The Quick Answer: yes you will need a shorter belt
The Truth: It depends on how MUCH smaller the new pulley is.... assuming it is a serpentine-style belt (aka unibelt), there will be a spring loaded tentioner, which will take up a certain amount of slack, but not more than a few cm...
Chat with our AI personalities
Timing is done by Engine computer with imfo from cam and crank sensor . It is not adjustable. If you are replacing timing belt, a Gates timing belt comes with detailed instructions of belt and pulley timing marks. New belt has marks on it that correspond with cam shaft pulleys and crank pulley.
In relation to the 10 cm pulley a 5 cm pulley has half the circumference thus will rotate on the same line or belt twice as often. circumference = 2 x pi x radius or pi x diameter, when comparing 2 circumferences the value of pi is immaterial. Thus 10cm/5cm = 2
A pulley is just a wheel with a groove to hold a belt ,rope or chain. Your car likely has pulleys to run the radiator fan , the water pump , the air conditioner and the power steering. Elevators have a pulley. Your furnace probably has a pulley driven fan or pump. Movie projectors and video tape players have pulleys. Bicycles has a pulley to allow the pedal crank shaft to turn the drive wheel.
a pulley that Archimedes made
The answer is: L = pi x (D + d)/2 + 2 x ( C x Cos(a) + a x (D-d)/2) where a = arcsin(D-d)/(2 x C) in radians. Where C is the center distance, D is the large pulley diameter, and d is the small pulley diameter.