BAD BAD BAD. Don't do it. I blew a turbo from not having a BOV fitted running only 11psi. Get a steel shaft turbo if you want that noise.
The turbo is flowing a LOT of air under boost and as soon as you release throttle the throttbe body closes while the turbo is still spinning causing it to reach very high boost levels between the turbo and throttle body.
If you want to see for yourself how bad it is just hook your boost gauge up before the throttle body and watch the needle go off the scale when you take your foot off the gas.
