Ok well I recently went from a turboxs rfl to an hks ssqv, and now Im sure Im hearing compressor surge. Its the hks version 2 that doesnt have an adjusting screw. Its the same vacuum source, same spot as the old bov and all. I know people have had problems with the hks fluttering at lower rpms and what not, but mine doesnt even seem to be fluttering cause the valve opns/closes fine and then I hear the compressor surge very slightly sometimes it doesnt even do it.

Im running a purple insert which kind of changes the sound to more of a fluttering sound than the normal chirp, so the surge kind of blends in afterward but its there. Im gona get the normal insert to see if its more normal, and I even have a fw good friends with an hks that will let me try to them tro see if mine may be defective or something. First Im gona try a direct source to my manifold instead of going to the vacume manifold to see if that does anything.

I didnt realy have this problem after first putting it on, is there anything inside that can be adjusted or greased or anything? Had to add some grease to my rfl after a while as it was sticking. Just trying to get some ideas before buying a different bov.

In my turbo cars, I either install weak springs or cut them so that the valve is partially open at idle. This completely, 100% eliminates surge.

At idle, vacuum overcomes the spring so it opens. At light throttle, there's a bit of leakage, but it does no harm on speed density or alpha-n systems. When you stab the gas, the BOV slams shut, there's no leakage since the chambers are equalized and the spring takes over. When you let off it stays open until the next time you push the gas. Basically, the BOV and throttle are never closed at the same time, so the air always has somewhere to go.

With a strong spring, blowoff sounds like PPPSSSHTTT [insert optional compressor surge noise here]

With a weak spring, it goes PSSSHHHHHHHHHHHHHhhhhhhhhhhhhhhhhhhhhhhoooooooooooooooooooooooooooooooooo

It can last 3 seconds or more after a good spool.

My Saab's TD04 would surge all the time at light throttle because the stock BOV's spring wouldn't open under weak boost, and only briefly under high boost. If you gradually cut loops off the spring until the valve is partially open at throttle, you'll eliminate surge for good.


2002 Cavalier 2200 5spd

Yea Ive heard a little grease and even trimming the spring a bit helps. Ive never taken an ssqv apart aside from having the cover off so Ill prolly take a look at it later.

On my rfl it reacted perfectly aside from being needed greased every once in a while. I only had 1 washer in it(the less washers the softer the spring tension would be) and it worked great.

My ssqv sounded the exact same way at low boost. I think they just have a fairly stiff spring.



FORGET GIRLS GONE WILD WE HAVE GOVERNMENT SPENDING GONE WILD!

same thing with turbosmart.





______________________________________________________________________________________________
~Using nitrous is like having sex with a hot chick with an STD, you wanna hit it, but your afraid of the consequences.~

I know surging at that low rpm isnt too bad, but I dont like it. I can hear/feel the valve blow off close all the way, then surging right at the turbo very slightly. I tried taking it apart to inspect it but those tiny nuts strip pretty easily. Im picking up a 'spare' from a friend, so I can Ill have an extra incase I mess it up.

I plan to cut the spring down a tiny bit, and regrease the valve which I can see needs it when I tried taking it apart.

i personally never like hks bov's.
i love my tial and would never switch back to anyother one..


Built&Boosted moar
04 Cavalier Turbo r.i.p my baby
2nd place 2009 GM tuner bash qwick 8--holla

I'd stay away from grease, especially if plastic parts are involved, especially in cold weather. It slows down the valve's motion and it attracts dust that turns into gunk. Most valves work just fine bone dry. You might try getting some Remington Dri-Lube spray from a gun store. It leaves behind a coating of dry teflon. I use it on pistols and bicycle chains. It would probably work great on blow off valves too. I'd still suggest cutting the spring until the valve is partially open at idle.


2002 Cavalier 2200 5spd

So I got a version one adjustable hks from my buddy and took it apart. These models are adjustable, but the problem is that they are too firm to begin with. So I cut the spring down so its softer, and can adjust firmer if need be. Im using my version 2 which I got apart, the cut spring and adjustable version one face, and also regreased it which I know mine was sticking a bit as it was used. Works flawlessly now with no surge, I may even need to firm it up a bit which I can do now that the spring is softer.

Thanks for the help guys!

Mike, mine is doing the same thing. I may need to send mine to ya to do if you dont mind lol. I dont wanna attempt to take mine apart











~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ

Great topic guys! I'm working on trying to set mine up. This is helpful.

Just some pics for Dave showing the hks apart and what I did. With the spring out, pulling it open and closed I could feel it sticking.

Where it mounts, the purple shaft of the valve was regreased.


With the face off


The valve fully open from the outside


With the face off, the valve fully open. I also greased the valve through here as well



The spring and top that is pressed down by the face cover. The spring wasnt cut in these pics, and you can see a mark on the cap from where the adjusting screw does adjust the spring pressure which searching on other forums beforehand I heard it didnt.

So essentially, you greased the valve, the purple shaft, and changed the insert correct? I found those inserts on Ebay. I might grab one soon.











~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ

I also cut the spring down a bit so its softer. People have claimed that the older adjusting style does nothing when adjusted, but if the spring is already too stiff then making it tighter isnt going to help. Soo I cut the spring down a bit soo there is room to make it firmer if its reacting too quickly and not holding the pressure it should.


The insert is strictly sound. I like the purple insert, its not has igh pitched and has a nice tone to it, there are good examples of the inserts on youtube.