hi guys
can anyone tell me what 'overrun' means in car terms
thanks.
I always heard that term used when a car continued to run for a bit when the ignition was turned off back when we had carbs on cars.
Overrun conditions occur when the momentum of the vehicle causes the engine to turn faster than it would have been otherwise. The faster turning engine is trying to take in air that corresponds to the speed at which it is turning. The air intake is partially restricted by the throat valve. This results in a high vacuum that forms in the inlet manifold.
This help?![]()
Tut tut![]()
I always heard that term used when a car continued to run for a bit when the ignition was turned off back when we had carbs on cars.
Something that happens when you take your foot of the gas when still in gear = overrun.