COMP Cams Camshaft CS 305Qio8

This is the COMP Cams CS 305Qio84Pt camshaft, a hydraulic roller designed for a wide range of Chevrolet Small Block engines from 1958 through 2002, covering displacements from 262 to 400 cubic inches. It's particularly recommended for larger displacement and high compression builds, especially those using a 3500+ stall torque converter. This camshaft is built to optimize valve events, a critical step in making more power by ensuring valves open and close at the most effective times. By doing this, it aims to increase the area under the power curve and improve stability at higher RPMs.

What sets this camshaft apart is its unique 4-Pattern design, inspired by NASCAR technology. Unlike traditional camshafts with a single intake and exhaust profile, this one features two distinct intake and two distinct exhaust lobe profiles. This allows it to account for the differing runner lengths found in most V8 intake manifolds, where outboard runners are longer than inboard ones. By adjusting valve timing for these differences, it helps balance the air/fuel mixture across cylinders, potentially leading to significant gains in peak horsepower and overall engine response. The camshaft itself is CNC-machined from a steel billet core, ensuring a well-built and durable component. It also features a tight lobe separation angle, which contributes to both strong performance and a desirable, throaty exhaust note.

To get the most out of this camshaft, you'll need upgraded valve train components and aftermarket cylinder heads. It's crucial to note that this camshaft is optimized for use with a melanized or nitrided distributor gear. Using a cast iron or steel gear without a similar surface treatment will void the warranty. If your engine is an '87 or newer Small Block that came with provisions for roller lifters but doesn't have them installed, you may need a COMP Hydraulic Roller Lifter Install Kit.