Is this compression surge - new HKS SSQV w/FM full intake

[mojobama]

Ok so now I’m confused. I know this has been hashed over and over but I took a half a day off work to install my HKS SSQV and sure enough it fixed the light load fluttering but now I’m getting what I think is bad compression surge in the upper RPM range when shifting. This is completely opposite of the problem I had with the GFB VTA BOV, with that I would get fluttering at light load conditions but it worked great over 4500 RPM’s. I made a video (quality sucks buts it’s the audio I want people to listen to)

http://www.youtube.com/watch?v=6aW6ZMzVadw

I do get the “whistle” sound from the HKS BOV but it’s zeroed out by the sound you here in the video coming from the driver’s side. So, if you can please listen to it. Is this compression surge? I have the FM complete intake.
Do I have to go to recirculation, my hands are thrown up!

[got rice?]

doesn't sound like surge  but there is some wind noise that drowns out the noise so it's hard to say.  If you think you're surging at full throttle, soften it.  Flutter at partial load is normal.

[CrackerJackToy]

I think your bov may be sticking a little, lube it up with some WD-40 or something. 

[snig]

This should help explain.

http://videos.streetfire.net/video/6c1bbafe-cdc3-43e9-a3c9-983f0150f005.htm

[mprhead5]

Yup the BOV is not venting all the pressure and is causing a pressure pulse to travel back to the compressor wheel and stall it out.

loosen up the spring on your valve and see if that makes a difference. ( I think ) the reason that the GFB causes this is that it takes a certain amount of pressure to actuate it. Other valves don't have this problem but what you have is the valve not opening enough to vent all the pressure. lube the valve and loosen the spring

[mojobama]

I think your bov may be sticking a little, lube it up with some WD-40 or something.

Thanks, remember this is a HKS SSQV BOV same kind you were / did install. I take it your were not getting the same reaction you heard on my "low quality" video? Works fine with no light-load flutter but now getting heavy-load compression sound that does not sound like flutter more like hitting a puddle at full speed the sound it would make under your wheel well (real harsh / sharp sound).
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Yup the BOV is not venting all the pressure and is causing a pressure pulse to travel back to the compressor wheel and stall it out.
loosen up the spring on your valve and see if that makes a difference. ( I think ) the reason that the GFB causes this is that it takes a certain amount of pressure to actuate it. Other valves don't have this problem but what you have is the valve not opening enough to vent all the pressure. lube the valve and loosen the spring

There is no adjustment to it that I'm aware of, it's a HKS SSQV but thanks.
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This should help explain.
http://videos.streetfire.net/video/6c1bbafe-cdc3-43e9-a3c9-983f0150f005.htm

Thanks, Mine sound idential to the video you provide when reving up like there doing in the video. At light load it works 100% better than my GFB VTA, but unlike the GFB VTA the HKS SSQV is giving me harsh air back on high RPMs.

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I know Foz has the HKS but I don't think he has the FM air intake. Could it be that there just is no good solution using the FM cold air intake system
except to recurlate? Anybody out there using a HKS SSQV with the FM throttle body pipe and the FM cold air intake system? I think I'm going to put my GFB VTA back on (atleast I can control that and manage no surge with throttle control) and order a Recirculation fitting ($16 w/shipping - no hose included) for the HKS SSQV and see if my problems with it go away and GIVE UP ON VTA.

[mojobama]

If anyone reads this that has the full FM intake (throttle and cold air) and stock ECU an uses the HKS SSQV VTA BOV and it works fine for them let me know please.
So, I verified there is no adjustment on the HKS SSQV and “WD40’ed” the valve but still terrible surging in upper RPM’s but fine in lower RPM’s. I put the GFB VTA back on and it works just like always, flutters at low RPM’s (but can be managed with a bit of throttle control just don’t want to) and the great “wooooosh” in anything above 4500 RPM’s.
Same vacuum hoses no changes other than the actual BOV. So I ordered a recirculation kit for the HKS if this cures all then fine, screw VTA. I’ll update when I have that installed. But for now I’ll live with the GFB VTA.

[SilverMiataRacer]

The next thing you need to do is go back and actually lubricate the valve.  If you used WD-40 on it you just cleaned it and prevented any rust from forming temporarily but you also took all the lubricant out of the valve.  WD-40 is NOT a lubricant.

For those of you having issues with these BOVs maybe you need to consider not buying the "designer name parts" and buy things that work instead.  Dyno4mance has mentioned he is using a Bailey recirculating valve and I'm using a Bailey VTA valve and we both have no issues.  Also people using the Forge valve have no issues.  Forget the name and buy what works.

[mojobama]

The next thing you need to do is go back and actually lubricate the valve. If you used WD-40 on it you just cleaned it and prevented any rust from forming temporarily but you also took all the lubricant out of the valve. WD-40 is NOT a lubricant.

For those of you having issues with these BOVs maybe you need to consider not buying the "designer name parts" and buy things that work instead. Dyno4mance has mentioned he is using a Bailey recirculating valve and I'm using a Bailey VTA valve and we both have no issues. Also people using the Forge valve have no issues. Forget the name and buy what works.

Thanks I'll lube it up  . The thing is I believe recirculating will cure this issue (at least I hope so) but I was shooting for VTA. You stated you use a VTA do you have the FM "stuff" (throttle and CAI) with the stock ECU and MAF? I'm beginning to believe this "combo" just isn't going to work out with VTA. I believe the Forge is also a recirculating valve (correct me if I'm wrong).

[SilverMiataRacer]

I have the complete FM intake, O2 mod and DP with the stock ECU and MAF.  I had a GFB VTA BOV that I did not buy from FM.  It was not up to my standards.  I replaced it with the Bailey valve that I had on my other turbo car.  It requires a reducer tube but it works fine.  I don't remember the size but it might actually fit the BEGI TB with a straight hose.  When I finally put my other car back on the road I will just buy another of these valves for it.  The aren't easy to find but worth the effort.

[mojobama]

I have the complete FM intake, O2 mod and DP with the stock ECU and MAF.  I had a GFB VTA BOV that I did not buy from FM.  It was not up to my standards.  I replaced it with the Bailey valve that I had on my other turbo car.  It requires a reducer tube but it works fine.  I don't remember the size but it might actually fit the BEGI TB with a straight hose. When I finally put my other car back on the road I will just buy another of these valves for it. The aren't easy to find but worth the effort.

Sounds like the only diffrence is the BOV! I'm still going to try the recirculation route with the HKS since I've got it but if that does not work I'll be looking at the Bailey and put the HKS up for sale. Believe me I'm not out for the name brands I just had done some research and had heard nothing but good about the HKS. For now I can live with the GFB. Thanks for the input!!

[mark13]

Hmmmm thats odd no one has had any issues with the HKS and now you and Jack have both had problems with it and you both just installed it this week..I tryed to ebay one and lost out at the end..

[got rice?]

This should help explain.

http://videos.streetfire.net/video/6c1bbafe-cdc3-43e9-a3c9-983f0150f005.htm

Not exactly a good comparison test between the HKS and Synapse unit.  The Synapse unit is hooked up to the IC piping so it has boost pushing it and the vacuum pulling it.  The HKS unit is just sitting there, so it only has the vacuum pulling it.  At the end with the drive by, you can hear the Synapse unit flutter.

[SilverMiataRacer]

How does the HKS only have vacuum pulling it??  There is boost on the intake side of the piston and vacuum on the other side when it is supposed to blow off.  So the vacuum pulls it and the boost pushes it, right??

[mojobama]

Hmmmm thats odd no one has had any issues with the HKS and now you and Jack have both had problems with it and you both just installed it this week..I tryed to ebay one and lost out at the end..

Yes I thought the same thing, but I got mine from an on-line store not EBay an it's the "2007" version so they were not purchased from the same vendor, and the problems are totally diffrent.