existanzrx7

iTrader: (8)

Hey guys I was wondering if any body out there using a Pettit power pulley with Gready or Unorthodox accessory pulleys? If you guys do what’s the number for the belts that you used and also the brand please. One other thing what power pulley do you guys like that you actually feel power out of. Thanks

impactwrench

Only a dyno will show HP gain from a pulley change. You will not FEEL it

existanzrx7

iTrader: (8)

any body try it let me know

CantGoStraight

Not sure how to put this.....if you have 300 hp at the rear wheels when you put on power pullies, under drive pullies what ever you want to call them you will still have 300 hp at the rear wheels. All these pullies do is reduce the impact they play on the hp you already have.....kind of like your AC when you turn it on it doesn't reduce your hp it uses it, just by turning your ac on or off doesn't change your hp. Hope this makes sense as people claim there is hp gains to be had by using these pullies and it just isn't so.

Mahjik

iTrader: (1)

I have the Pettit Power Pully with the Greddy pullies. Basically, you need to take a string and trace where your belt needs to go. After that, measure the length of the string and find a 4 or 5 rib belt that is the closest to your measurement.

I would also recommend you lower the alternator all the way down before you do your measurement (for the alt/wp belt). Then only get a belt that is a little larger.

IRPerformance

iTrader: (41)

In my experience it underdrives the alternator too much and it is a pain to find the right size bellt. I had to use a 4 rib belt. Just run one of the other. I would just run the Greddy pullies.