hi, does anyone installed the underdrive Racing pulley and got oil leak when it is high REV? and wut brand you guys using? Thanks

 

Some people say NOT to do it.
Some people say TO do it.
Some people say to go with a dampened pulley.
Most agree the problem is with aluminum unsleeved pulleys.
Unorthodox Racing pulleys have a steel sleeve.

Decide for yourself if they are worth the risk of a rebuilt. Good luck my friend.

 

I have a Unorthodox Racing pulley on my 06 RevUp. No issues since the install 15k miles ago.

 

^^did you notice any gains

 

It's a questionable debate as for gains and being noticeable. Everyone has their own opinion.
I feel that a lightweight pulleys do not increase the amount of torque or
HP developed by the engine. They simply reduce the amount of rotating mass that the Engine must accelerate. Therefore, the faster the engine RPM is increasing, the greater the benefit will be from reduced pulley mass.

 

The under drive pulley dates back 6 years. Lots of informative threads here for those willing to look.

 

Im aware of the debates and what they do I was just curious of his personal experience

 

thanks alot for the info guys...