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Old 03-31-2009, 03:53 PM   #1
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Default Compressor surge

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.
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Old 03-31-2009, 04:37 PM   #2
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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.
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Old 03-31-2009, 04:46 PM   #3
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do you have compressor surge or is your BOV fluttering?
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Old 04-01-2009, 01:12 AM   #4
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Originally Posted by Braineack View Post
do you have compressor surge or is your BOV fluttering?
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.
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Old 04-01-2009, 09:45 AM   #5
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begi diverter / bov > *
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Old 04-11-2009, 08:58 PM   #6
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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....
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Old 04-11-2009, 09:03 PM   #7
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Quote:
Originally Posted by DXO View Post
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....

You getting correct vacuum?

How many pounds of boost are you running?

Also, where's the BOV located?
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Old 04-11-2009, 09:14 PM   #8
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You getting correct vacuum?

How many pounds of boost are you running?

Also, where's the BOV located?

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.
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Old 04-11-2009, 09:22 PM   #9
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Quote:
Originally Posted by DXO View Post
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....
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.
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Old 04-11-2009, 09:31 PM   #10
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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...
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Old 04-11-2009, 10:29 PM   #11
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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.
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Old 04-11-2009, 10:42 PM   #12
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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
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Old 04-13-2009, 02:46 PM   #13
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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.
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Old 04-13-2009, 04:26 PM   #14
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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.
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Old 04-13-2009, 06:01 PM   #15
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I installed the SSQV on my turbo build and so far no compressor surge. Works flawlessly for me.
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