03-09-2018, 12:47 PM | #221 | |
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I will do it all and then post the video when I am done.
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03-09-2018, 12:51 PM | #222 | |
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Wish you were AWD so it would be real world install idea for me (not wishing you a rougher install though)
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03-09-2018, 12:57 PM | #223 | |
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I hope it's that easy. Good luck!!
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03-09-2018, 01:43 PM | #224 |
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03-09-2018, 02:49 PM | #225 |
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Just scored the GFB DV+ T9356 for $107 shipped off eBay
Seller accepted $134 offer + there is a 20% off eBay coupon (PSPRING20) good till end of today on anything saving me an xtra $26.80
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03-09-2018, 03:37 PM | #226 | |
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Can cause CEL
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03-09-2018, 03:51 PM | #227 | |
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03-09-2018, 04:11 PM | #228 | ||
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I haven't heard of any CEL problems
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03-09-2018, 05:00 PM | #229 | |
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Here is a really good write up of the install on an N20, which has its similarities.
http://f30.bimmerpost.com/forums/sho....php?t=1153103 And here is what GFB says about the spring. "GFB T9357 DV+ Configuration / Tech Tip: The GFB DV+ can be configured in two different ways depending on you own personal preference. During assembly, you can choose to install the main piston spring (indicated by the arrow) or not. For my installation the main piston spring is installed in the DV+. Using the spring is recommended because it results in the best possible throttle response and minimum lag on gearshift, particularly on manual cars. This can sometimes result in a slightly different sound from the intake at low RPM, which is no cause for alarm - it’s simply the different way in which the valve works. If however the noise is objectionable, removing the spring will make the DV+ operate the same way as the factory valve, albeit at the expense of throttle response. To explain further, minimum lag on gearshift on any petrol turbo engine is achieved when the diverter or blow-off valve vents only just enough air to prevent compressor surge. Venting more air than necessary increases lag on gearshift because the intercooler is completely relieved of pressure, meaning it takes longer to return to peak boost when the throttle is re-opened. The DV+ is no exception, because unlike the factory diverter, the DV+ opens and closes in response to both the DME command AND the amount of boost pressure in the intercooler. So when the DME triggers the solenoid, the DV+ piston will only open as far as the boost pressure in the intercooler can push it against the spring. The factory diverter on the other hand will simply open regardless of the boost pressure. The different sound on throttle lift at low RPM is simply because of this different operation method, and it does not adversely affect the turbo or engine. Removing the spring means the DV+ piston will simply open and close when directed by the ECU, just as the factory diverter does. " Quote:
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03-09-2018, 05:13 PM | #230 | |
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03-10-2018, 07:43 AM | #231 |
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Is the diverted valve a must have after having the tune installed? I am also a 6 speed awd.
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03-10-2018, 10:49 AM | #232 |
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It's more preventative maintenance then anything. There is reports of increased throttle response though. The stock DV is not designed for the higher boost pressures of tuned cars, so it will experience premature failure. You'll notice in the logs that the car can't hold boost (measured boost not meeting demanded boost). I have a DV+ sitting on the shelf so when my stock DV goes out I have a replacement.
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03-10-2018, 11:12 AM | #233 | |
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2k15 335i Msport xdrive 6spd
Wagner Comp2 FMIC,FTP CP,stock exhaust. Fabspeed Sport catted DP, KW V2 coil overs,FBO BM3 Stg 2 Last edited by ceedawg; 03-10-2018 at 11:25 AM.. |
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03-10-2018, 03:42 PM | #234 | |
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03-11-2018, 08:31 AM | #235 |
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03-11-2018, 05:29 PM | #236 | ||
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The fault definitely only happens if you install the extra spring they include to allow the variable function of the valve vs. strictly OPEN/CLOSE operation like the OEM valve. The spring does not have to be installed for the DV+ to work, but it's kinda defeating the purpose to not install as that is the feature that increases throttle response over the OEM From the GFB instructions: Quote:
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03-11-2018, 07:14 PM | #237 | |||
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03-11-2018, 07:19 PM | #238 |
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What do they (GFB) mean by "different sound" of the intake? Does that mean strange? Louder ? Quieter?
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03-12-2018, 03:05 AM | #240 | ||
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03-12-2018, 07:10 AM | #241 |
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^ THIS!! Also increased throttle response due to retention of charged air during gears shifts. I think this would be even more important for me with 6MT.
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03-12-2018, 09:42 AM | #242 | |
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With the DV+ it holds boost much better, and also replaces that rubber part with a metal one. Its required if you go beyond 17psi. Though people change it when they change their turbo.
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