Originally posted by VTECseoul
the only problem is that sometimes there isn't enuff juice in the alternator to keep a constant flow of electricity, so sometimes the motor stutters. if you plan on running a stereo w/ even 1 amp, don't even consider pulleys.
This is a severe exaggeration. I have had UR's full street pulley set on my car for years now since 1999 and have subsequently put on more than 60,000 miles on the car with cell phone plugged in, indiglo gauges, 250 watt alpine amp, JL 12W6, ac blasting with the headlights on: NO PROBLEMS. I am even using HIDS for the last 5,000 miles with NO PROBLEMS.
I have never changed my alternator, I replaced my battery at 7 years of age (stock one) and replaced it with another Delco.
The pullies may cause probs on large monstrous systems, but then again cars with that kind of system aren't going anywhere quick anyway and would not need/benefit from pullies. The pullies will exacerbate probs on cars with poorly functioning/wired electrical systems.
Are they worth it? sure after you have i/h/e. the car will rev up quicker. A big plus i have experience with my pullies is definitely gas mileage improvement. I will regularly get 32 mpg on the highway despite having an automatic F22 vtec.
Will there be long term engine problems. Maybe. I really don't know who to believe about the crankshaft harmonic balancer thing (prob with crank pulley (UR) only), but I'll let you know when I have my motor torn down for a complete rebuild in a coupla years. So far no problems. If I owned a V6, I would not do an unbalanced pulley just on the simple principle that V6's have lousy properties requiring extensive work to smooth them out (why Straight 6's on bimmers are soooooooooo smoothe).
noel