I've recently put a evo3 big 16g turbo on my car has 3" exaust from turbo, now when i first changed it you could here the turbo spooling or ringing at round 2500rpm to 3500 rpm witrh foot 1/3 of the way down on accelerator sounded mean (not boosting it), now it dosent make that sound anymore but boost press hasnt droppd but acceleration and power has, i had to put standard exaust back on for noise test and that stopped the turbo sound but have put the 3 inch back on and the whining/ringing sound of the turbo hasnt come back, the lifters have just started ticking and seems to be leaking a bit of oil from oil return turbo side not sump side, could this be the reason??