B33mEr
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Guna;449029 said:Despite all this negative issues about lighter pulleys I am still very curious la guys.I was talking to a certain reputable aftermarket shop guy that he has fixed it on hundreds of cars over the last 3 years with no major problems.He said he is aware of the risk if you put in the wrong ones but he almost swears by what he has.He mentioned of a particular brand called RUFF and that it would cost somewhere in the region of RM2,400 plus labour to change three though the kit comes in a set of fours.He was about to explain why only three when he had to put the phone down coz he was in the middle of something.I was also talking to some friends who drive some fast cars like Audi Quattros who don't seem to have a problem with the mod.The idea of deriving that much power from a simple and yet not so expensive mod is really tempting guys and I hope some super sifus here could give us the serious pros and cons.But for now,I think I'll hold the plans till I'm assured.
i think the other pulley is the alternator pulley which is a big No-No. It basically under-drives your alternator and will affect BMW's sensitive electrical system, so the aftermarket guy is right in not installing the alt pulley. I'm assuming that the set of four pulley also includes the lightened crank pulley.
http://www.ruff.tw/BMW/CP.html
http://www.ruff.tw/BMW/UP.html