if you are pushing high boost its a bad thing to do away with dv as you could smash fins from back pressure :?
Been told this is bolloc*s & i have to agree, i've had my car with no d/v running 1.5 bar for nearly a year with no probs 
If it's the ceramic turbo's that some skylines run , yes it can be a problem.
It's just a gimmick from tuners to sell d/v 's 
have to disagree pal owned gt turbo,s for 12 years plus, and never had a turbo blow up or shatter a impellor blade BUT they do wear a lot faster than if you were running a dump valve . chatter is the compressed air being force fed the wrong way through blades thus causing it to stall hence the chatter (chopped up air exiting wrong way from turbo)
do you not think this will cause excessive load and also significant wear on the shaft

?? :shock: :shock: :shock: :roll:
i also run a stage 3 cossy @31 psi on a t34 with no dump valve (blanked off) as i prefer the chatter to a dump valve
and have already had two turbo,s in last 9months due to this (both times sloppy shaft)
car is maintained a1 no expense spared so is not an issue
also lost count on how many turbo,s have gone through on my gtt (t3) as i run no dump valve on that runs @26psi
you may just be lucky but i disagree on your statement mate
oh i also build turbo,s for a living before im shot down in flames lol :wink: