DXO

iTrader: (2)

My car is up and running fairly well ATM. The only problem I am having is compressor surge when I let off the throttle fast. I have a HKS BOV and it seems to be functioning as it should. The surge only lasts a second or so then you only hear the BOV, so I am thinking it is the BOV not releasing pressure soon enough. I have been trying to get a good video of it to let someone hear but I have been unable to get one.

BOV source is nipple on top of the TB and WG source is off the IC pipes pre IC.

Any ideas would be great.

skidude

iTrader: (3)

I was having that problem until I took my BOV apart and cleaned it all up. Mine was sticking closed. Once it would break the seal it would open freely.

Braineack

iTrader: (62)

do you have compressor surge or is your BOV fluttering?

DXO

iTrader: (2)

Both, there is compressor surge before the BOV is able to open.
And I do know what surge sounds like. I ran the Greddy kit with no BOV for awhile. I'll check what skidude said and see if that helps any.

hustler

iTrader: (6)

begi diverter / bov > *

DXO

iTrader: (2)

I know this is kind of old but I have continued to check into this. I have checked the BOV with a compressor to see if it sticks any. I am guessing it simply can't vent enough air to avoid compressor surge even though it worked fine for my Greddy turbo.

I would think a SSQ BOV would be good enough for such small turbos that most of us are running, but I guess not.

Maybe it's just because mine is old....

gompers

iTrader: (4)

You getting correct vacuum?

How many pounds of boost are you running?

Also, where's the BOV located?

DXO

iTrader: (2)

18-21 VAC. BOV is on the run up from the intercooler to the TB. ATM I am only running 7 psi, the same I was running with my Greddy turbo, till I solve this surge issue.

omaharam

iTrader: (2)

Ran a SSQ on a DSM w/ a 16g at 25+psi for 8 years without ever taking it off the pipe and it was good enough for that. It's not an adequacy problem if it's functioning correctly.

DXO

iTrader: (2)

Well I am asking around to see if I can find another to put on for a little bit to see if it is the valve or if the problem is else where...

Gotpsi?

iTrader: (5)

I had that bov and had the same problem no matter what I did I went with the CX racing greddy knock off and it works far better.

sprsta

just took mine for its first boosted test drive i also am getting abit of serge before the bov opens you can really notice it when at a standstill and opening and closing the throttle. i have checked the bov and regreased it but i think the spring in it is too hard even with it adjusted right out it is a sard R2D2 guess ill give another one a go and see if i helps

96rdstr

iTrader: (4)

I had an older HKS SSQV. It would only open under higher pressures. I got a new SSQV from HKS, and it is now working properly. I still get a slight surge(turkey gobbling through the intake). Honestly, I don't worry about it at all. A little surge never hurt anything.

Orion ZyGarian

I'm tempted to say that it does that on purpose. It along with the RFL and Type S (among others) are BOVs that are designed to put the noise they make over functionality IMO. I doubt it's enough to cause much damage if at all, especially at a boost level that low..in fact, under 10 psi one could say any BOV/BPV is unnecessary, especially with a good strong turbo like a 16G.

At that level, I doubt the HKS is loose enough anyways. I think they (and most other ones) are meant for more pressure, so it acts like it isnt even there under X amount of pressure.

Qckslvr

iTrader: (6)

I installed the SSQV on my turbo build and so far no compressor surge. Works flawlessly for me.