Which engine do you have? I've seen some stuff in the RAV4 forums where they turbo'd the 2.4L engine (2AZ-FE) http://rav4world.com/forums/viewtopic.php?t=22084 But I know nothing about that stuff, nor whether that would translate to the Vibe very well.
2009 2.4L Automatic with Preferred Package and Sun and Sound package May 2010 MOTM March 2011 VOTM