Underdrive Pulley

[Marc Lublin]

Just wanted to know who is using them? HP increase? Any charging problems? Who's selling them?

Thanks

 

[Anthony - 98 GTS]

Mark,

Do a search - there was a good thread on this about 3-4 weeks ago which covered all your questions.

 

[Marc Lublin]

I searched and I don't seen anyone with actual HP #'s. Some say they do something for HP others say no. There's got to be more than 1 person who dyoned before and after.

 

[utahviper]

I posted a thread a couple of weeks ago that dealt with this topic. No one posted any HP gains but some posted that they didn't see any gains. I bought a 50% underdrive pulley from the gentleman who posted there and I will be dynoing my car sometime in the next couple of weeks to see if there is any gains. i will keep you posted.