Its fine, I barely hear mine NLS in a tunnel.

 

Installed.. hearing nothing.. but, it was ten bucks.. I learned a little more about my car and it is a better spring, for whatever that's worth.. I went and bought all the proper tools after the install. Certainly was a pain in the ass trying to get in there with oversized tools and improperly sized rachet heads!!

Worth it or not...? If you just want somewhere to start with getting into the engine then it's a good buy. If you are looking for anything of real value, spend your dollars elsewhere..

 

I think its safe to say, if you are on the stock air box.........you will not hear nothing or notice anything different

with an open cone setup, there is definitely a difference in sounds, its not much louder, but the pitch of the BOV definitely changes

 

I will agree with the stock airbox good luck hearing yor bov. I now have a dejon short ram air and I can hear the bov it actually sounds really good. doesnt sound ricy

 

Ordering soon. I'll consider it $10 insurance to get the most out of stock BPV and to help support ? future mods. And yea the "psshhh" is even if its not actually telling me everything is functioning better.

 

When other cars start to fail at these reflash levels , I might consider it, but until then I still dont think it is worth jepordizing the stock assembly.

 

i now have over 3000miles with this spring, along with all HAHN parts with the PPC tune, it holds the boost really well at any speed. ive never had a check engine light with this spring.

thats it really, i have no problems to report due to this spring

 

I dont think that the spring should cause any problems. I am saying I dont think that there is anything really wrong with the stock one. Dont fix what aint broke.

 

It's more for preventative measures... The stock spring made for 16psi won't hold as long or a good at 22-23 psi...

 

You do realize that when you're running 23psi, that same amount of pressure is also keeping the spring closed? The pressure from the spring and boost should keep it closed no matter what, unless someone did some tests that shows otherwise? I doubt it.
You don't see any spring upgrade being included with the gmpp tune upgrade for the solstice and hhr do you? And some people see spikes to 25psi with it.

 

Dont need to prevent anything , if it works just fine. Are you guys the same people that build bomb shelters...just in case? ...lol

 

if it could be done for $10........yes

 

k. Enjoy your $10 box of fail.

 

wait, are u selling 10 dollar bomb shelters? You'll make a fortune off of that. I'll have three.

(anybody get that pen is mightier reference?)

 

Why is this even a debate.... It's a $10 insurance policy! SO because GM didn't include it in their kit means it isn't needed. Yeah neither was 60's for the LSJ untill you want more!

I'll keep my $10 mod and my 300+ whp and enjoy it everyday!

 

Can i sell you some muffler bearings while you're at it, only $9.95...

 

I'm with you two. I think the short term effects that this mod claims to overcome (whether it does or not) isn't worth the potential longer term wear/tear that turbo is exposed to. More spring pressure means more engine vacuum is required to open the BOV. To me, that means that the threshold between where the engine is going into or coming out of boost is where the turbo will see added stress. If you're near that threshold and the throttle closes some, there won't be enough engine vacuum to open the BOV and the turbo will be fighting the added pressure. Granted, it's not as dramatic as when the throttle closes completely and you get that party favor sound. But, it's still and added element of stress.

As mentioned above, the spring plus the boost pressure coming through the line that attaches in the center of the cap should produce a sufficient force to keep the BOV closed. Unless someone can produce some solid results showing this mod worthwhile, I'll be holding off.

 

Speaking of the throttle closing completely... it never does. During shifts the electronic throttle is around 20% open, so you don't get all the vacuum that you'd normally get when the throttle body is fully closed. Add a stiffer spring to the equation and the bov opens even less now, sure you get a better sound, but imo its not worth it.

 

Looks like I might be taking the sring out then. Don't want the solenoid to burn out on me.

 

Did you really think GM's engineers said, oh lets save a few cents and go with a inadequate BPV spring? please...

 

Thanks, some more intelligence in this thread.Seriously.

 

im at work. i cant read through 13 pages.

does the spring void the warranty?

can GM tell the difference in the spring?

 

Next , there will be massive threads about the turbulence of the intake systems and the MAF readings going haywire, something I said in my 1st posts here LOL

 

My MAF had a 2% error with the Dejon Intake. It had a 1% error stock. No turbulance as long as you make sure everthing is sealed up tight. I cannot speak for the CAIs though.

 

I read somewhere that many manufacturers purposely design an unequal BPV/BOV. Meaning that if boost reaches past a certain level the spring side will give way and allow boost to leak. The purpose is for reliability by helping to prevent boost spikes from doing damage in the long run.
With the increased boost it IS actually possible to have a boost leak with a stock BPV.

Like you said, I haven't seen anyone do a test on THIS one. But it's not impossible or unlikely that it would leak at the increased boost levels.