BC0028B – Honda B18/B20 Stroker Kit – 95mm Stroke Billet/ProH625+ Rods (5.394″)

The Brian Crower BC0028B Stroker Kit is the definitive engineering solution for builders seeking to extract the ultimate in displacement and reliability from the revered Honda B-Series platform. This is not a collection of catalog parts but a cohesive, precision-engineered system designed to transform your B18 or B20 block into a formidable 2.16L stroker motor. Centered on a monumental 95mm stroke billet crankshaft and paired with the legendary strength of ProH625+ connecting rods, this kit delivers a significant increase in torque and horsepower while maintaining the high-RPM character intrinsic to Honda’s performance heritage. For the serious constructor targeting forced induction applications, all-out N/A builds, or simply the most over-engineered and durable street engine possible, the BC0028B represents the pinnacle of aftermarket component integration. Every element, from the custom forged pistons to the high-grade fasteners, is specified to work in unison, providing a foundation capable of supporting well over 500 horsepower with absolute confidence.

Design Philosophy: The Balanced Stroker Equation

Stroking an engine is a classic method for increasing displacement, but it introduces unique engineering challenges, particularly in a high-winding, short-stroke engine like the B-Series. The primary goal is to increase the crankshaft’s stroke—the distance the piston travels—thereby enlarging the cylinder’s swept volume. However, a longer stroke alters piston speed, rod angularity, and overall dynamic balance. The BC0028B kit is engineered to master these variables. The 95mm stroke crank is a masterpiece of billet steel, offering superior grain structure and fatigue resistance over a forged or cast unit. Its design meticulously maintains proper counterweighting and oiling for the increased stroke, ensuring smooth operation even at an 8000+ RPM redline. This is not merely a “longer” crank; it is a purpose-built component that redefines the B-Series’ volumetric potential without compromising its spirited nature.

Core Component Breakdown: Crank, Rods, and Pistons

The synergy between the three major rotating assembly components is where the BC0028B kit proves its worth. The 95mm Stroke Billet Crankshaft is the heart of the system. Machined from a single block of premium 4340 steel, it undergoes advanced heat-treating and micro-polishing of all journal surfaces to reduce friction and increase fatigue life. The ProH625+ Connecting Rods are the critical link. Manufactured from 4340+ steel, these “H-beam” design rods feature a shot-peened finish for stress relief and ARP 2000 cap screws as standard. Their 5.394″ (137mm) length is specifically calculated for this stroker application, optimizing the rod-to-stroke ratio to mitigate excessive piston side-loading and maintain favorable cylinder wall alignment.

Completing the assembly are the Custom Forged Pistons. These are not off-the-shelf slugs but are specifically designed for this 95mm stroke and 5.394″ rod combination. Typically forged from 2618 aluminum alloy, they offer exceptional strength and ductility for high-boost or high-nitrous applications. They include features like valve reliefs cut for aggressive camshaft profiles, a low-friction skirt coating, and are supplied with a fitted set of pins and high-performance spiral locks. The piston’s compression height is precisely machined to achieve your target deck height and compression ratio, which is typically specified at the time of order to match your cylinder head and fuel system.

Performance Benefits and Engineering Advantages

The immediate and measurable advantage of the BC0028B kit is the displacement increase to approximately 2.16 liters (2160cc), a significant jump from a B18C1’s 1.8L or a B20’s 2.0L. This translates directly to a broader, flatter torque curve, providing stronger mid-range pull and reducing the dependency on peaky, high-RPM power bands. The engineering benefits, however, run deeper.

• Maximized Displacement: Achieves the ultimate NA or forced induction displacement for a standard-bore B-series block, maximizing cylinder pressure and airflow potential.
• Unmatched Rotating Assembly Strength: The billet crank and ProH625+ rod combination is arguably the strongest rotating assembly available for a street-driven B-series, offering a massive safety margin for high-horsepower applications.
• Optimized Dynamics: The carefully selected rod length maintains a functional rod-to-stroke ratio, preserving engine longevity and reducing parasitic friction losses compared to poorly calculated stroker combinations.
• Foundation for High RPM: Despite the increased stroke, the quality of components allows the engine to safely explore high RPM ranges, maintaining the B-series’ signature powerband characteristics.
• Complete Kit Solution: Eliminates guesswork in component compatibility. Includes all necessary bearings (typically ACL Race Series), balancing, and fasteners for a turnkey rotating assembly build.

Vehicle Fitment & Application Notes

Vehicle Fitment: This kit is designed for the Honda B18 and B20 series four-cylinder engines. Specific application requires matching the correct piston diameter to your block’s bore size (e.g., 81mm, 84mm).

• Honda Integra: All years and models equipped with B18A, B18B, B18C (GS-R), or B20B/Z engines.
• Honda Civic: 1992-2000 models (EG, EK chassis) with B-series swaps, particularly those utilizing a B18C1/C5 or B20 block.
• Acura Integra: 1994-2001 (DC chassis) with B18B, B18C1, or B18C5 (Type R) engines.
• CR-V: First-generation models with the B20B/Z engine, ideal for high-torque turbo builds.

Critical Application Notes: Installation of this stroker kit is a precision engine-building operation. Block machining, including possible cylinder boring/honing, deck resurfacing, and critical clearances checking (crank/main/rod bearing, piston-to-wall, piston-to-deck) is absolutely mandatory. The kit is ideally suited for turbocharged, supercharged, or high-compression naturally aspirated builds. Engine management tuning is required to properly calibrate for the increased displacement and any change in compression ratio. For a deeper technical understanding of stroker motor mechanics and their impact on engine dynamics, we recommend this authoritative resource on stroker motor fundamentals.

Technical Specifications & Build Considerations

Before committing to this build, understand the precise specifications and ancillary requirements. This kit elevates your engine’s potential but demands complementary components for a successful outcome. You will require performance cylinder head components (valves, springs, camshafts) capable of flowing air for the increased displacement, a fuel system matched to your power goals, and a capable tuning solution. The bottom-end foundation provided by the BC0028B is what allows the rest of your performance parts to realize their full potential.

*Kit contents (bearing brand, ring type) may vary. Confirm exact specifications with your retailer at time of purchase. Professional balancing is highly recommended and often available as a service.