It all about controlling the boost. With a JRSC, it provides linear boost. That why the torque curve is similar to a NA engine. With a turbo, you start building boost much earlier, that's where the massive amount of torque comes from.
With a boost controller that does RPM based boost, you can have a very mild torque curve, just like a supercharger.
A turbo is still definitely not for the ATX owner that isn't prepared to replace theirs if/when it blows. I'm taking every precaution that I can with my ATX. (Boost controller, synthetic ATX fluid, tranny cooler, etc.)
Here's the compressor maps that I promised...
TE04H-13C11 with an 85% VETE04H-13C11 with an 100% VETE04H-13C11 with an 85% VE showing all possible PR'sThe first pic shows two boost levels (7.35psi and 10.29psi). It is with a 85% VE. This is what you would see with a stock Zetec.
The second shows two boost levels with a 100% VE. This is what you would see with a FRPP head, intake, and cams.
The last pic shows all boost levels with a 85% VE. It also has approximate horsepower values across the bottom.
You can see that with a stock Zetec, at 6500rpms, you are on the extrememe edge of the map. This means a whole lot of hot air. On the plus side, this turbo is going to start building boost very early. The boost threshold is right around 1500rpms.
HTH,
BP
Thanks Hector! 
Besides, I've had two of those big, safe, Grand Marquis before when my children were little. I like a RWD V-8 land yacht - especially now that comfort is getting more important.
. I'd keep an eye out for that kind of stuff when you do put that turbo kit together Striker. Keep us posted! This is the most exciting thing to happen to the ZP area in months!!! 