I have flutter, but not really by choice. As soon as i hit boost, my standard BOV opens. Its rooted. So i just made up a plate to block the BOV off. I prefer flutter than the annoying sound of a BOV anyday.
MRdeanos, im no expert but depending on the turbo you have, over time is can cause damage to you turbo. As not having a BOV is causing the trubo the spin the opposite way when you back off the gas.
Can anyone tell me which turbo is more flutter friendly lol? is it roller bearing? Sorry im a noob...
EDIT: Funky monkey, what do you mean by a metal pipe between the turbo and the turbo?