HKS SSQV Fluttering, and low boost problems

[LegacyOfPhoenix]

I have an S14 SR myself, and when I just checked some pictures, I found that that my BOV vacuum line comes from the port farthest to the left under the TB.

Is that the one that I 'had' it on originally? And you don't have any compressor surge?

[LegacyOfPhoenix]

Some more information i've found while searing for answers. I'll post on here just because searching nico for answers on compressor surge stinks. Maybe it will help others searching.

Quote »

Why do I have surge (a woo woo woo woo sound) on my SSQV?

1. This is a result of the valve not pulling the valve open, while the turbo compressor is spinning. The air gets "stuck" in the system and slowly returns causing a repeating woo woo woo sound. 2. The HKS SSQV needs high air flow on the back of the valve and a strong vacuum source to pull the valve open. On some cars where the bov is positioned in an odd location, this may not be possible at part throttle. The turbo is creating lots of air, but little to no boost has reached the manifold due to a pressure loss across the IC. 3. You can re-locate the valve and/or get a stronger vacuum source to help combat this effect. You want a thick single line straight the manifold for a vacuum source, as short as possible. 4. Mild surge at little to no boost levels will not damage your turbo. 5. If you are worried about this noise, you may want to consider re-installing your original bypass valve in addition to the SSQV so that the air flow at part throttle can be released as intended. Otherwise, you may want to change to a push type blow off valve that will operate on less of a vacuum source.

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[Thoughtful_One]

Well, I haven't mounted my SSQV yet. I still have the stock BPV.

[Thoughtful_One]

Any luck with your problem?

[k00laid83]

hey guys i have to bring up an old post but i have an hks bov that i was using for my civic when it was turbo'd...well when it was in my car it was just surging and it never blew lol...i got tired of tinkering with it and just ended up taking it off and putting a stock dsm bov and it worked perfect! now the question i've torn this hks bov down a couple of times trying to figure out whats wrong with it when it was on my ef....well i still have this bov and i was thinking about using it with my blacktop and seeing that the op had trouble...i was wondering if there was a way to rebuild an hks bov? or is there anything i can do? any suggestions would help!!! ive been searching on here, yahoo, and google! any help would be appreciated!

[White Comet]

Any luck with your problem?

his turbo blew a few weeks ago. so its time for a new one

[jr_ss]

Alright, I was having the same issues and I just figured out how to run your vac source to the SSQV and have it blow off like it should... The flutter everyone, including myself was hearing, is indeed, the compressor surge everyone was talking about.

Here's how I solved my issue...

I had the wastegate vac source connected to one of the ports underneath the throttlebody itself. Now, how the SSQV works is off pressure differential and I had a hunch that it wasn't seeing enough or any at all, with my connection to vac source being right at the throttle body. So, I moved my boost gauge/controller line from my FPR and put it to the spot I had my SSQV hooked up too and moved the SSQV line to the FPR.

It now sees a big enough pressure differential to blow off like it should. I get a chirp/whoosh sound now instead of the Turkey call... I hope this helps some of you.

Glenn

[White Comet]

am i reading it correctly that u now have the ssqv hooked up solely to the fpr?

[jr_ss]

Well, with the limited number of vacuum ports on the S14 Sr intake manifold, that's the only option I have... I need to get a vacuum manifold to add more ports to hook up too... But for the time being, it'll work just fine.

[White Comet]

ok, i was just wondering. i have mine hooked up to the fpr (s13 sr20) and it seems to be fine

[jr_ss]

ok, i was just wondering. i have mine hooked up to the fpr (s13 sr20) and it seems to be fine

White Comet, I actually moved mine around again... On the S14 Sr there's 2 metal vac lines that run from the underside of the plenum to underneath the T/B. For some reason I had one of those lines hooked to my cold side charge pipe, so I plugged that and used the line I free'd up for the vac source for my SSQV. I wasn't sure if having the vac source split with the fuel FPR and BOV was a good idea, so I put my gauge and boost controller back on the T for the FPR.

One thing I have noticed, is the SR lacks multiple vac sources for adding other pieces of hardware, i.e. gauges, boost controllers and BOV's...

Just thought that I would share that with you, not saying the way you have it run is wrong, I just like the gauge and FPR together, better than the SSQV and FPR together. I would imagine the SSQV uses a large amount of vac to be operated and I'd rather not have that T'd in with the FPR.

[White Comet]

hmm, you make a good point. i'll have to see what i can work around

[k00laid83]

i was researching and i found out that you can change out the springs in the bov to make it actually blow....im going to try to see if that would help....and i guess it was never going to work because when i had that bov in my honda it was only on 5psi.... so i guess thats why it never blew out any surge....so im going to take it apart tomorrow!

[jr_ss]

You don't need to pull the SSQV part, unless you want to clean it... Like I said it's a pull type BOV, any amount of boost you throw at it will only make it seal tighter. Perhaps you are speaking of a different BOV?

[sleeks15]

I HAVE A SSQV FITTED ON MY 200SX S15,i was getting a awsome flutter sound low rpm....my turbo blew had no idea what happend.when i took the turbo off i found a piece of broom handle had been hitting my turbine,the owner b4 me would have put it in the hose to get the FLUTTER SOUND.

i installed a new jap spec turbo,and im gettin no flutter at all...i heard it is bad for ur turbo if u block the pipe..IS THERE A WAY I CAN GET MT SSQV TO FLUTTER WITH ONE OF THOSE INSERTS? THANX

[White Comet]

...i heard it is bad for ur turbo if u block the pipe..

block what pipe?

[cody180sx]

mine does this also and i think is on low boost (putting around) there isn't a lot of vacuum so the bov doesn't open are all the way, mine only does this once in awhile