Getting a performance pulley installed to your car will immediately give you a mechanical advantage. Although this component may be considered as one of the more popular upgrades you could do to reduce load and put more power on the ground, there are a few things you should consider before actually getting one. Here are a few tips to help you get the right performance pulley:
Less weight, less force
Less weight means less force is necessary to turn the performance pulley. Lightweight billet aluminum is the most common metal used in making performance pulleys. The lighter a pulley is, the more it will allow your engine to climb smoothly into its power brand. It also gives you additional horsepower.
Bear in mind that larger pulleys add weight on the accessory shaft, which actually decreases horsepower (something you should try to avoid). On the other hand, lightweight pulleys decrease the drag on pulley shafts, thereby increasing horsepower. This should be the main reason why you decided to have pulleys installed in the first place.
Full function, full ease of installation
Performance pulleys reduce power to the accessory but do not reduce too much that the accessory loses full functionality. The right pulley your car needs is one that is tuned to have functioning accessories while gaining a complete increase in power to the rear wheels. It should also be easy to install, only requiring the release of tension of the accessory belt and the removal of the accessory pulleys with a suitable puller.
The performance pulley is installed to simply prevent the accessories from being driven too hard at high RPMs. Remember that a damaged accessory can lead to further damage in your car's engine. Also, the pulley's revolutions per minute decreases when the diameter of an accessory pulley increases, making this cut down on the parasitic drag of your component's demands.
Other things to consider
Although most performance pulleys may be similar in looks, they vary in style and finish. Aside from all the features already mentioned, a performance pulley made of billet aluminum gives a off a silvery finish to match what's under your car's hood. Different performance pulleys are designed for different cars, so you should know your car's specific year, model, and make before making a purchase. Performance pulleys can be quite expensive since their prices range from $100 to $500.