High-Range Rev Limiter (12 Volts) with Dual Magnetos

The ETC Inc. High-Range Rev Limiter is a unique control device that has been designed to work with all Mallory Magnetos. Models are also available for the Vertex Standard Internal Coil and External Coil Magnetos. Other types of ignition are available on request.

Adjustable RPM limiting is provided by an adjustable push wheel switch which selects the RPM in increments of 100 from 2,000 to 9,900 RPM. Limiting is accomplished by causing a programmed misfire sequence of the engine when the RPM exceeds the set point.

It does not short the mag or alter the magneto performance in any way. It is completely safe with a supercharged engine and will not cause backfire or crossfire in the cap which causes catastrophic engine damage. This unit has been designed using the newest linear, digital, and power devices. The device weighs only eight ounces and is small in size at 4.0” x 2.25” x 1.80” with two additional one-inch mounting flanges on each side.  It has a mounting plate with holes for grommets and/or DZUS fasteners. This rev limiter has been designed to operate in the presence of mechanical vibrations and high electrostatic ignition noise generated by magneto ignition systems.

Caution: It is imperative that both magnetos' timing is synchronized together within one degree. The blue wires are connected to the primary side of each magneto kill switch. 

The optional tachometer output is capable of readings of +12,000 RPM. It is an integral part of the signal input of the magneto and will indicate RFI (radio frequency interference) of the ignition system. It is a valuable addition to the rev limiter. We also make two versions. One being a 5-volt square wave output and the other being a 12-volt square wave output for accommodation of variety of tachometers.

The optional burn-out rev limiter to pre-set to your RPM choice. It is actuated by 12-volt input on the brown wire and used to make tire temperatures more consistent for reliable launches.

[click to enlarge diagram]