What happens if you put an underdrive pulley on a Mustang?
Since underdrive pulleys slow down the operation of the water pump and alternator, particularly at idle, overheating (rather, above average heating due to a diminished coolant flow rate at idle) and low voltage can occur if your Mustang is already showing signs of these problems before installing underdrive pulleys.
Is there an alternative to under drive pulleys?
Another option aside from under drive pulleys is removing accessories altogether. Both the A/C (if equipped) and the smog pump (if equipped) are both expendable accessories that will not really have a noticeable impact on driveability and will free up a little power, not to mention some space in the engine bay.
When did they start using underdrive pulleys in cars?
With the introduction of a single serpentine belt becoming common in the ’80s, the idea of using underdrive pulleys to enhance the performance of streetcars was born. While the underdrive pulley is most commonly associated with the 5.0 Fox-Body Mustang, they were also available for several other vehicles as well.
How does an underdrive ratio work on a Mustang?
So as the engine is turning at 3000 RPM, the accessory is being rotated slower, which in turn, reduces parasitic drag from the accessory, as the engine doesn’t have to spin that particular accessory as fast. As mentioned earlier, to accomplish an underdrive ratio, you can change either the crankshaft pulley or the accessory pulleys.
What kind of pulley does a Mustang 5.0 have?
While the underdrive pulley is most commonly associated with the 5.0 Fox-Body Mustang, they were also available for several other vehicles as well. How do Mustang Underdrive Pulleys Work?
Why are underdrive pulleys used on Hot Rods?
by Chris Stevenson. Underdrive pulleys on vehicles have been around since the 1950s, commonly mounted on street performance hot rods, and much later on the Ford Mustang. Underdrive pulleys, when applied to the accessory components of a vehicle, drive the components at a lesser speed because of their increased diameter size.
Another option aside from under drive pulleys is removing accessories altogether. Both the A/C (if equipped) and the smog pump (if equipped) are both expendable accessories that will not really have a noticeable impact on driveability and will free up a little power, not to mention some space in the engine bay.
So as the engine is turning at 3000 RPM, the accessory is being rotated slower, which in turn, reduces parasitic drag from the accessory, as the engine doesn’t have to spin that particular accessory as fast. As mentioned earlier, to accomplish an underdrive ratio, you can change either the crankshaft pulley or the accessory pulleys.