The very first generation MINI Cooper S, created involving 2001 and 2006, is powered by a supercharger. The supercharger in the early Cooper S delivers extra oxygen to the motor and, for that reason, a lot more gas. This maximize in distribution of oxygen and gasoline to the Cooper S’s motor yields greater electric power output. Nevertheless, there is however more electrical power attaintable owing to MINI aftermarket parts like the lessened-sized supercharger pulleys.
Ordinarily, aftermarket pulleys come in three different variations – 15%, 17% and 19%. What do these percentages signify? They basically refer to the size change in between the aftermarket and stock pulley. For instance, a 15% pulley is 15% smaller sized than the a single that will come stock in the MINI. The more compact the pulley, the smaller the belt and, the smaller sized the belt, the more quickly the turbines in the supercharger spin. When the turbines spin speedier, far more oxygen is equipped to the motor and the motor yields a increased electric power output. What does this total to? Far more torque and horsepower.
In the R53 MINI Cooper S, expect to seize a attain of about 15 HP after installing a 15% pulley. (Try to remember, the percentage of the pulley does not correspond to the achieve in HP – this is just a coincidence.) With the 17% assume a 20 HP raise and, with the 19%, a 25 HP strengthen. All HP gains range centered on the issue of the MINI and formerly-added functionality elements.
When taking into consideration the price of an aftermarket pulley – $100 to $150 – and the amount of money of added HP acquired, it is a single of the most price tag-powerful upgrades in the R53 MINI aftermarket. MINI effectiveness components like bulky intercoolers and exhausts value all over a grand and don’t supply the HP boosts that effectiveness pulleys do. In essence, you get an more 15-25 HP with a two-pound pulley and a lesser HP attain with different efficiency components that are heavier and more expensive. This is why several lovers are swift to make an aftermarket pulley set up their initially MINI update.
But which pulley should you buy? The 15%, 17% or 19%?
By seeking at the HP gains manufactured by every pulley, it looks very best to go with the 19% for the highest HP obtain. The 19% pulley, nonetheless, isn’t really the most practical. The 19% delivers the most enhance, but also delivers the most use to the vehicle’s internals. The 19% is good for shorter circuit races or time trials when the 15% is excellent for stamina, long races and daily electricity cravings. Placing this into perspective, the 17% is a compromise amongst the two. It provides an raise in HP over the 15%, but will cause internals to put on a little bit more rapidly. In general, the 15% is the most advisable pulley for everyday motorists of the R53 MINI Cooper S wanting for a substantial electricity achieve.