Brian Crower Crankshaft - Nissan VQ37HR 92mm Stroke 4340 Billet Unbalanced

Brian Crower is well-known for making strong internal engine components for performance applications. This crankshaft is built for the Nissan VQ37HR engine, offering a 92mm stroke to increase displacement and potential power. It’s forged from 4340 billet steel, a material chosen for its excellent strength and durability under high stress, making it a solid choice for serious engine builds. This crankshaft is unbalanced, meaning it's designed to be paired with specific rotating assembly components like pistons and connecting rods that will be balanced together as a complete unit by a professional engine builder.

The 92mm stroke is a notable increase over the stock stroke, which helps to increase the engine's displacement. This larger displacement, combined with proper tuning and other supporting modifications, can lead to significant gains in horsepower and torque. The 4340 billet steel construction means this crankshaft can handle the increased cylinder pressures and rotational forces that come with a performance-oriented engine build. It’s designed to be a direct replacement for the factory crankshaft in a range of Infiniti and Nissan vehicles, including models like the Nissan 370Z, Infiniti G37, and Infiniti Q50.

When building a high-performance engine, the crankshaft is the backbone of the rotating assembly. This Brian Crower unit is built to withstand the demands of boosted or high-revving applications. Because this crankshaft is unbalanced, it is crucial that you work with an experienced engine builder to ensure the entire rotating assembly—crankshaft, connecting rods, pistons, and harmonic balancer—is properly balanced to minimize vibrations and ensure long-term reliability. This ensures that the engine runs smoothly and efficiently, even under extreme conditions.