Does the HKS SSQV cause back pressure or surge? bad for turbos?

[Funfettie]

I searched around a few times looking for an asnwer, but i couldn't find anything. My buddy told me that the HKS SSQV creates back pressure on the turbo that could lead to shorter lifespan of the bearing/compressor wheel. Anyone have an idea if this is true? i couldnt imagine that this could be that case seeing that its releasing air into the atmosphere, not blocking it causing stress on the turbo. Any thoughts wold be appreciated.
Thanks

 

[gusu]

I searched around a few times looking for an asnwer, but i couldn't find anything. My buddy told me that the HKS SSQV creates back pressure on the turbo that could lead to shorter lifespan of the bearing/compressor wheel. Anyone have an idea if this is true? i couldnt imagine that this could be that case seeing that its releasing air into the atmosphere, not blocking it causing stress on the turbo. Any thoughts wold be appreciated.
Thanks

I'm pretty sure he is talking about compressor surge which is what that would be. It's caused by your blow off valve not opening fast enough and being pushed back against the turbo when the throttle plate is closed but the turbo is still spinning.

I've heard people having problems with low boost on the HKS SSQV, however I've also heard each new version has gotten better. I do believe they are still on version 3.

At low boost they do a fluttering sound, it kind of makes me think that MAYBE these guys simply don't know the difference in sound and freak out? I don't know.

http://www.youtube.com/watch?v=MfsD-6_Dp58 Here is an example, although this WOULD be compressor surge. Although in the comments people are saying he did his vac lines wrong. But I've never owned one so maybe someone who has can be of more use.

 

[rvaughn]

Im at 4+ years on an HKS SSQV with no ill effects. I had heard of issues like this and worried initially. Now I feel pretty confident it is something the rumor mill dreamed up, just my two cents.

 

[GRAVEDIGGER]

Quit listening to your "buddy". Back pressure has nothing to do with the bov on any turbo system. Back pressure is mainly dependent on the turbo compressor and turbine wheel being used as well as the exhaust system.

 

[Funfettie]

Ok, i didnt really believe it, just didnt want to bold on this BOV and have it shorten the life of my new GT35r. dont really wanna spend another $1000+ on a turbo for a while. Haha Awesome, so another question. How do you stop compressor surge? I dont have it, just wondering what the cure is?

 

[GRAVEDIGGER]

Check these threads out.

http://www.dsmtuners.com/forums/tur...mpressor-surge-bov-flutter.html#post152509644

http://www.dsmtuners.com/forums/new...ekend-got-compressor-surge-around-3500ft.html

 

[Funfettie]

Awesome, thanks for all the help guys! much appreciated!

 

[HaveBlue83]

i run a gen 1 legit SQV and it doesnt surge. more like just the natural sound of the system. if i vent it I get a clean chirp. if i recirc it THEN i get the "chh chh chh", but thats just the air going back into the system. it doesnt do it for 10 sec like a surge that makes you say "daaaaaamn thats bad!!". it just does it a few times and stops.

i run recirc as im not SD yet

 

[turboglenn]

The only thing i'veseen the SSQV's do is a little fluttering at little to no boost when letting off the throttle but that's completely harmless, some people that aren't too well informed on turbocharger facts will claimthat it's the same surge that kills turbos but believe me that's only because they haven't heard, felt or experience REAL SURGE, which is a mostly violent bucking of the turbo that can be seen on the boost gauge and heard in the cabin as well as felt in the engine.

MIne is the old 1st generation of SSQ with the adjustment on it and it's worked fine for a long time, now and then they can benefit from being taken apart and lubed up as the middle valve tends to stick sometimes after a few years use, but i've never seen the main valve stick like i have on some older Apexi valves other a fewother models that used large brass pistons that would eventually corrode and get hung up