Recirculated HKS SSQV/Injen sound clips
- Thread starter 505zoom
- Start date
yes, but the wastegate noise wouldn't be affected. other noises (compressor/bpv mostly) you will hear more, the wastegate is on the wrong side to be affected by a material change in the intake. the noise would have to pass through the thick wall of the turbo, somehow get into the compressor side, and then make it to the intake pipe. after just taking apart my internally gated 14b, the wastegate isn't even on a direct path with anything on the compressor side, so it would have to magically change angle to stay inside of the system. then there is the whole fact that it is at the noise occurs at the wrong time for the wastegate to be making it...505zoom said:
i vote for compressor surge too, but can't support it at all, but i know that it isn't the wastegate.
I can't argue the claim of compressor surge at all, it does make a lot of sense. But what exactly is causing this, and what can we do to fix it??? I will get a larger return pipe welded on to the injen to see if that will help at all, but if people running open vent still have the same deal then I don't really see that doing much. Beyond that, I don't really have any other ideas, as I already have hardpipes and IC. What else could it be?
servoeyes said:They keep saying this because everyone gets the sound...even people with hardpipes. It's pretty obviously not the BOV or BPV you use. Some folks are saying it's because you're recirculating, but that's not it either...even people going to atmoshperic vent have heard the sound (although it's muted, since it doesn't reverb through everything.
Find another explanation that makes sense and we'll change our tune!
BTW...That's one angry turkey! hehe...mine doesn't sound nearly that pissed off. I'll have to tune it a bit more now that I have the flash.
I have heard that it is because we do not run that much boost stock. once the boost is turned up the BPV does not flutter.
If that is not it i do not know but it can definatly be the wastegate
leosilva79
Member
- :
- 2003 Titanium Mazdaspeed Protege
I hope this will help answer the question about the surge! On www.blowoffvalves.com they explain it a bit further why you would get a surge when running an HKS ssqv! And I quote them on this
"Why do I have surge (a woo woo woo woo sound) on my SSQV?
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.
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.
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.
Mild surge at little to no boost levels will not damage your turbo.
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."
If you would like to read their info further do the following:
1-go to their site http://www.blowoffvalves.com/
2-click on the HKS logo on the bottom left and scroll all the way down
3-there you will find the answer to your question
By no means do I consider myself an expert but on the contrary... this is my first turbo car and I am still learning a lot about turbos hmmmmmmm yummie, but I think they nailed it pretty well.
LEO
(thumb)
"Why do I have surge (a woo woo woo woo sound) on my SSQV?
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.
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.
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.
Mild surge at little to no boost levels will not damage your turbo.
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."
If you would like to read their info further do the following:
1-go to their site http://www.blowoffvalves.com/
2-click on the HKS logo on the bottom left and scroll all the way down
3-there you will find the answer to your question
By no means do I consider myself an expert but on the contrary... this is my first turbo car and I am still learning a lot about turbos hmmmmmmm yummie, but I think they nailed it pretty well.
LEO
(thumb)
Striker187
Member
- :
- 2008 MS3 GT
problem is there are members using the greddy type s bov and still get the turkey sound. i've emailed robert at blowoffvalves.com a few times and he suspects it's compressor surge.....but i got the impression he hasn't seen the actual setup in person (just what photos i've taken) so he wasn't completely sure.
Okay, so if it is compressor surge, then what do we change to fix it? If running the valve open-vent still causes the surge, then making my return pipe to the injen larger probably won't help any. Aside from that, I have relocated the valve, and have hardpipes, so I really don't have any more ideas on how to fix this. I don't know about you guys, but I don't want this happening, even if it does sound cool
Oh and I almost forgot, does anybody have any explaination for why the vaccum line for the BPV is T'd off of the line to the wastegate? It seems to me that it might function better if it had it's own vaccum line.
Oh and I almost forgot, does anybody have any explaination for why the vaccum line for the BPV is T'd off of the line to the wastegate? It seems to me that it might function better if it had it's own vaccum line.
Striker187
Member
- :
- 2008 MS3 GT
no idea 
maybe email robert at blowoffvalves.com and see what he says about the vacuum line.
maybe email robert at blowoffvalves.com and see what he says about the vacuum line.blowoffvalves
Member
- :
- 88 Celica Turbo
Hi guys,
I just found this thread. This is robert from blowoffvalves.com.
After seeing the video and nearly passing out, I still am certain that compressor surge is apparent. You might wonder why I would think that. I drive an 88 Celica Turbo, which came from the factory with no bypass valve. It makes a similar sound when an open air intake is used or boost raised.
Also, many people have complained about SSQV and surge on other cars, and I have helped them through the process.
I would really love to see the design of the bypass valve system. Looking at the SSQV picture someone posted there, the line to the valve itself looks to be coming from an odd location. You want a nice clean line straight to the manifold if possible. Also the return line is impossibly small there. I'd like to see a 1" tube welded on the intake pipe and a bigger hose going to it. I realize it might be hard to do that to your expensive intake pipe.
Does anyone have one of these beasts in San Diego? I'd love to check it out.
Also, is the sound apparent from Day 1 off the lot? Or when you start raising boost/adding mods. If you are standing still revving, and let off, do you get a strong BOV sound, or more turkey sound.
Thanks guys I hope I can help clear up some of the mystery.
I just found this thread. This is robert from blowoffvalves.com.
After seeing the video and nearly passing out, I still am certain that compressor surge is apparent. You might wonder why I would think that. I drive an 88 Celica Turbo, which came from the factory with no bypass valve. It makes a similar sound when an open air intake is used or boost raised.
Also, many people have complained about SSQV and surge on other cars, and I have helped them through the process.
I would really love to see the design of the bypass valve system. Looking at the SSQV picture someone posted there, the line to the valve itself looks to be coming from an odd location. You want a nice clean line straight to the manifold if possible. Also the return line is impossibly small there. I'd like to see a 1" tube welded on the intake pipe and a bigger hose going to it. I realize it might be hard to do that to your expensive intake pipe.
Does anyone have one of these beasts in San Diego? I'd love to check it out.
Also, is the sound apparent from Day 1 off the lot? Or when you start raising boost/adding mods. If you are standing still revving, and let off, do you get a strong BOV sound, or more turkey sound.
Thanks guys I hope I can help clear up some of the mystery.
Last edited:
- :
- 2001 Mazda MP3
moving to photo/video nice clips.
nice clips.Striker187
Member
- :
- 2008 MS3 GT
hey robert, it's Ash. nice to see you're reading the mazda forums (2thumbs). Yes, the sound is apparent with the car in stock form, albeit quite muffled by the stock airbox. at a standstill while revving, the same fluttering sound is still there too.
Cool, thanks for the reply Robert. I have plans to weld a larger return on to the intake, you say 1" should be sufficient?
I wonder more and more each day, about the way that the BPV's vaccum line is T'd off of the wastegate's vaccum line. Does this make any sense to you at all? It seems to me that both would function better if each had it's own source. I'll try to dig up a pic of what I'm talking about.
On day one with no mods, you can hear the noise but it's not nearly as loud. After putting the injen intake on, the sound is amplified greatly. The HKS didn't really make it any louder, but the actual frequency of the fluttering changed. Kind of like instead of making 5 choo's per second, it now only does 2. Not sure if that makes sense to anyone else, but that's about the only way I can describe it. I have heard sound clips of turbo MP3's, and they have a nice whoooosh of air with no flutter. I realize this is a totally different setup, but also so is mine from a stock msp, and it still does it.
I wonder more and more each day, about the way that the BPV's vaccum line is T'd off of the wastegate's vaccum line. Does this make any sense to you at all? It seems to me that both would function better if each had it's own source. I'll try to dig up a pic of what I'm talking about.
On day one with no mods, you can hear the noise but it's not nearly as loud. After putting the injen intake on, the sound is amplified greatly. The HKS didn't really make it any louder, but the actual frequency of the fluttering changed. Kind of like instead of making 5 choo's per second, it now only does 2. Not sure if that makes sense to anyone else, but that's about the only way I can describe it. I have heard sound clips of turbo MP3's, and they have a nice whoooosh of air with no flutter. I realize this is a totally different setup, but also so is mine from a stock msp, and it still does it.
Ive been bouncing the idea of a seperate line for the wastegate and the bov for a few days. I have heard there is a place for a vacume line on the bottom of the intercooler...any fact?. I would like to get that goin to the wastegate and have the bov on what it is now, just without the "t".
I might try this tonight depending on how much time i have.
I might try this tonight depending on how much time i have.
blowoffvalves
Member
- :
- 88 Celica Turbo
Looks like we have something here guys.
Now, this wastegate line... Where does it lead? Does it go to the manifold? Tapping into the IC is not a good idea. You need the line to the BOV to be after the throttle body on the intake manifold.
On a typical car setup, there is a line from the turbo to wastegate and another line from the manifold to bypass valve.
1" will be fine for the return line, since that is how large the output of the SSQV is anyway.
It looks like there are a few MS in my area, so I will try to wrestle one down and get a Type S installed and see how it goes.
Now, this wastegate line... Where does it lead? Does it go to the manifold? Tapping into the IC is not a good idea. You need the line to the BOV to be after the throttle body on the intake manifold.
On a typical car setup, there is a line from the turbo to wastegate and another line from the manifold to bypass valve.
1" will be fine for the return line, since that is how large the output of the SSQV is anyway.
It looks like there are a few MS in my area, so I will try to wrestle one down and get a Type S installed and see how it goes.
