geez, I hate to have to say it this way, but Demon, you are right, though not for the reasons you think.
TT's are used to decrease turbo lag, but sacrifice high end power. I know quite a few people that have switched from TT to single.
This is a shortsighted statement, while it may be true in a given particular application, it depends completely on the designers intent, and the particular components used, and the overall setup of the system.
The 2.5L as used in the Contour, and especially in the SVT, is in a position where, if properly designed, either a twin turbo system or a single turbo system can perform very well in pretty much all areas.
The problem w/ a twin turbo on a Contour, is that it would be extrememly difficult, though not necesarily impossible to package. Where a single turbo can be packaged relativley easy (though it won't be a walk in the park either)
Jac,
I hate to say this, but your buddy will probably end up asking you for quite a bit more money because of the vast amount of time and effort it will take to fit a twin turbo. (this of course is assuming your buddy is knowledgable and experienced enough to do it in the first place)
hunymobile,
Please, think before you speak. A single turbo is more than capable of working quite well. Heck I know of single turbo Mustangs in the 8s and even faster. And FYI, that pic is of a turbo duratech stuffed into a Focus wagon for Ford Racing.
