Overview

Summit Racing™ Pro BBC Big Nasty Stroker Edition LS Firing Order Hydraulic Roller Cams

Summit Racing™ Pro BBC Big Nasty Stroker Edition LS Firing Order (specifically 4-7 swap) hydraulic roller cams are U.S.-made, high performance camshafts designed to improve big block Chevy efficiency by reducing harmonics and improving combustion, often featuring specs tailored for modern beehive valve springs. These cams require specific 1-8-7-3-6-5-4-2 spark plug wire routing, a cam button, and a melonized/composite distributor gear.

Key features and technical details:

* Firing order: These cams utilize the GM LS-style firing order (4-7 swap), which moves the firing pair closer to the water pump for better cooling and reduced detonation, along with better bearing life and reduced vibration
* Design and material: Made from hardened bearing steel billets and ground on a Landis 3L
* Valve springs: Designed for stability at high RPM with modern Beehive or lightweight small-diameter dual springs
* Specific recommendations: For models like the Summit Pro BBC 4-7 Swap, a cam button, melonized or composite distributor gear, and billet-compatible fuel pump pushrod are required
* Performance application: Available in multiple stages to cover street/towing, street/strip, and drag racing applications
* Big Nasty and Performance models:
-- Summit Big Nasty cam: Specifically, some Big Nasty branded options in this series feature approximately .550 in. lift with a 218 degree/230 degree duration split and a tight LSA to produce massive torque
-- Performance: These cams are designed for strong mid-range and top-end power, with some applications specifically designed to maximize power under the curve

Applications

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