Dry Sump Drive Pulley 20T- Radius Tooth

The Dry Sump Drive Pulley 20T Radius Tooth from Moroso is a precision crankshaft pulley engineered for high-performance oil pump drive systems. Built for serious engine builders and mechanics running dry sump lubrication setups, this HTD (Helical Tooth Drive) pulley ensures positive engagement with matching serpentine belts and eliminates slippage under demanding conditions. It's the critical component that synchronizes pump operation with engine speed, making it essential for forced-induction builds, race engines, and any application where reliable scavenging is non-negotiable.

Machined from lightweight aluminum and hard-anodized black for corrosion resistance and durability, the Dry Sump Drive Pulley 20T Radius Tooth features a 20-tooth HTD profile with a 1-inch belt width and 5/8-inch mandrel bore. The 1/8-inch keyway accommodates standard crankshaft keystock, ensuring solid mechanical lock-up and zero runout during high-RPM operation. Radius tooth geometry provides smoother acceleration and reduced backlash compared to older trapezoidal designs, protecting pump gears and extending overall system life. At 0.22 lbs, the pulley maintains rotating mass discipline while delivering structural rigidity where it counts.

Installation works seamlessly with Moroso's dry sump pump drive packages and any HTD belt system engineered for auxiliary crankshaft accessory drives. Technicians appreciate the precise bore and keyway tolerances, which eliminate shimming and align the pump without fussing. Whether you're building a LS platform racer, turbocharged street engine, or competition motor, this pulley integrates directly into existing Moroso oil pump drive setups and compatible aftermarket systems. Verify your belt pitch and mandrel diameter before purchase to guarantee compatibility with your specific crankshaft configuration.