Overview

Summit Racing™ Pro SBC Big Nasty Hydraulic Roller Cams

Summit Racing™ Pro SBC Big Nasty hydraulic roller cams are American-made, high performance camshafts designed for small block Chevy engines, featuring a .550 in./.550 in. lift, 218 degree/230 degree duration (at .050 in.), and a 105 degree + LSA. They're specifically engineered to provide a classic, aggressive muscle car idle while delivering strong mid-range torque and power (approximately 459 hp/459 lbs.-ft.) for street/strip applications.

Key features and details:

* Performance and sound: The "Big Nasty" (often part of the 4-7 swap series) is known for a very aggressive, choppy idle due to its low 105 degree Lobe Separation Angle (LSA) and 14 degrees of overlap
* LS Firing Order: These cams utilize the modern LS firing order (1-8-7-2-6-5-4-3) on a traditional SBC, which improves engine harmonics and reduces bearing wear
* Construction: Precision-ground on high-quality American steel billets using modern CNC grinders
* Compatibility: Designed as "retrofit" cams for older SBC blocks or for factory roller blocks, with some versions requiring a cam button
* Series options: The "Big Nasty" is part of a broader Summit Pro SBC lineup that includes multiple stages, from mild to heavy-duty race, available in cam-only or kit form (with lifters)
* Performance specs (approximate):
-- Lift: .550 in./.550 in.
-- Duration: 218 degree intake/230 degree exhaust at .050 in.
-- LSA: 105 degrees (with +3 advance)
-- Overlap: 14 degrees
-- RPM range: Strong mid-range power, typically effective for street/strip
* These cams are frequently used in budget-conscious, high performance builds, sometimes compared to "Sloppy Stage" cams

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