concern.

P-Series Performance Features:

• Full grooved design maximizes oil flow to connecting rod bearings
• High crush construction for maximum bearing retention
• Reduced overlay thickness prevents overlay fatigue and hen tracking
• Higher eccentricity narrows bearing contact patterns for improved performance
• Hardened steel back construction for added strength and fretting resistance
• Clevite TriMetal bearing construction for superior strength and durability

When to Use P-Series Bearings:

P-Series main bearings are recommended when higher eccentricity is desired to narrow bearing contact patterns and provide increased oiling to rod bearings. They are particularly effective in engines experiencing rod bearing oil starvation, typically indicated by polishing, smearing, or discoloration concentrated at the axial center of the bearings. These bearings work best with engines running extremely high RPMs that cause severe rod bore close-in.

Technical Design:

Clevite engineering research has proven that bearing grooving significantly affects oil film development. While bearings depend on an oil film to separate them from the shaft surface, grooving breaks up this film similar to tire tread on wet pavement. The full grooving in P-Series main bearings prioritizes maximum oil supply to connecting rods over oil film thickness in the mains themselves, making them the optimal choice for applications where rod bearing lubrication is critical.

These bearings feature reduced overlay thickness compared to standard bearings to prevent overlay fatigue under severe operating conditions. The high crush design ensures maximum retention in the bearing bore, while the hardened steel backing provides exceptional strength and resistance to fretting corrosion.