Overview

Summit Racing™ Pro SBC Big Nasty Hydraulic Retro-Fit Roller Cams

Summit Racing™ Pro SBC Big Nasty hydraulic retro-fit roller cams are high performance, American-made camshafts designed for traditional small block Chevy engines, featuring modern LS-engine firing orders (4-7-3-2) for improved torque, better combustion efficiency, and reduced vibration.

Key features and benefits:

* LS Firing Order: These cams update the classic SBC firing order to the newer, more efficient LS order (1-8-7-2-6-5-4-3)
* Retro-fit design: Designed for early model SBC engines that did not come with factory roller cams, allowing for the use of modern roller technology without specialized block machining
* Performance stages: Available in multiple stages (up to 7 options), ranging from smooth-idle towing cams to high-duration, high-lift cams designed for racing
* Engineered quality: Precision-ground on USA steel billets using advanced CNC grinders for superior quality

Big Nasty performance specs (example): One version of the Big Nasty (Stage 4) is known for its aggressive nature and significant power improvements over stock and mild cams.

* Operating range: Optimized for strong mid-to-high RPM power (typically 1,500 – 6,000+ rpm, depending on specific part number)
* Sound: Produces a noticeable or "nasty" idle while still being streetable
* Compatibility: Designed for 3-bolt timing sets, and if used in a pre-1986 block, a cam button is required to manage cam endplay.

Why switch to an LS firing order?

* Using the LS firing order on a classic SBC provides several benefits:
-- Reduced Detonation: Improves combustion chamber cooling.
-- Increased Torque/Power: Optimizes combustion for improved performance.
-- Durability: Helps improve bearing life and reduce engine vibration

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