d-vide

Hi people i have just removed my dump valve as i wanted to see if i could get the chatter, i have got a spare TD05 turbo and a spare MAF sensor just in case as some people say its ok and some dont, I am running a prova ecu at 1.2 bar and have a HKS mushroom filter + STI top mount intercooler.
I thought if you removed the dump valve then it would not dump and go PPPPHHHHHSSSSSHHHHH but mine still does it sounds like i havnt removed it , is this normal ?