Rpm Activated Switch Kit

The MSD RPM Activated Switch Kit (Model 8950) is a chip-adjustable, single-circuit RPM switch designed for performance ignition systems that require precise engine speed-based control. This MSD Ignition component enables users to activate auxiliary circuits—such as fuel pumps, nitrous systems, or cooling fans—at user-defined RPM thresholds, making it essential for tuned engines, drag racing applications, and high-performance street vehicles where RPM-dependent switching improves reliability and efficiency.

The kit features adjustable chip-based calibration, allowing technicians to set the activation point anywhere within the switch's operational range without requiring firmware updates or complex reprogramming. This modularity simplifies installation on both carbureted and fuel-injected platforms and integrates readily with MSD's broader ignition control ecosystem. The single-circuit design focuses dedicated switching capacity on one critical function, reducing electrical load distribution and minimizing potential interference with primary ignition events.

Buyers typically specify this switch when building race engines, upgrading carburetor-based hot rods with electronic fuel pump control, or adding nitrous oxide systems that must engage only above safe RPM levels. Performance tuners and engine builders rely on MSD's RPM-sensing products to prevent component damage from premature actuation and to optimize power delivery through staged ignition or fuel system management.

MSD Ignition's reputation in the performance automotive aftermarket centers on precision timing control and auxiliary system integration. The RPM Activated Switch Kit represents the company's focus on tunable, modular components that give builders granular control over engine management without requiring full standalone ECU replacement. For applications where simple, field-adjustable RPM switching is needed, this kit delivers proven reliability and flexibility.