V3 HKS SSQV Installed, but having a few issues

[NightRider97]

I've read through the hundreds of posts and even weeded through a few dumbass comments but I'm a bit confused as what to do if anything.
I just finished installing a ported EVO III exhaust manifold, FP Big T28 turbo (with the 17psi waste gate) and a ported EVO III O2 housing along with a new Denso O2 sensor. To support these mods I installed a Spearco large SMIC and custom made hard intercooler piping with (obviously) an V3 HKS SSQV (the limited edition black one if that clears it up any better). I got the SSQV used from a member here so there were no instructions. I plumbed the vacuum port to the intake manifold and I'm recirculating the BOV into my intake stream after my stock MAFS.

For the most part the car drives amazingly, it is noticeably faster than my friends 08 Mustang GT (he even admits it) and I haven't really noticed any stuttering or dying situations under high boost. The BOV makes the fluttering sound every SSQV I've ever heard makes, but it even does it under high boost situations and its got me wondering if its actually giving off compressor surge. I don't notice any stuttering though under high boost or any jerking from the motor at all, but it still makes the fluttering sound.
However when I do notice some stumbling is at very low boost say like 5-7psi climbing a hill. If I crest the hill and completely let out of the throttle to coast down to the bottom it will stutter a few times until the boost drops off and I hear no blow off from the BOV. First of all are either of these situations I've described compressor surge? And secondly is there something I can do to fix the low boost stutter problem?
If you need more info about my setup just let me know. And Mods please leave this thread here in the open forum and not stacked along with the compiled threads about SSQV's until I've resolved my issues.
Thanks in advance!

 

[doctor_shock10]

I've read through the hundreds of posts and even weeded through a few dumbass comments but I'm a bit confused as what to do if anything.
I just finished installing a ported EVO III exhaust manifold, FP Big T28 turbo (with the 17psi waste gate) and a ported EVO III O2 housing along with a new Denso O2 sensor. To support these mods I installed a Spearco large SMIC and custom made hard intercooler piping with (obviously) an V3 HKS SSQV (the limited edition black one if that clears it up any better). I got the SSQV used from a member here so there were no instructions. I plumbed the vacuum port to the intake manifold and I'm recirculating the BOV into my intake stream after my stock MAFS.

For the most part the car drives amazingly, it is noticeably faster than my friends 08 Mustang GT (he even admits it) and I haven't really noticed any stuttering or dying situations under high boost. The BOV makes the fluttering sound every SSQV I've ever heard makes, but it even does it under high boost situations and its got me wondering if its actually giving off compressor surge. I don't notice any stuttering though under high boost or any jerking from the motor at all, but it still makes the fluttering sound.
However when I do notice some stumbling is at very low boost say like 5-7psi climbing a hill. If I crest the hill and completely let out of the throttle to coast down to the bottom it will stutter a few times until the boost drops off and I hear no blow off from the BOV. First of all are either of these situations I've described compressor surge? And secondly is there something I can do to fix the low boost stutter problem?
If you need more info about my setup just let me know. And Mods please leave this thread here in the open forum and not stacked along with the compiled threads about SSQV's until I've resolved my issues.
Thanks in advance!

have you ever boost leak tested that BOV? maybe im reading wrong but it sounds like its leaking beside the(no noticeable stuttering)

 

[NightRider97]

I have not boost leak tested it yet, thats one thing I need to do. What makes you think its leaking from what I've said?

 

[knochgoon24]

I also noticed some stuttering when using the SSQV v2, but my car is an automatic. Light throttle lifts were annoying. Eventually, I switched to a speed density setup and the problem went away.

 

[jjrock5]

I have the original SSQV (with the screw in the rear) and I get low boost (<10 psi) flutter but never any "stutter", I dont think.

How do you describe the stutter? Why would switching to SD stop it?

 

[knochgoon24]

My car would actually stutter. Physically jerk a little bit. I switched to SD and started to vent the BOV. The problems disappeared completely.

I had a metal intake pipe and those don't have a tube that points away from the MAS, and I think that the recirculated BOV was blowing back towards the MAS a bit. With most of the other BOV styles, they don't flutter at all, so your MAS reads a pretty constant. But the fluttering from the SSQV may mess with the MAS reading when recirculated.

Some people have no problems with the SSQV. Others do. I had knock off type-s that I put on and the problem pretty much went away, so I know it was related to the BOV.

 

[jjrock5]

Hmm interesting. Which knock off Type S did you have?

I have the one that came with the Punishment Racing FMIC kit and I'm thinking of giving it a shot.

Did yours (knock off Type S) give off any whistling sound when it blew off recirculated? I saw on the NGR bov thread that "regular" ebay knockoff Type S's didn't do the signature "whistle" that the NGR and orginal Greddy Type S does.

 

[knochgoon24]

It was a POS one that I bought for $25 on eBay before I knew better. The quality was sub-par, but it did work. It didn't whistle, but it did whoosh. I never tried running it vented to see how it would sound. Then again, I don't think I'd trust it holding the boost I run now. The screw in the top stripped out twice on me.

 

[jjrock5]

Wow that is a POS. I may just skip on the one I have.

 

[knochgoon24]

The springs inside rusted, but cleaned up with sandpaper when I pulled it apart to clean. I spray painted the springs with some Rustoleum paint before putting it back together. The diaphragm was still in good shape, but definitely looked cheap.

My friend is now running it on his 90 Talon Tsi, but he beats the crap out of that car, so the BOV is the least of his worries.

 

[NightRider97]

I stopped at a tuning shop today and took the tech for a ride in my car. He told me the fluttering sound is coming out of my intake pipe but doesn't think its compressor surge. He thinks its just how that blow off valve functions with my car. He said he didn't notice any of the other tell tale signs of compressor surge such as a stalling out motor between shifts or the fluctuating boost gauge. I'm gonna keep my fingers crossed for now and hope he's right I guess. I'm building a boost leak tester at work and will do that this weekend.

 

[NightRider97]

Ok, I took the car on a 1400 mile round trip this weekend and I definitely need to do something about this BOV. I've pin pointed the problem to this, it blows off at every shift even at low boost (has the fluttering sound regardless) but does not blow off if you put the motor under hard load making the turbo pickup boost and let off the throttle without a shift. When it does this if you don't gently feather out of the throttle it will buck and sputter really bad. I know there are several of you running the SSQV so I'd like to hear how you guys solved issues similar to mine.

 

[jjrock5]

but does not blow off if you put the motor under hard load making the turbo pickup boost and let off the throttle without a shift.

Are you saying it doesn't FLUTTER at this point or it doesn't blow off AT ALL?

 

[NightRider97]

No blow off at all, not even the normal fluttering sound. It just jerks and stutters. I'm thinking this, what I'm trying to describe, is compressor surge. But I can't be certain.
I really need some help here guys, I'm completely lost. This tuning tech told me the fluttering is normal for this BOV but didn't say anything about the bucking and stuttering. I'm kinda worried this guy doesn't know what he's talking about. I don't want my $800 turbo to get shelled out because of my ignorance.

Another thing I noticed today was that sometimes the car will randomly pop, like backfire pop, out the exhaust from time to time. It happened twice today. My plugs are burning white, not gray, but pure white. So either they are cleaning themselves off really well or it means the motor is running lean. I am running Denso Iridium plugs equivalent to NGKBPR6ES copper plugs gaped to .026.

 

[LandoAWD]

Boost leak test. If you alter something in your IC piping, this is usually a good preventative measure to take. New flange, new BOV, new IC...you need one.

 

[NightRider97]

I put it up for sale. Had two reputable tuning shops in CA recommend a Synapse BOV for my application, so thats what I'm gonna go with. Both shops told me the same thing, the SSQV is more suited to be blown off into the atmosphere.