stark6

my $0.02, be VERY carfull with a bost controller, the tendancy is to turn them up to high without proper support( bigger fuel pump, injecters, rails; and new managment (reflashed ecu, AFC, something like that) ). If there is not enough fuel the motor will run lean and you will destroy it. Also, if its a manual boost controller they tend to start to leak after a while, and that can lead to boost spikes.

If you manage to keep your motor together then you run into several other challenges. The turbo is not designed to run at those higher boost levels, so it will be out of its efficency range ( not really a problem, but it will make the air it compresses hotter, meanig you will either need a bigger intercooler, or you will begin to knock). After that you run into the problem that to meet emissions a lot of the cars have a cat in the uppipe before the turbo. These cat's are designed to run at a specific temprature, so if you do something that pumps up the EGT's then you run the risk of melting the cat and sucking parts of it into the turbine (which leads to one of the best first motor mods on these cars, a high flow uppipe ( no cat sometimes means illigal, but ohh well ) ).

Don't let this scare you away from the new turbo sport sedans, they are amazing cars, just don't get swept away by the fuss everyone is making about these cars. Most people don't realize that these cars are actually quite fast out of the box. Try learning how to drive one (no, not just in a straight line) check out autocross.com and go race it some, it will be a real eye-opener when you get your ass handed to you by an old VW rabbit. Take a driving school, I'd bet the instructor can beat you by > 5 seconds 60 second course. There is a ton to learn about car controll.

To recap:
1. by turbo sport sedan
2. learn to drive it ( SCCA, autocross, track days)
3. make it faster :
a. tires
b. struts
c. uppipe
d. get on a fourm and look around!