I am currently running a HKS SSQV BOV on my car. Ever since i got the car running last year I would hear a flutter from underneath the hood. At that point the car was an automatic so didnt really think anything of it. I swapped the car to a 5 speed and removed the HVAC controls, all of the A/C and i lost the heater box as well....now i can hear the turbo very well now hence the fire wall is the only thing seperating me and the turbo....when i shift from 1st to 2nd i don't get a solid psssshh sound....ill hear it slightly but i hear a lot of what i would call "fluttering" type of noise, from the compressor side....Is this fluter noise that im hearing a "Compressor Surge" . I have try a few ways to hook the vacuum line up, and the best was tee'd off the fpr vac line..Or is this a characteristc of the BOV....Im only running 9psi. Would this BOV be for a higher Boost application..My brother has the same BOV on his civic and sounds very pronounced "pssshhh" no fluttering...should i look into something else
thanks again for any help....
Also is does not matter if im in the throttle or just pulling away from a light..and everytime i shift
you have to adjust the bov. there's an adjustment screw in the middle of one side. see this
picture...
Yea thats compressor surge... Will eventually cause the turbo to fail. Just get a better BOV.
http://www.cardomain.com/ride/2090440
Nitrous Nate wrote:Yea thats compressor surge... Will eventually cause the turbo to fail. Just get a better BOV.
Just get a better BOV? Are you serious?
SSQV > 98% of BOVs.
AutoFreak57 wrote:you have to adjust the bov. there's an adjustment screw in the middle of one side. see this picture...
The BOV i have does not have an adjustment on it....
I know my rfl will chatter unless I get up to about 9psi then it will blow off. Is this the same issue?
~Boost. Its what's for dinner!~
It sounds more like the characteristics of the blow off valve...
Compressor Surge is the action of air pressure going in reverse back to your compressor outlet and causing your compressor wheel to go in the opposite operational rotating direction. If it's fluttering, it's probably releaving the little air pressure that is in there.
But this is all diagnostics online...if we were there, it would be easier to pin-point.
that is how HKS BOV's work, I have one too, they will not leak under extreme boost conditions, and they blow off really hard. The rfl is known to leak but will be open way more often and be easier on the turbo charger.
HP Tuners | Garrett T3/T04B | 2.5" Charge Pipes | 2.5" Downpipe | 650 Injectors | HO Manifold | Addco front/rear | Motor Mounts | HKS SSQV | Spec stage 3 | AEM UEGO Wideband | Team Green LSD | FMIC | 2.3 cams | 2.3 oil pump swap | 280WHP | Now ECOTECED
Timothy Pietraallo wrote:I know my rfl will chatter unless I get up to about 9psi then it will blow off. Is this the same issue?
it will chatter just when i slowly accelerate and shift...if im WOT and let off it blows off hard and is good to go...will this BOV have different characteristics as per diffenent vehicle.
Abe Froman wrote:Are you sure you have an authentic HKS SSQV and not just some knockoff?
Its authentic....not from ebay....came in a HKS box....all the chinese letters and all...lol
ge_forcez22 wrote:that is how HKS BOV's work, I have one too, they will not leak under extreme boost conditions, and they blow off really hard. The rfl is known to leak but will be open way more often and be easier on the turbo charger.
so yours does flutter inbetween shifts while accelerating normally...just want to make sure i dont have any other issues or if i am barking up the wrong tree..
Quote:
so yours does flutter inbetween shifts while accelerating normally...just want to make sure i dont have any other issues or if i am barking up the wrong tree..
100% of the time. the design of the SSQV is to be tight and only open under extreme conditions (because of the pull style design). I love the flutter, you will hear people talk about reliablity issues.. the way I see it, I built my engine to last 40-50k, so the turbo will easily last that.. and if not, I think a GT##rs is in order
HP Tuners | Garrett T3/T04B | 2.5" Charge Pipes | 2.5" Downpipe | 650 Injectors | HO Manifold | Addco front/rear | Motor Mounts | HKS SSQV | Spec stage 3 | AEM UEGO Wideband | Team Green LSD | FMIC | 2.3 cams | 2.3 oil pump swap | 280WHP | Now ECOTECED
ge_forcez22 wrote:Quote:
so yours does flutter inbetween shifts while accelerating normally...just want to make sure i dont have any other issues or if i am barking up the wrong tree..
100% of the time. the design of the SSQV is to be tight and only open under extreme conditions (because of the pull style design). I love the flutter, you will hear people talk about reliablity issues.. the way I see it, I built my engine to last 40-50k, so the turbo will easily last that.. and if not, I think a GT##rs is in order
Now my brother has the same BOV on his civic and it has no fluttering noise inbetween shifts, just a solid psshh...even when just shift normally.....would that be because of the differnt engine characteristics and how there setup?.......we both have the same turbos as well
if it is the exact same valve, it should be the same. The work on pressure, and couldn't care less if they were on a 200 HP civic, or 1000hp civic, they only work on the pressure difference. I believe that screw in the back is not a "tightness" setting, but rather a screw to ensure that at idle the valve is 100% closed, if you loosen it off, you risk sucking dirt in under "out of boost" driving. But it may or may not blow off easier.
HP Tuners | Garrett T3/T04B | 2.5" Charge Pipes | 2.5" Downpipe | 650 Injectors | HO Manifold | Addco front/rear | Motor Mounts | HKS SSQV | Spec stage 3 | AEM UEGO Wideband | Team Green LSD | FMIC | 2.3 cams | 2.3 oil pump swap | 280WHP | Now ECOTECED
Would it make a difference if the charge pipes were a different size...smaller the charge pipe the more pressure it would build at a lower RPM...his charge pipes are 2.25 where as mine are 2.50
that may make a small difference, but nothing huge, you both had pull type BOV's? SSQV to be exact, not a "SSQV styl" from ebay
HP Tuners | Garrett T3/T04B | 2.5" Charge Pipes | 2.5" Downpipe | 650 Injectors | HO Manifold | Addco front/rear | Motor Mounts | HKS SSQV | Spec stage 3 | AEM UEGO Wideband | Team Green LSD | FMIC | 2.3 cams | 2.3 oil pump swap | 280WHP | Now ECOTECED
ge_forcez22 wrote:that may make a small difference, but nothing huge, you both had pull type BOV's? SSQV to be exact, not a "SSQV styl" from ebay
definatley not a SSQV style......not a knock off from ebay.....an authentic HKS SSQV BOV
it seems to run fine and i have no serious issues with anything else, so im just gonna run with it and see what happens................thanks for the help and info....
It shouldn't cause any compressor surge due to the dual valve setup the SSQV uses. It has the small valve that opens at light loads and makes a whistling sound when it opens, and the large valve that opens at heavy loads and has the PSSHHH sound. I'm not really sure why yours is causing surge. It should blow off cleanly even at light loads like your brothers' SSQV. Maybe you have too many vacuum lines tied into one source? Even my Greddy Type S opens at light loads. Maybe you're just talking about
very light loads and low rpms (light throttle and under 3000) where there's not enough pressure difference to open the valve. If that's the case, the very light surge/fluttering you hear isn't anything to worry about and won't hurt your turbo.
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450WHP Turbo Ecotec swap in the works...
PUSHROD SQUAD 