Crank Pulley SBC LWP Serpentine Conversion

The March Performance Crank Pulley SBC LWP Serpentine Conversion is a high-performance crankshaft pulley engineered for small block Chevy engines transitioning to modern serpentine belt systems. This 7-inch diameter aluminum pulley delivers a high water flow ratio, optimizing coolant circulation while maintaining compatibility with long water pump configurations. The clear powder-coat finish provides corrosion resistance and a professional appearance, while the 6/6-rib serpentine profile ensures positive belt grip and reliable power transmission across multiple engine accessories.

The high water flow ratio design is critical for engine builders prioritizing thermal management. Unlike restrictive factory pulleys, this conversion pulley maintains elevated coolant velocity through the block and cylinder heads, which is particularly important during sustained high-RPM operation or when running tight tolerances on modern small block builds. The serpentine conversion eliminates multiple V-belts in favor of a single efficient belt system, reducing parasitic drag and improving accessory drive reliability. Hardware is included for straightforward installation, and the aluminum construction keeps rotating mass minimal—a key consideration for engines targeting improved throttle response and acceleration feel.

This pulley is ideal for small block Chevy engine swaps, restorations, and performance builds where upgrading from dated V-belt systems to modern serpentine drives is a priority. Street cars, vintage builds, and vintage-style hot rods benefit from the cleaner engine bay layout and reduced maintenance that serpentine systems provide. The long water pump compatibility ensures this pulley integrates with both classic and contemporary cooling configurations, giving builders flexibility in sourcing donor components or matching OEM-style cooling loops.