04-05-2018, 05:22 PM | #67 | |
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04-06-2018, 07:19 PM | #68 |
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BunkerJ Does the flutter sound come in also on load? Can you make a vid of the sound while driving? (maybe put your phone or camera in the engine bay to get the best sound. Thanks
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04-06-2018, 07:31 PM | #69 |
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No, it doesn't. Low RPM/Boost only. See first page for my video.
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04-06-2018, 07:33 PM | #70 |
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Yup I did see it, just wanted to confirm for driving with load
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04-06-2018, 07:39 PM | #71 |
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I get it much less when under load and really only if I cut it before 3k RPM, otherwise it doesn't flutter. Much harder with the bigger turbo. If someone with the stock turbo gets flutter, they could do it for sure.
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04-10-2018, 04:48 PM | #72 |
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How much louder is this than the stock one? I installed an Injen intake expecting to the DV to be super loud. It’s definitely louder, but not what I had in mind.
I even left the cover off the intake. Last edited by ilivas; 04-10-2018 at 05:09 PM.. |
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04-10-2018, 05:23 PM | #73 |
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It's the same noise, if not quieter at sometimes. You will get some valve flutter, which is nice to hear. I wouldn't expect it to be louder.
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04-10-2018, 11:33 PM | #74 |
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04-11-2018, 09:39 AM | #75 | ||
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BunkerJ ilivas
I sent this to GDP and their response Quote:
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04-11-2018, 10:29 AM | #76 |
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I'm going to email it because that makes zero sense. You framed the question incorrectly stating that this WAS compressor surge. What also doesn't make sense is that I have had this on both of my turbos, one of which is a brand new solenoid. Secondly, they clearly state that flutter is normal. So either they're going back on their word or he was severely misled by the wording of your question.
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04-11-2018, 10:42 AM | #77 | |
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User: Sometimes while only boosting a couple PSI or accelerating while still in vacuum and then coming off the accelerator there is a flutter noise. Before everyone get's there panties in a bunch THIS IS NOT COMPRESSOR SURGE. The flutter is due to the way the DV+ operates and is normal. Here is GFB's response to the flutter noise: GFB: We recommend using the main spring unless there is a reason not to, so that throttle response is optimized, since that’s one of the key reasons to replace the factory valve (as well as longevity and boost-holding). As the tech article explains, the turbo will make a different sound under certain conditions at low RPM (only noticeable with an aftermarket intake), which is not compressor surge and is not harmful to the turbo or engine, but nonetheless some people may not like it. In that case, removing the spring will make the DV+ behave like the factory valve, so the different noise will be gone. The boost pressure and turbo are fairly irrelevant as far as the main spring go. You could potentially say as a blanket rule to the guys with a DSG gearbox that they can install the DV+ without the spring, because throttle response on gearshift is much less important than it is to the manual guys. Personally however, I’d always take the opportunity to improve throttle response by installing the spring and taking it out if necessary, rather than not installing it and never knowing potentially what I’m missing. That’s really the whole point of modifying something. There’s absolutely no harm in trying it – the worst that will happen is you don’t like the noise in which case you take it out.
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04-12-2018, 08:15 AM | #78 |
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Pardon me if someone already mentioned this but.. that is the sound a fake DV+ makes. Where did you buy yours from? Budy of mine had a fake one and a real one to show me.
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04-12-2018, 09:04 AM | #79 | |||
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While I can't say a fake DV+ will make this sound, the real DV+ will also make this sound and it's not incorrect. I don't want to sit here and type out the exact reasoning of how this thing works again, but I will say again: If you get flutter under low throttle, low boost, low RPM, you name it, this is completely NORMAL. If you are receiving flutter in the higher RPM range, under high boost, or even while you're still on the gas, then yes, this is wrong and actually compressor surge. Quote:
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04-12-2018, 09:16 AM | #80 |
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Did you buy it directly from GFB? I can't find the manual for DV+ i've seen but even they said that a flutter sound is not right. It should make a swoosh sound all the time.
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04-12-2018, 09:54 AM | #81 | |
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Did you fail to read my last post or any others that I made in this thread?
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04-12-2018, 01:19 PM | #83 | |
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But regardless, confirmed several times as noted that the noise is normal.
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04-12-2018, 03:14 PM | #84 | |
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I had a super heavy spring in my STI blow off valve because I needed it to hold boost at 42psi. The drawback is it wouldn’t open at lower boost and partial throttle because the spring was so stiff. Turbo lasted quite a while. Last edited by ilivas; 04-12-2018 at 03:20 PM.. |
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04-14-2018, 07:28 PM | #85 |
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Does the stock one leak after increasing boost? I ordered one. I saw that with the n55 charge pipes, you can get them with tial flanges for tial bovs. I wish they had them for this.
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04-15-2018, 12:24 AM | #86 |
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They can. Similar to the stock CP, they have a chance. Mine was leaking some around 85k. That was about 20k of +4-6PSI over stock
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04-15-2018, 12:29 PM | #87 |
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I wasn’t sure if it just wasn’t able to hold higher pressures. The stock STI valves won’t hold more than 20psi before it starts leaking. The spring was too weak
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04-15-2018, 03:23 PM | #88 |
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Ah, gotcha. Yeah, spring can take it, but you risk tearing the diaphragm on these ones.
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