Originally Posted by XR4Timan
You gotta be silly to run a Cossie w/o a dump valve, that's why Ford fit them standard - and Fords are cheap ass bastards!
If you have no dump valve, it will send air to your turbo to stall the blades. Also the trapped boost will try to escape through the easiest exit out, so it can blow your clamps off. Finally, it will slow down the turbo, since it's trying to stall the blades, whereas a dump valve will keep the compressor wheel running at speed, so there will be less delay in speeding back up.
Plus the sound of an atmospheric dump sounds great!! Tells everyone 'F@CK @FF I got a turbo, you slow-ass b!tch!"
Not really
Ford fitted them as standard, because do you think business men would want their car making chatter noises all the way down the motor way?
Remember they were a rich businessman's car to start with
(Sapphs)
However, you are right in principle, but it only applies to turbos T4 and bigger
