HKS SSQV flutter....

[the mike]

So I put a used HKS SSQV on the EVO yeaterday. That was fun. :roll:
First off, no instructions means a lot of guess work. The logical way to put it on so it fits the best is backwards. First oops.
Second, this thing flutters FOREVER under no load, high vacuum situations. If I come off throttle to a coast, it seriously flutters for like 3 or 4 seconds. Not sure if this is normal or not. None of the sound clips I have heard do this. :shrugs shoulders:

FRED!!! Does yours flutter? I am kind of afraid that I bought a piece of crap used part....

[MuddyREX]

Every SSQ I have heard sounds like a chirp. Real fast and real high pitched. I've never heard one flutter.

When my GFB isn't opening I can hear the wastegate fluttering. That is pretty loud and last a bit longer. I usually have to lube it up, but I heard that HKS's don't ever have to be lubed...

[Smokescreen]

Flutters like how? Wastegate flutter? There should be no flutter at all when in the vac. When you are reading about 0 on you gauge, there should be alittle noise, but not the high-pitch chirp like in the clips. You only should hear that when under heavy load/boost. The HKS shouldn't have to be lubed, but it can be adjusted by the knob thing on the front (vague, I know).

You don't even have the Japanese instructions? You plugged the intake, right?

[the mike]

The SSQV is plumbed back into the intake, and unfortunately since I got it used, there aren't even Japanese instructions.
It flutters at high vacuum situations like off the throttle. I never hear a chirp at all, but that could be because it vents into the intake.
I am not too happy with it thus far...

[Orbit]

Can you cap off the recirc hose? try that. it may not be letting out enough pressure. the back pressure will cause fluttering. seems to me something is wrong though. can you move the piston with your hand. the hks's that i have seen if working right, never flutter. there is also diffrent rings to change the sound.I dont know if it is the stock one you have that chirps. remeber bob and liddy having problems with there hks might want to talk to them.. if all else fails tim has one for sale with all 3 noise rings.

[Fantayzias]

I hope this makes sense. Mine stopped making the chirp and all I got was the flutter which was compression surge. I took the whole entire thing apart cleaned and lubed it and still nothing. I guess it was the diaphram that stopped opening. I heard different things to do like replace the inline filter or cut the spring. Ive heard this happens a lot with this BOV after about a year of use. But it sounds like yours is doing what mine did. I have the original box and instructions if you need them.

[Smokescreen]

I don't think it is compressor surge. I think you should check your vac lines.

Remember: plumbing the intake = compressor BPV = what the wrx/evo have to start with. This means no chirps for you (I think). You can still get the wastegate to flutter under high load conditions. It should sound like...like..you flipping through a dictionary's pages. You could get the wrx to do that if remember. Full boost in 2nd or 3rd, then let off on the throttle quickly.

PM jc8889 or talk to him for more info. I also have the box and instructions if you need to take a look at them. Also can arrange a wrx w/ an hks on it to come to you if you need to look at it, but I think he is venting it.

[the mike]

Thanks guys. I think i'll take a vid of the BOV flutter. It might be a kinked line, but I think the line is cool.
I'll see if Troll can host a short vid...

[WKderF]

mine doesnt flutter hardly at all. its actually tough to get it to flutter, i have to feather the gas just right in order to do so. keep in mind that i vent to atmosphere. ill be up as allways so u can hear it.

[kef]

One of the guys at work has this BOV on his Evo... it makes alot of funny noises. It vents, then whistles then flutters then whistles again. It sounded f'd up to me, however he tells me that's how it's supposed to sound. ::shrug::

I know my GFB used to flutter like mad under boost below where the engine was breathing well. if I let off the throttle when coasting through a turn in a in third.

[Orbit]

thats what i was trying to say. unlike most bov the hks when working right, is hard to make flutter. so there must be a problem


mine doesnt flutter hardly at all. its actually tough to get it to flutter, i have to feather the gas just right in order to do so. keep in mind that i vent to atmosphere. ill be up as allways so u can hear it.

[20th1519]

My HKS SSQ has a flutter to it at low rpms when i short shift the car. Mine sounds like a faint "whop". I thought it was my imagination.

[wgknestrick]

This has to be one of the most troublesome BOVs I've seen. It is very likely to cause compressor surge (as are any 2 stage BOVs) and the adjustments just aren't fine enough to get it dialed in. This is on almost any car. It does make a unique sound which is why people are attracted to it, but as a BOV standpoint, it just can't vent enough air fast enough to keep the turbo wheel spinning during regular driving. Part throttles lifts and it just surges like mad.

If a BOV makes any other sound than air venting, (psssssssh) it is almost always causing compressor surge. This is all BOVs do, release air. If you hear something else than air being released, the BOV is not functioning properly. It isn't venting air fast enough and the turbo wheel is slowing down because the air has stopped flowing when the TB has closed. BOV didn't open when it should and the compressor is flowing against a wall, pressure spikes...not good Your compressor blades take that pressure spike and they aren't' made to handle it for very long.

Any BOV with the original DSM popit design is superior. They open and vent so much faster than anything else, why try something different? Compare them and you will see why they are better

OEM DSM, OEM WRX, and TiAL BOV, are all good with really the Tial being the choice for high boost applications >20psi. They are almost the same design.

Bill

[272sWrx]

yeah i love my stock bov.I have had the hks ssq and the turboxs hrfl, they both suck in my opinion.

[the mike]

Wow, back from the dead. :wiggle:


I have an APS on there now and I heart it. The stock diverter valve doesn't hold the bosst I need it it because it is plastic.

[sPrSw2o]

mr2 bpv is stated to be one of the best designs....

[Little G]

i have an hks suction intake for my evo and it flutters all the time.

[moorefire]

i have an hks suction intake for my evo and it flutters all the time.

then adjust your bov properly