BC0022 – Honda/Acura B18A/B Stage 2 Camshafts – Normally Aspirated Spec

Unlock the True Potential of Your B-Series: The BC0022 Stage 2 Camshafts

For the dedicated Honda/Acura B18A1 and B18B1 builder, the pursuit of power is a precise science. The factory camshafts, while reliable, represent a significant bottleneck in the engine’s volumetric efficiency, particularly in the upper RPM range where these DOHC engines love to live. The Brian Crower BC0022 Stage 2 Camshaft Set is the definitive solution, engineered to transform your normally aspirated B18A/B from a subdued commuter into a visceral, high-revving performer. This isn’t a generic “hot cam” kit; it’s a calculated upgrade designed for the “hot street/strip” enthusiast who demands a broad, usable powerband without sacrificing daily driveability. By meticulously increasing valve lift and duration, these camshafts unlock substantial horsepower and torque gains by dramatically improving the engine’s ability to breathe, making them the cornerstone of any serious B18 non-VTEC build.

Engineering Philosophy: Precision for the Normally Aspirated B-Series

Brian Crower’s approach with the BC0022 cams is rooted in a deep understanding of the B18A/B platform’s limitations and potential. Designed specifically for non-VTEC applications, these cams target the critical mid-to-high RPM power deficit. The profile is engineered to increase the area under the valve-lift curve, a key metric for airflow. This is achieved not just by higher peak lift, but through optimized ramp rates and duration that allow the valves to open quicker, stay open longer at near-max lift, and close in a controlled manner. The lobe separation angle (LSA) is strategically narrowed from the factory spec to increase cylinder pressure and improve mid-range torque, while the increased overlap—carefully managed for a streetable idle—enhances scavenging at higher RPMs, pulling more fresh charge into the cylinder. This holistic design ensures that gains are realized across the tachometer, not just at a peak dyno number.

Core Performance Benefits & Design Features

The installation of the BC0022 camshafts represents a systemic upgrade to your engine’s airflow architecture. To function optimally, they must be paired with complementary valvetrain components and proper engine management. The following list details the direct benefits and requisite considerations for this upgrade:

• Substantial Mid-to-Top End Power Gains: Expect significant increases in horsepower from approximately 4,000 RPM to the 7,200+ RPM redline, shifting the power band upward where the B-series chassis excels.
• Enhanced Volumetric Efficiency: The increased lift and duration allow the engine to ingest a greater mass of air/fuel mixture per cycle, which is the fundamental equation for more power in a naturally aspirated engine.
• Improved Exhaust Scavenging: The designed overlap period helps use the energy of the exhaust pulse to create a low-pressure area, actively drawing in the fresh intake charge for better cylinder filling.
• Requires Supporting Modifications: To realize these cams’ full potential and ensure valvetrain stability, upgrades are mandatory. This includes performance valve springs and retainers to control the higher lift, and adjustable cam gears for precise degreeing and fine-tuning of the power band.
• Necessitates Tuning: The altered airflow characteristics require fuel and ignition timing adjustments. A programmable engine management system (e.g., Hondata, Neptune, AEM) is essential to safely optimize air/fuel ratios and advance curves, preventing lean conditions and detonation.

Vehicle Fitment: Application-Specific Engineering

The BC0022 camshafts are not a universal fit. They are precision-ground for a specific family of engines. Correct fitment is critical for proper valve timing, alignment, and overall performance. This set is engineered exclusively for the following Honda and Acura vehicles equipped with the non-VTEC, B18A1 or B18B1 engine codes:

• Acura Integra (1990-1993): RS, LS, and GS models with the B18A1 engine (140hp).
• Honda Civic (1994-1995): Del Sol VTEC models (utilizing the B18B1 block). Note: Confirmation of engine code is required.

Critical Compatibility Note: These camshafts are NOT compatible with VTEC-equipped B-series engines (e.g., B16A, B18C1/C5). Attempting to install them in a VTEC head will result in incorrect lobe profiles and valve timing. Always verify your engine code before purchase.

Technical Specifications: The Blueprint for Performance

Understanding the hard data behind the BC0022 cams is key to planning your build. The specifications below detail the exact changes from the factory hydraulic profile and provide the metrics needed for ordering complementary valvetrain components and planning your tuning strategy. For a deeper dive into how these specifications translate to real-world performance, consider reading this authoritative resource on camshaft fundamentals and performance theory.

Installation & Tuning Protocol: The Final 20% That Yields 80% of the Result

Simply dropping these cams into a stock engine is an exercise in wasted potential and risk. Professional installation and tuning are non-negotiable. The camshafts must be degreed using adjustable cam gears to ensure the intake and exhaust centerlines are set per the cam card specifications, which dictates where the power band will be positioned. The stock valve springs cannot handle the increased lift and ramp speed, leading to valve float and catastrophic engine failure at high RPM. A dual or beehive spring setup with matching titanium retainers is mandatory. Finally, the ECU must be programmed to deliver more fuel in the mid-range and top end, and ignition timing must be optimized to exploit the improved combustion efficiency. When this protocol is followed, the BC0022 Stage 2 Camshafts become the heart of a responsive, powerful, and reliable naturally aspirated B-series build that honors Honda’s engineering legacy while decisively advancing it.