Under Drive Pulley ?

[awwyea]

Do I need to get a shorter serpentine belt when I replace my factory pulley's with the under drive pulley set or can the tensioner pulley be adjusted to compensate for the dimensional changes of the pulleys?

 

[JonJon]

Used the stock belt but that started to squeak (4 years old). Bought a new one, works great.

Same size.

 

[awwyea]

How can that be? Aren't these pulley's supposed to be smaller in diameter?

 

[JonJon]

The ratio's change or something, so 1 spins faster, 1 spins slower or something like that.

 

[inferno9898]

some are smaller, some are bigger...and the tensioner makes up for any difference

 

[awwyea]

Which is better, the steel or aluminum? What brand would you recommend?

 

[stangman]

some are smaller, some are bigger...and the tensioner makes up for any difference

exactly


and you can't go wrong with steeda. i used mac on my last car, with good results as well

 

[awwyea]

Do I need a timing adjuster if I install the new pulleys? I have my timing advanced already using the Autologic chip.

 

[stangman]

Do I need a timing adjuster if I install the new pulleys? I have my timing advanced already using the Autologic chip.

nope