teg_95

can someone explain to me what this is and how to get rid of it. and does this sound like a sign. im only boosting 4 pounds right now and my BOV opens at three. so would that cause it to flutter?

TiAL

sounds more like the turbo is going into surge, the bov has nothing to do with it

teg_95

how do you fix/ prevent. and i heard that if the bov flutters that surge

dephtone

What kind of BOV do you have?

I know personally I have a Greddy BOV and when I first put it on my car I had terrible compressor surge because the BOV was too tight and not allowing the air from the intake tube to be released once the throttle plate was closed. I had to loosen up the little screw and now it blows off without any issues and no compressor surge.

Compressor surge sounds exactly like you say, it's a flutter sound, it may sound good but it can be very hard on a turbo. Compressor surge happens when the air from the intake side of the piping has no where to go because the throttle plate is closed so it goes back through the piping and goes into the compressor housing actually spinning the wheel backwards which is NOT good. The flutter sound is the air pushing the compressor fins backwards.

ScorpionT

Its not surge, and your BOV shouldnt open under 3psi like that. Is it making the noise when youre getting off the throttle or just holding it?

More than likely BOV flutter caused by inconsistent pressures on both sides of the throttle plate.

TiAL

which bov, which turbo, how much boost, and when is it doing it? low RPM full throttle?

teg_95

its just a no name brand BOV. got it from a friend just to put the kit on. its a t3/t4 and low rpm maybe 3000-3800rpm

b3st0fth3w0rst

my .02 i would definitely spend the extra money and get a better BOV, or wastegate; greedy, tial, etc. although cheap no name one work, i've seen more problems with them than top quality ones. no saying the expensive one don't go bad either. a bad BOV/wastegate can ruin your turbo costing you more money in the long run, so u might want to be careful.

teg_95

oh yea i am planning to get a better one. just have to wait for the money to be right.

dpetro1

fluttering at low psi is most likely not compressor surge. and from your other thread it looks like you arent tuned yet, so stop boosting! i know its tempting but even basemaps can be unsafe in boost

teg_95

yea. its goin tuesday

MadeInNewYork87

im having the same problem due to over tightening my (HKS)BOV. it was leaking so i tightened it little to see if it would help..