JVY
Active Member
These pic's on the MGA forum hopefully explain.
The rev-limiter arm is the larger one in the top 2 pic's.
http://mgaguru.com/mgtech/ignition/ig111a.htm
The rev-limiter is quite simple in operation. It is designed so that the centrifugal force acting on a sliding contact will overcome the resistance of the springs as a certain rpm is reached. At this rpm, the contact shorts the HT to chassis and this means you lose ignition on all for cylinders. Obviously, this will keep the engine rpm below the "cut-out" rpm of the rotor arm.
The rev-limiter arm is the larger one in the top 2 pic's.
http://mgaguru.com/mgtech/ignition/ig111a.htm
The rev-limiter is quite simple in operation. It is designed so that the centrifugal force acting on a sliding contact will overcome the resistance of the springs as a certain rpm is reached. At this rpm, the contact shorts the HT to chassis and this means you lose ignition on all for cylinders. Obviously, this will keep the engine rpm below the "cut-out" rpm of the rotor arm.
