will this be damaging any thing any time soon

 

You just run the risk of compressor surge, I'd say it's not a very good idea

 

Yes, you can damage it very soon.

 

how and what are you running no bov on?

 

2 words: compressor surge

after radical throttle closing, the pressure " wave " will come back and hit the compressor wheel, which is not really something you want to happen

I even read somewhere that it can make your compressor wheel spin backward... ouch...

 

Unless you're running a lot of boost it will not cause damage. Keep in mind early turbo engines like my old 12AT never even had a BOV, and the turbos lasted for many years (mine blew an oil seal at age 16). The factory installs a BOV to eliminate the noise of compressor surge.

 

NZ, how much boost is a lot?

 

well my car had no bov when i got it, previous owner said he ran ~12 psi. it smoked oil like a bitch. at least the noise was cool tho

 

Depends entirely on the turbo, and would vary considerably.