Ballast Resistor 1.82 Ohms

The Ballast Resistor 1.82 Ohms (MOROSO MPN 72390) is a precision ignition component designed to regulate voltage and current flow in classic and vintage ignition systems. This ballast resistor serves as a critical protective element for distributor points and coils, ensuring stable electrical performance and extended component lifespan. Enthusiasts restoring muscle cars, hot rods, and classic vehicles rely on this OEM-style resistor to maintain factory-correct ignition characteristics and reliable starting performance.

The 1.82-ohm resistance rating is engineered to reduce voltage to the ignition coil during engine operation while allowing full voltage at startup for reliable cold-start firing. This stepped-resistance design protects points from excessive current draw and heat buildup, preventing premature erosion and pitting that can compromise ignition timing. The compact construction and durable ceramic core allow the resistor to withstand underhood temperatures and vibration while maintaining consistent electrical values across thousands of engine cycles.

Technicians and restoration specialists choose MOROSO ballast resistors for their accuracy and reliability in points-based ignition systems common to vehicles built through the 1980s. Installation is straightforward, typically mounted near the coil or firewall in the original factory location. Whether you're rebuilding a distributor-equipped engine or maintaining a classic-car collection, this 1.82-ohm resistor delivers the electrical precision necessary for consistent cold starts and smooth idle performance under all operating conditions.