What does the .001 undersize mean for these bearings?

The .001 undersize means these bearings are slightly smaller than standard size. They are intended for use with a crankshaft that has been machined down by .001 inches, ensuring proper oil clearance and a secure fit in the connecting rod.

What is the benefit of the CT-1 coating?

The CT-1 coating on these ACL bearings helps to reduce friction during engine operation. It also improves the bearing's ability to embed small particles of debris, which can prevent damage to the bearing surface and crankshaft in high-performance engines.

Are these bearings suitable for a stock engine rebuild?

These are ACL Race Series bearings, designed for performance and racing applications. While they can be used in a modified stock engine, they are best suited for builds where increased horsepower, torque, or sustained high RPMs are expected. For a standard, stock rebuild, a different bearing series might be more appropriate.

Specifications

Brand: ACL
Part #: 8B663HC-001
UPC: 9315726463987

ACL Chevrolet V8 305-350-400 Race Series .001 Rod Bearing Set - CT-1 Coated

Name: ACL Chevrolet V8 305-350-400 Race Series .001 Rod Bearing Set - CT-1 Coated
Brand: ACL
SKU: acl-acl-chevrolet-v8-305-350-400-race-series-001-rod-bearing-set-ct-1-coated-t14-372790
Price: 161.25 USD
Availability: BackOrder

$161.25

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Key Features

Fits 112+ vehicle make/model combinations.
ACL Race Series rod bearing set for Chevrolet V8 305-350-400 engines.
Features a .001 inch undersize for specific engine build requirements.
CT-1 coating helps reduce friction and embed debris.
Well-built with tighter tolerances for performance applications.
Designed to handle increased loads and heat in modified engines.

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About this part

Product Details

Already running a built V8 engine? This ACL Race Series rod bearing set is the next piece of the puzzle for serious performance builds. These bearings are specifically made for Chevrolet V8 engines displacing 305, 350, and 400 cubic inches. They feature a .001 inch undersize, which is crucial for engines that have been line-bored or have had the crankshaft ground undersize to ensure proper oil clearance and bearing crush.

ACL uses a specialized CT-1 coating on these bearings, which helps to reduce friction and improve their ability to embed debris. This coating is a notable advantage in high-performance applications where oil flow and cleanliness can be critical. The Race Series design means they're built with tighter tolerances and a stronger overlay material compared to standard bearings, helping them withstand the increased loads and heat found in performance engines. They are well-built to handle the demands of racing or heavily modified street applications.

When you're building an engine for performance, getting the bearing clearances just right is key. These .001 undersize bearings are designed to work with a crankshaft that's been machined to match, ensuring you achieve the optimal oil film thickness for lubrication and protection under stress. Always refer to your engine builder's specifications or the manufacturer's installation guide for precise clearance and installation details.