What is the benefit of a 'narrowed' bearing profile?

A narrowed bearing profile is useful when the crankshaft or main housing bore dimensions are slightly outside of standard specifications, often due to aftermarket parts or machining. It helps ensure the bearing has the correct clearance and doesn't bind.

Why is a dowel pin important on these rod bearings?

The dowel pin is a small protrusion that fits into a corresponding notch in the engine block or connecting rod. It prevents the bearing from spinning within its housing, which is critical for maintaining proper oil clearance and preventing engine damage under high loads.

What does 'Race Series' mean for these bearings?

The 'Race Series' designation indicates that these bearings are built with tighter tolerances and materials suited for high-performance and racing applications. They are designed to withstand the increased stress and heat generated by engines used in demanding conditions.

Specifications

Brand: ACL
Part #: 8B743HND-001

ACL Chevrolet V8 396-402-427-454 Narrowed Race Series with Dowel Engine Connecting Rod Bearing Set

Name: ACL Chevrolet V8 396-402-427-454 Narrowed Race Series with Dowel Engine Connecting Rod Bearing Set
Brand: ACL
SKU: acl-acl-chevrolet-v8-396-402-427-454-narrowed-race-series-with-dowel-engine-conn-t14-630673
Price: 144.78 USD
Availability: BackOrder

$144.78

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Key Features

Fits Chevrolet V8 engines 396-402-427-454 cubic inches.
Narrowed bearing profile for improved clearance in performance applications.
Dowel pin provides positive location for secure fitment.
Race Series construction for demanding engine use.
Designed for Chevrolet models from 1965-1974.

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About this part

Product Details

ACL has been making engine bearings for decades, and these Narrowed Race Series connecting rod bearings for your Chevrolet V8 are one of their staples. These bearings are built for performance applications, featuring a narrowed profile that helps ensure proper clearance in high-stress situations. The addition of a dowel pin provides positive location, which is crucial for keeping the bearings seated correctly under aggressive driving conditions.

These bearings use a Race Series design, which means they're constructed with materials and tolerances suited for engines that see hard use. The narrowed design is particularly helpful if you're working with aftermarket crankshafts or if you've had machine work done that affects the main housing bore. They are designed to fit Chevrolet big-block V8 engines displacing 396, 402, 427, and 454 cubic inches, covering a wide range of performance builds from the mid-60s through the mid-70s.

When you're rebuilding or modifying a performance V8, getting the bearing clearances right is key to engine longevity and power. These ACL bearings offer a well-built solution for those looking to ensure their connecting rod journals are properly supported. Always refer to your engine's specific service manual for correct installation procedures and torque specifications.