BC0032 – Honda H22 Stage 2 Camshafts – Normally Aspirated/High Boost Profile

For the Honda B-series enthusiast seeking the definitive step beyond bolt-ons, the Brian Crower BC0032 Stage 2 Camshafts represent a calculated, precision-engineered leap in volumetric efficiency. Engineered specifically for the revered H22A and H22A1 (H22) DOHC VTEC engines, this grind occupies the critical sweet spot between aggressive street performance and all-out race capability. Unlike generic “stage” labels, the BC0032 profile is the result of exhaustive dyno testing and real-world track data, offering a balanced yet potent increase in lift and duration. This camshaft set is uniquely designed to deliver substantial power gains across a broad RPM band in naturally aspirated applications, while its meticulously selected lobe separation angle (LSA) and valve timing events make it exceptionally resilient and effective in high-boost, forced-induction setups. It is the cornerstone upgrade for builders who understand that genuine power is not found in peak numbers alone, but in the area under the curve and the engine’s ability to breathe efficiently under stress.

The Engineering Philosophy Behind the BC0032 Grind

Brian Crower’s approach to the Stage 2 H22 camshaft is rooted in harmonic performance. The H22 engine, with its relatively long stroke, benefits immensely from cam profiles that enhance mid-range torque without sacrificing top-end horsepower. The BC0032 achieves this through a strategic increase in both intake and exhaust valve lift and duration over stock and mild “Stage 1” grinds. The intake lobe is engineered to accelerate the valve more aggressively, filling the cylinder more completely at higher RPMs. Conversely, the exhaust profile is optimized to efficiently scavenge spent gases, a critical factor in preventing reversion—especially under boost. The selected lobe separation angle is tightened from the stock figure to build more dynamic cylinder pressure at lower RPMs, enhancing throttle response, while the increased overlap is managed to avoid compromising idle quality or low-end vacuum. This is not a drag-race-only cam; it is a system-calibrated component designed to transform the engine’s entire character.

Core Benefits of the BC0032 Camshaft Set

• Broad, Usable Power Band: Engineered for maximum area under the power curve, delivering strong gains from the mid-range (typically 3,500 RPM) all the way to the 8,000+ RPM redline, making it ideal for street, track, and autocross.
• Dual-Application Design: Expertly tuned profiles perform exceptionally well in both high-compression, naturally aspirated builds and high-boost turbocharged or supercharged applications, offering versatility for future power upgrades.
• Optimized for Common Supporting Mods: This camshaft is designed to work in concert with typical H22 Stage 2 build components like valvetrain upgrades, cold-air intakes, performance headers, and engine management, ensuring complementary gains.
• Precision Machined from Billet: Each camshaft is CNC-machined from a single piece of premium chromoly steel billet, ensuring superior structural integrity, perfect lobe geometry, and consistent heat treatment throughout for longevity under high-stress conditions.
• Retains OEM-Like Driveability: Despite its performance focus, the BC0032 profile maintains a stable, lumpy-but-manageable idle and good low-speed vacuum, making it suitable for a performance daily driver with proper tuning.

Technical Specifications & Comparative Analysis

The following table details the exact specifications of the BC0032 camshaft set, providing a clear, quantifiable comparison to the factory H22A camshafts. This data is essential for engine builders to calculate dynamic compression, predict valve-to-piston clearance, and plan their complete valvetrain upgrade strategy.

The increased duration and lift directly translate to a greater volume of air/fuel mixture entering the cylinder and a more complete expulsion of exhaust gases. The tighter 112° LSA increases mid-range torque by creating a more favorable pressure differential for cylinder filling. For a deep dive on how LSA and duration interact in a four-stroke engine, this technical explanation from Engine Labs is an authoritative resource.

Vehicle Fitment & Required Supporting Modifications

Direct Fitment: The BC0032 camshafts are a direct, bolt-in replacement for the following Honda engines and their respective chassis. No machining of the cylinder head is required, but valvetrain and ECU upgrades are highly recommended and often mandatory for safe operation.

• Honda H22A: 1992-1996 Prelude VTEC (JDM & USDM), 1994-2001 Accord SiR (CH/CF chassis)
• Honda H22A1: 1993-1996 Prelude VTEC (USDM)
• Honda H22A4: 1997-2001 Prelude Type SH (USDM) – Note: May require special attention to the ATTS system if equipped.
• Honda F22B (SOHC) Series Engines: Not Compatible. This is a DOHC VTEC-specific component.

Critical Supporting Modifications: Installing these cams without addressing the rest of the system will yield suboptimal results and risk valvetrain failure. At a minimum, plan for:
1. Valvetrain Upgrade: OEM valve springs and retainers are insufficient for the increased lift and RPM. Brian Crower’s dual valve spring and titanium retainer kit (or equivalent) is required to prevent valve float.
2. Engine Management & Tuning: The stock ECU cannot accommodate the altered air/fuel and ignition timing needs. A programmable solution (Hondata S300, AEM Series 2, etc.) with a professional dyno tune is non-negotiable for power, reliability, and drivability.
3. Supporting Bolt-Ons: To realize the full potential, a cold air intake, performance header, and less restrictive exhaust are necessary to minimize intake and exhaust flow restrictions.

Installation Notes & Final Tuning Imperative

Installation requires standard camshaft replacement procedures: proper timing belt/chain alignment, meticulous torquing of cam caps to factory specification, and a new seal. The critical post-installation step is professional tuning. The tuner must adjust fuel maps, ignition timing, and VTEC engagement point to match the new airflow characteristics. In forced-induction applications, the tuner will leverage the cam’s efficient exhaust profile to manage boost pressure and reduce exhaust backpressure, directly impacting turbo spool characteristics and overall power output. The BC0032 is a tool; its final performance is sculpted by the calibrator’s skill. When installed and tuned as a complete system, these cams reliably produce gains of 25-45+ wheel horsepower in an N/A application and can be the key to unlocking safe, efficient power in a high-boost H22, solidifying its status as a legendary four-cylinder powerhouse.