Originally Posted by turbolover
Or at best you gain power and economy, at worst its a waste of time...
For the most part, NA, that is a safe way of looking at it (unless you cut into a water jacket or something, measure first), but it's nowhere near that simple on a turbo setup. I _still_ don't have hard numbers here (I think I promised AB that I would try to get them years ago... oh well, life gets in the way sometimes). It messes with the energy available in the exhaust to drive the turbine.