Originally Posted by rogue13_13
Pulleys will free up horsepower by increasing the leverage(smaller pulley) on the crank pulley.... and or larger pulleys on the accessories will do the same.
(another GREAT advantage is that a good crank pulley will be lighter than stock also)
warning----ANYTIME you use pulleys to increase horsepower you are lowering the speed at which your accessories pulleys spin, this could affect your enjoyment of daily driving...... for example, your alternator may have trouble keeping up under loads, stereo, highbeams ect.. you could also run into problems with your A/C not performing as well as stock.... stuff like that
Great, thanks for posting the
theory used to sell pulleys right after someone posted
fact to the contrary.
Originally Posted by shivers
Two friends each with 2000 base model Preludes. Both had AEM CAI, stock header, exhaust, and a VAFC. One had AEM pullies and the other didn't, that was the only difference in the cars. They dynoed back to back. Car 1 (no pullies) made 174.6whp and 140wtq. Car 2 (with pullies) made 174.8whp and 141wtq.
The peak numbers are more or less identical. The difference could have been due to the straps on the dyno, tire pressure, etc. I wish I still had the dyno plots ... the curves were identical. In other words, pullies don't do anything. Others may have a different opinion, but I've seen the evidence first hand.
That's right folks, pullies don't do jack.