quote:I guess the same reason with an CAI right.. I haven't bought a CAI. Not sure if I will, not sure why I haven't. However, if I did, I'd by an Injen or AEM, probably the new Injen that's designed to fit the base vibe. Those manufacturers have extended marketing presence, and every now and again you'll see one on ebay. They also have published dyno charts for at least a Matrix, if not for a Vibe, which is effectively the same beast. A jetta and a Vibe are pretty different.I have had mixed luck with ebay, and am not about to put some unknown tweak on my Vibe's engine, because I value the car.The technology behind a CAI is pretty well documented, which is different from the ebay mystery module.A CAI alters the sound of the car, Vibers say it makes it louder. Manfacturers probably don't design them in to provide a compromise of power and sound to appeal to the biggest market share. If the module provides low cost 15 HP, there must be a side effect that prevented Toyota from including the minor tweak in the original design, maybe reduced efficiency, increased emissions, who knows?quote:There was a vibe on MO i think that had engine failure, which also had pulleys, which is why we flagged it...but i could be wrongThere was one on matrixvibe.net that was talked about in the genvibe thread I referenced. That owner had the unorthodox pulleys, but his story about when the engine died was either BS or he drove like he was trying to trash his engine. He had a Vibe GT.
http://www.matrixvibe.net/forums/viewtopic.php?t=3629. Don't know if that owner is a genvibe member or not. There was Bocaj77's problems, discussed at
http://forums.genvibe.com/zerothread?id=4806. I don't remember hearing of one on matrixowners.com.I am not in any way qualified to pass judgement on the unorthodox pulleys. I agree that there is potential for problems, but don't think there's enough evidence for red. Red = danger, yellow = caution. Probably at caution stage, semantics I guess. So, to sum up my opinionsOn fiery hill's question about the ebay item, I agree, stay away from it. On CAI, all reviews love it, Tested technology with lots of great pictures, results, installation walkthroughs, only hard part is deciding which color. On pulleys, too much unknown about risks, more data is needed.On supercharger, a lot of money, and the drop in MPG with requirement for premium fuel make it a mod I would love to have but can not afford.