What is the compression distance and wrist pin size for these pistons?

These JE Pistons feature a compression distance of 1.120 inches and a wrist pin diameter of 0.990 inches. This information is critical for calculating your engine's compression ratio and ensuring proper connecting rod fitment.

What is the benefit of the Forged Side Relief (FSR) design?

The FSR design reduces skirt width and uses a shorter wrist pin. This combination helps minimize friction and power loss while also saving weight, contributing to overall engine efficiency and performance.

Are these pistons suitable for naturally aspirated engines as well as nitrous?

While designed for NOS applications, the high tensile strength of the 2618 aluminum and the specific design features make them well-suited for high-demand performance engines, including naturally aspirated builds that require robust components.

JE Pistons BBC 632 NOS Piston Set 293083

Name: JE Pistons BBC 632 NOS Set of 8 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-bbc-632-nos-set-of-8-pistons-t14-295915
Price: 1232.52 USD
Availability: BackOrder

JE Pistons BBC 632 NOS Set of 8 Pistons

$1232.52

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

JE Pistons BBC 632 NOS Set of 8 Pistons. Forged in the USA from 2618 aluminum for high-demand performance.

Key Features

Set includes 8 pistons for 8-cylinder engines.
Forged in the USA from 2618 aluminum for high tensile strength.
Proprietary Forged Side Relief (FSR) design minimizes friction and saves weight.
Features a 4.600-inch bore and 0.990-inch wrist pin.
Dome volume is 29.9 cc, affecting compression ratio.
Designed specifically for each engine and use application for optimized performance.

This piston set is designed for BBC (Big Block Chevrolet) engines with a 632 cubic inch displacement and specific bore size. Check manufacturer specifications for complete compatibility details.

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Product Details

Forged in the USA from 2618 aluminum, these JE Pistons are built for serious performance applications. This set is specifically for BBC (Big Block Chevrolet) engines with a 632 cubic inch displacement and is designed to handle nitrous oxide (NOS) applications. The 2618 aluminum alloy offers high tensile strength, which is crucial when you're pushing an engine hard, especially with the added boost from nitrous.

JE Pistons incorporates a proprietary Forged Side Relief (FSR) forging design. This means they've reduced the skirt width and used a shorter wrist pin, which not only saves weight but also helps minimize friction and power loss. Depending on the specific application, these pistons may also feature an accumulator groove. This groove helps manage combustion gas pressure, reducing ring flutter and ensuring a consistent ring seal for reliable power delivery. Some applications also include a skirt coating designed to cut down on friction and wear between the piston skirts and cylinder walls, which can also lead to quieter operation.

This kit includes eight pistons, each with a 4.600-inch bore, a 1.120-inch compression distance, and a 0.990-inch wrist pin. The dome volume is 29.9 cubic centimeters, which will affect your engine's compression ratio depending on your cylinder heads. It's important to note that these pistons are not CARB approved and cannot be shipped to California. If you're building a high-performance BBC engine and need pistons that can handle the demands of nitrous, this set from JE Pistons is a solid option.