What does '0.020 inch undersize' mean for these bearings?

This means the bearing's inner diameter is slightly smaller than a standard (or 'full size') bearing. It's designed to be used when the crankshaft journals have been machined down by 0.020 inches to ensure the correct oil clearance is achieved.

What is the tri-metal overlay mentioned?

The tri-metal overlay is a layer of materials applied to the bearing surface, typically copper-lead-tin alloys. This construction offers excellent strength, embeddability, and resistance to fatigue, making it suitable for high-load engine conditions.

Are these bearings suitable for a daily driver or only race cars?

While called 'Race Series,' these bearings are well-built and can be used in performance street engines as well as dedicated race applications. They offer improved durability and oil control compared to standard bearings, which can benefit any engine build where reliability is a priority.

ACL Connecting Rod Bearing Set 8B663H-020

Name: ACL Chevrolet V8 305-350-400 Race Series Engine Connecting Rod Bearing Set
Brand: ACL
Price: 80.15 USD
Availability: InStock

ACL Chevrolet V8 305-350-400 Race Series Engine Connecting Rod Bearing Set

$80.15

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ACL Chevrolet V8 305-350-400 Race Series Engine Connecting Rod Bearing Set

Key Features

Fits 112+ vehicle make/model combinations.
ACL Race Series connecting rod bearings are built for performance applications.
This set is 0.020 inch undersize for use with machined crankshafts.
Features a tri-metal overlay for improved strength and durability.
Designed to provide precise oil clearance for V8 engines (305, 350, 400 ci).

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Product Details

When you're rebuilding a Chevrolet V8 engine, especially one with a 305, 350, or 400 cubic inch displacement, getting the right connecting rod bearings is crucial for performance and longevity. These Race Series bearings from ACL are built for demanding applications where oil clearance is critical. They are designed to provide a precise fit and reliable operation for your engine build.

ACL has been making engine bearings for a long time, and their Race Series is a popular choice for those looking for a well-built component. This particular set is 0.020 inch undersize, which is important to note if you're machining your crankshaft. Using the correct undersize bearing ensures you achieve the proper oil clearance, which is vital for preventing bearing failure and ensuring the engine runs smoothly. These bearings are made with a tri-metal overlay for strength and durability under high loads.

If you're in the middle of an engine overhaul or a performance build, these ACL connecting rod bearings are a solid option. Make sure to verify your crankshaft's journal size to confirm that the 0.020 inch undersize is what you need. Proper installation and adherence to oil clearance specifications are key to getting the most out of these bearings.