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Crank pulleys, attached to the outside of the crankshaft, are the source of power for a car's accessories. The alternator, power steering, water pump, and air conditioner are all belt driven units, attached to the crank pulley, that use horsepower from an engine to provide their own services. Underdrive pulley systems increase an engine's horsepower by reducing the power required to drive the external engine accessories. By replacing factory pulleys with carefully resized units, the accessories are slowed enough so that their performance does not suffer, but just enough so that more horsepower is sent to the wheels and put to the ground. Where horsepower should be! Normally, underdrive pulleys will increase engine output by 8 to 15 horsepower, with even better power levels yielded from turbo models than seen in normally aspirated engines! This increase results in quarter-mile time improvements of .2 to .25 seconds, easily making this modification one of the best "bang for your buck" modifications for any sport compact car. Another great benefit in replacing factory pulleys with underdrive units is reduced weight. Factory units, also referred to as OEM, are generally constructed from steel or cast iron. Resized pulley systems are constructed of aircraft quality aluminum, making them extremely durable while at the same time much lighter than their steel counterparts. This increased weight reduction results in less rotating mass on the engine's crankshaft which drastically increases the engine's ability to rev up to speed faster. Better throttle response = big grin on a driver's face! Considering our Starlets that are already having superior power to weight ratio advantage.... What say you, bros? Increased weight reduction Increased horsepower Lower ET's & higher trap speeds

Hi, I am co-ordinating a grp purchase for lightened aluminium crank pulley for various models including Vios, Corolla G9, Altis, RAV 4, Lancer, Impreza, etc. Pls see this link for pics: http://photobucket.com/albums/y112/dfcp2000/ As various makes are involved, the savings are quite substantial - we need at least 5 of each make to enjoy the price of S$180 w/install (installation in proper workshop) or S$160 cash&carry. Please note that this crank pulley is pecision machined aluminium (made in Taiwan) that is 50% the weight of the orig. pulley. These pulleys belong to the same brands as those supplied to local workshops. Pls indicate yr participation below: Nick / Contact / Model 1) 2) 3) 4) 5) Please note that this is a one-time bulk buy as I am only helping myself and my friends, so that we can all benefit. Thanks.

I noticed that my power steering pulley is really dirty .. the area around it and the inner diameter of the pulley. Question I have here is, does these dirty accumulated over time, cause unbalanced pulley rotation ? And will cleaning it help ? Anyway, since I was waiting in the carpark, I took some cloth and wipe the area clean .. Also, there're other pulleys down below that I can't access, so I don't really know if they're as dirty .. but from the look of it, the PS steering is really dirty ! Just curious ....