Speed Pro 120M Engine Crankshaft Main Bearing Set

Overview of Speed Pro 120M Main Bearing Set

The Speed Pro 120M Engine Crankshaft Main Bearing Set is engineered for competition series applications, specifically designed for Chrysler small block engines with a 360 displacement. This main set provides reliable support for the crankshaft, ensuring optimal engine performance in high-demand conditions.

• Designed for Chrysler, Dodge, and Plymouth vehicles including Ram 1500, Charger, and Dakota
• Constructed from steel backed overplated bronze alloy for durability
• Standard size main bearing set (Std-10) for precise fitment
• Compatible with small block 360 cubic inch engines
• Intended for competition series engine builds

Technical Details and Material Composition

The Speed Pro 120M main bearing set features a super duty alloy material composition, combining steel backing with an overplated bronze alloy surface. This construction enhances wear resistance and load capacity, critical for high-performance Chrysler small block engines. The set is manufactured to standard size specifications (Std-10), ensuring proper clearance and fitment in engines such as the Dodge Ram 1500, Plymouth Barracuda, and Chrysler Charger.

Compatible Vehicles and Applications

This main bearing set is compatible with a wide range of Chrysler, Dodge, and Plymouth models, including but not limited to the Dodge Dakota, Ram 2500, Plymouth B200, and Chrysler LeBaron. It is specifically designed for small block engines with a 360 cubic inch displacement, commonly found in competition and performance builds.

Common Issues Addressed by the 120M Main Bearing Set

• Excessive crankshaft wear due to inadequate bearing material
• Engine knocking caused by worn or undersized main bearings
• Oil clearance problems leading to reduced engine efficiency
• Failure of standard bearings under high-stress competition conditions
• Vibration and noise from improper bearing fitment

Installation Notes and Tips

Ensure the crankshaft journals are clean and free of debris before installation. Verify the bearing size matches the crankshaft journal diameter (standard size Std-10). Use proper torque specifications when tightening main caps to avoid distortion. It is recommended to check oil clearances with plastigauge during installation to confirm proper fitment. This set is intended for professional installation in competition series engines.

Quality Assurance and Warranty

Speed Pro manufactures the 120M main bearing set to meet stringent quality standards for competition use. The steel backed overplated bronze alloy construction provides enhanced durability and wear resistance. While specific warranty details are not provided, Speed Pro products are generally backed by manufacturing quality controls to ensure reliability in demanding applications.