What does upgrading your pulley do?
The combination of a lighter weight pulley with reduced engine load generally yields results of 10-12 whp. Just as with a lightweight flywheel, a lightweight or lightweight underdriven set of STILLEN Performance Pulleys will make the car generally feel more lively and responsive and quicker to both gain or drop revs. Horsepower gains from underdrive pulleys can vary by vehicle, engine, number of accessories and the amount of underdrive (improvements of up to 5–15 HP at the wheels have been seen). Additional and significant performance improvements can be seen by reducing the weight of the pulley versus the original pulley.The combination of a lighter weight pulley with reduced engine load generally yields results of 10-12 whp. Just as with a lightweight flywheel, a lightweight or lightweight underdriven set of STILLEN Performance Pulleys will make the car generally feel more lively and responsive and quicker to both gain or drop revs.Underdrive pulleys increase engine output by reducing the draw of the engine’s accessories by slowing them down and reducing the horsepower (HP) they use.
Do pulleys reduce torque?
Pulleys are simple machines that can change the direction of force, making it much simpler for us to move objects. They also increase mechanical advantage when we use multiple pulleys together. This process decreases the amount of force required to lift something up.You can say that as the pulley mass increases, the acceleration of the object decreases.A pulley that is keyed to the machine shaft is called a fast pulley and runs at the same speed as that of the machine shaft. A loose pulley runs freely over the machine shaft and is incapable of transmitting any power.Pulleys of Different or Same Size If two pulleys of the same size are connected by a belt, as one turns, the second one will turn at the same speed with the same power available at the shaft. If a smaller pulley turns a larger one, the larger one will turn slower, but with more power available at the shaft.Pulleys are often modelled as smooth in mechanics. This means that there is no friction on the pulley.
Do bigger pulleys increase speed?
Put simply: To speed up a driven pulley (and achieve less torque) it should be smaller than the drive pulley. To slow down a driven pulley (and achieve more torque) it should be larger than the drive pulley. The bigger your driven pulley (vs the driver), the slower it will turn but the more torque it will produce.Community Answer In a pulley system, the smallest pulley usually turns fastest because it requires more revolutions to navigate the same length of the belt.It is proportional. To 32 tooth would be half the torque of the 16 tooth. Even the 20T is going to be losing 25% torque over the 16T. The larger pulleys can go faster, so at some speed it might be close to the same torque (steppers drop torque as they speed up).
When to change engine pulleys?
An idler pulley is expected to wear over time, and eventually the pulley will fail. Replacement intervals for idler pulleys vary, but are usually within the 50,000 to 100,000 mile range. Replacement often coincides with expected serpentine/accessory belt replacement periods. Replacing an idler pulley costs $151 to $320 for parts and labor. Your repair bill might be higher depending on how many idler pulleys your vehicle has and if your mechanic suggests changing all of them at once. You might also want to replace the serpentine belt at the same time, which adds to the cost.