What is the purpose of the adjustable keyways on the crankshaft sprocket?

The crankshaft sprocket has three keyway settings: -4, 0, and +4 degrees. This allows you to adjust the engine's valve timing relative to the crankshaft, which can be used to fine-tune performance based on engine modifications.

What is the difference between a Torrington thrust bearing and a brass wear shim?

Both the Torrington thrust bearing and the brass wear shim are designed to manage the thrust load on the camshaft sprocket. The Torrington bearing is a roller bearing, while the brass shim is a solid piece that helps prevent wear.

What does it mean that this timing chain kit is .005 inches shorter?

This indicates that the overall length of the timing chain in this kit is 0.005 inches less than a standard-sized chain. This measurement is important for ensuring proper tension and alignment during installation.

Specifications

Brand: Manley Performance
Part #: 73171
UPC: 807298016337

Manley Race Roller Timing Chain Kit - Small Block Chevrolet - Short

Name: Manley Race Roller Timing Chain Kit - Small Block Chevrolet - Short
Brand: Manley Performance
SKU: manley-performance-manley-race-roller-timing-chain-kit-small-block-chevrolet-sho-t14-881747
Price: 128.69 USD
Availability: BackOrder

$128.69

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Manley Performance roller timing chain kit for Small Block Chevrolet. Features a steel crank sprocket and roller chain for precise timing.

Key Features

Fits Small Block Chevrolet engines.
Steel crankshaft sprocket with three keyway settings (-4, 0, +4 degrees).
Cast camshaft sprocket includes a Torrington thrust bearing or brass wear shim.
Roller chain features .250-inch diameter rollers for durability.
Includes a brass shim and a double roller chain.
This kit is .005 inches shorter than standard.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

Manley Performance is well-known for making strong internal engine components, and this roller timing chain kit for Small Block Chevrolet engines is no exception. This kit is designed to give you precise control over your engine's timing, which is crucial for performance and smooth operation. It replaces your stock timing set with a more robust and adjustable setup.

The kit includes a fully machined steel crankshaft sprocket that offers three different timing settings: -4, 0, or +4 degrees. This adjustability lets you fine-tune your engine's timing to get the most out of it, especially if you've made other modifications. The camshaft sprocket is cast and comes with either a Torrington thrust bearing or a brass wear shim, depending on the specific Chevrolet kit, to handle the thrust loads. The roller chain itself uses .250-inch diameter rollers, which are built to last and maintain accurate timing over time.

This particular kit is specified as being .005 inches shorter than standard, which is a detail to note during installation. It also includes a brass shim, and the chain is a double roller design for added durability.