i dont know alot about engines but my friend told me to get some light weight pullys i was just wondering what exactly they do and what i would gain from them?
Let me start out by saying, I do fully understand the hesitation around here on these, but would hate for a performance part that in most markets is considered by far one of the best modifications for the money, I'd hate to see it completely written off due to another product. The last thing I would be here doing is trying to sell anyone parts they do not need or would cause them harm. Those who have shopped with us in the past I'd hope would know this from experiencing our service, but we are here to convince the rest of you as wellSome engines respond well to lightweight pulleys, because the pulley does not act as a harmonic balancer. Subarus for example have no issues with lightweight pulleys, but their engines are also self balancing by the nature of it being a boxer setup. The fact there are 2 (maybe 3?) people who have blown up their motors with very small mod lists, and within a short time of installing a lightweight pulley? Yeah. I'd pass too.
Also, how exactly is your product different? Lightweight pulleys are usually just a chunk of aluminum, tossed on a lathe and made to shape. 6061 as a product from metal suppliers is going to be pretty darn uniform, and as long as the lathe is in decent repair, any aluminum lightweight pulley is going to be damn near identical to the next one. Unless your pulley has something inherent in it for harmonic balancing, like a 2 piece construction, I doubt yours is any more safe or quality than the next piece.
EDIT: just read the site, and yeah. Generic aluminum pulley set. You can argue that maybe unorthodox racing has better run out/concentricity on their components, which leads to a better balanced pulley, but when the motor blows and hyundai points at that shiny aluminum pulley and says that caused it and you're warranty is denied, 15+ years of on street experience isn't going to pay for the replacement motor.