thanks, nice to know. Don't know much about these things but it looks from the pic in the link that this vtg is actuated by a vacuum unit. Is this the case? Do the I30's have this or and electronic version activated by sensors? Would this still work at high speed when there is enough exhaust gases? I would assume that as it designed to do compensate for lag at low rpm, it isn't meant to allow for the power drain of the AC hence like most large modern cars the AC unit is switched of through throttle position sensors to ensure all power is directed where and when it is needed most. Don't get me wrong, I'm all for getting the most out of my little rocket and I understand the the knowledge being shared, but I not sure this is the best thing to be tinkering with.