=because there are cool=
Coolers are necessary after a turbo-charge to help in the smooth running of the engine. The main purpose of the coolers is to cool down the engine after using a turbo charger.
Some turbo cars will be fitted with a turbo timer, which keeps the engine running for a specified time after the ignition is turned off. This allows the turbo to cool down before the engine shuts off, which prevents potential damage to the turbo.
A turbo timer is always a safe bet on any turbo engine. It lets the engine idle after you remove the key and lock the doors. Doing this lets the engine oil cool the bearings in the turbo which will extend the live of the turbo. Also keeping your oil changed like is outlined in your owners manuel will help also.
YES! Especially if you have been pushing it hard. Turbo's need to 'cool off' after being used, and is very important if they have been used hard. Oil from the engine will cool the turbo off after a few minutes. Sophisticated cars and cars with twin turbos usually have timers built in to the ignition system which will run the engine for 2-4 minutes after you turn the key off, specifically to cool the turbo(s). You should always idle a car with a turbo before you turn the engine off - longer period of time if it was racing.
add Turbo, Cool air intake, supercharger,etc...
How do you blow a engine turbo.
No, the turbo is powered by the exhaust and uses no engine power.
a radiator is used to cool down the engine using a liquid, whereas an intercooler is used to cool the air going to the engine or cooling the air comming from a turbo. What that does is that there will be more air particles in a defined volume of space if the air is cold, compared to hot air in the same volume of space. This is due to air contracting in cold temperatures. The result is more air going to the engine and therefore more generating more power.
A good practice is to let your engine idle for a few minutes after starting so the oil pressure can build and lube all the internal parts of the engine. A vehicle with turbo should be idled before shutting off to let the turbo cool down.
yes
a non-turbo engine will not hold up to the turbos you will have to put in hardened internals