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BoV suggestions (flutter dump w/ stock BOV) - Resolved w/ Dodge Mod


EfiniX
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Galant VR-4 org Post #: 1176999 posted 06/20/14 09:16 PM     Remind Me!  Send Private Message   Edit Post      
I've noticed a flutter from my current BoV when shifting at higher boost levels. I'm guessing that my new cams have lowered my vacuum at idle enough to render my current BoV obsolete. And considering the BoV itself appears to be stock....

So, what is a good option for me? And Evan, I know you are reading this. Should I get a new MBC while I'm at it?


Thanks to all.


Edited by EfiniX (07/09/14 12:14 AM)

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EHmotorsports
Capt Fabbin Stabbin
1865/2000


Galant VR-4 org Post #: 1177000 posted 06/20/14 09:34 PM     Remind Me!  Send Private Message   Edit Post      
If you have V3 full I would run it through link.



click

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tektic
Senior Member


Galant VR-4 org Post #: 1177001 posted 06/20/14 09:36 PM     Remind Me!  Send Private Message   Edit Post      
When I was looking I liked the Turbosmart. I have their MBC now

part number: TS-0203-1226

I still may get it.

At higher RPM and low throttle my bov flutters and makes the car buck... or is that my WG?



7 1G DSM's now a GGSX build.


Edited by tektic (06/20/14 09:37 PM)

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92_talon_awd
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Galant VR-4 org Post #: 1177002 posted 06/20/14 09:37 PM     Remind Me!  Send Private Message   Edit Post      
I had a Godzilla BOV on my last car, loved it. click



1992 VR4 29/1000 - Stock/Garage Dweller
1999 Jeep Grand Cherokee Limited - DD

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turbowop
Hard Snarker
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Galant VR-4 org Post #: 1177005 posted 06/20/14 10:02 PM     Remind Me!  Send Private Message   Edit Post      
Cams won't change how well a BOV works. Idle vacuum is not the same as going from boost to vacuum, regardless of cams used.



-Mark

A face only a grocery shopper could love.
1051

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EfiniX
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Galant VR-4 org Post #: 1177007 posted 06/20/14 10:07 PM     Remind Me!  Send Private Message   Edit Post      
Actually great to know. Thank you. Still, it would seem I'm in the market...



RIP 543
Ded click
2006 Suzuki SV-650 (for sale)
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Posts: 647 | From: portland, or | Member Since: 10/18/12 | IP: (208.54.32.175) | Report this post to a Moderator

EfiniX
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Galant VR-4 org Post #: 1177008 posted 06/20/14 10:09 PM     Remind Me!  Send Private Message   Edit Post      
I do have the full version and capital idea, sport! I'll will start buying the bits I need as running it through link solves the tunI my problem as well.



RIP 543
Ded click
2006 Suzuki SV-650 (for sale)
2011 BMW 335d (~510'lb/tq and 36mpg. hwy. How can you go wrong?)

Posts: 647 | From: portland, or | Member Since: 10/18/12 | IP: (208.54.32.175) | Report this post to a Moderator

prove_it
my racist jokes aren't actually funny
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Galant VR-4 org Post #: 1177038 posted 06/21/14 08:14 AM     Remind Me!  Send Private Message   Edit Post      
To this day I swear the 1G valve (modded) is the king of valves to use. It's fast moving, cheap, NOT annoying, and can be modded to hold 30psi.



#1284/2K NB, Totaled
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EfiniX
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Galant VR-4 org Post #: 1177050 posted 06/21/14 11:15 AM     Remind Me!  Send Private Message   Edit Post      
So dodge garage mod and be done with it?



RIP 543
Ded click
2006 Suzuki SV-650 (for sale)
2011 BMW 335d (~510'lb/tq and 36mpg. hwy. How can you go wrong?)

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prove_it
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Galant VR-4 org Post #: 1177051 posted 06/21/14 11:24 AM     Remind Me!  Send Private Message   Edit Post      
That's my opinion. I noticed a little low throttle surge with mine. I set up my link to switch the lines on the BOV and it performs flawless. Opens fast under light load like stock, but I've hit 27psi and had it hold solid. Never had a 1g BOV fail or quit on me in over 10 years. They are cheap and plentiful and lets you put the money somewhere else. My biggest praise is that it's not obnoxious loud and is pretty quiet, but still noticeable.



#1284/2K NB, Totaled
#715/1K KG, Rebuilding
02 Acura TL daily duty unit

12yr+ Vr4 owner.
Honda/Acura master tech.
Family Guy

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EfiniX
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Galant VR-4 org Post #: 1177057 posted 06/21/14 12:21 PM     Remind Me!  Send Private Message   Edit Post      
I suppose I should describe the issue, too. Car holds boost just fine up to 23psi. However, when I shift at higher boost (lower is ok), I get a fluttering sound like psht psth psht. no notice issues in drivability.



RIP 543
Ded click
2006 Suzuki SV-650 (for sale)
2011 BMW 335d (~510'lb/tq and 36mpg. hwy. How can you go wrong?)

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manikbastrd
A Negro's Savior
504/1000


Galant VR-4 org Post #: 1177059 posted 06/21/14 12:30 PM     Remind Me!  Send Private Message   Edit Post      
Get a new BOV (I like greddy) and then properly adjust it. Just my .02$



Co-Founder of Shitbox Racing

1992 Galant VR4-stuff has happened...
2012 Boss 302 Mustang(DEAD)

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EfiniX
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Galant VR-4 org Post #: 1177076 posted 06/21/14 05:02 PM     Remind Me!  Send Private Message   Edit Post      
After watching some youtube videos and listening to the BOV sounds different cars with different problems were making, I think I can say with a fair degree of certainty that I'm experiencing flutter dump.

A new BOV will most certainly solve this problem. Will the dodge mod solve it as well?

C



RIP 543
Ded click
2006 Suzuki SV-650 (for sale)
2011 BMW 335d (~510'lb/tq and 36mpg. hwy. How can you go wrong?)

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coyotes
Hipster VR4
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Galant VR-4 org Post #: 1177083 posted 06/21/14 06:12 PM     Remind Me!  Send Private Message   Edit Post      
Have you crushed it yet?



1226/2000

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strokin4dr
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Galant VR-4 org Post #: 1177094 posted 06/21/14 11:04 PM     Remind Me!  Send Private Message   Edit Post      
Dodge garage mod here. I love it. Holds everything I throw at it and works flawlessly. I was planning to connect it to a solenoid through ecmlink but its not ever needed.



Ryan C.
1908- sold and missed.
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EfiniX
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Galant VR-4 org Post #: 1177097 posted 06/21/14 11:19 PM     Remind Me!  Send Private Message   Edit Post      
Quoting coyotes:

Have you crushed it yet?




No, but I suspect that doesn't fix my issue. If it was a spring tension problem, I would expect to hear flutter while spooling. I get to 23psi with no issue, and hold boost at around 21 through the RPM range. I'm only getting flutter when I clutch off of high boost.

I suppose it could be leaking and I wouldn't hear it?



RIP 543
Ded click
2006 Suzuki SV-650 (for sale)
2011 BMW 335d (~510'lb/tq and 36mpg. hwy. How can you go wrong?)

Posts: 647 | From: portland, or | Member Since: 10/18/12 | IP: (75.164.165.221) | Report this post to a Moderator

coyotes
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Galant VR-4 org Post #: 1177098 posted 06/21/14 11:44 PM     Remind Me!  Send Private Message   Edit Post      
They hold more boost when crushed. It seems they start to leak over 17psi, but who knows if that is causing your flutter issue. I can't say much more out of not knowing enough on the topic.



1226/2000

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EHmotorsports
Capt Fabbin Stabbin
1865/2000


Galant VR-4 org Post #: 1177101 posted 06/22/14 12:27 AM     Remind Me!  Send Private Message   Edit Post      
dodge mod fixes the issue properly. crushing it is old tech and not a consistent fix.



click

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bmxr152
Member
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Galant VR-4 org Post #: 1177103 posted 06/22/14 12:55 AM     Remind Me!  Send Private Message   Edit Post      
They will also leak with a dirty sealing surface. I have taken mine off and cleaned it after a blt and no leak up to 35lbs with a dodge mod.



92 GVR4 #975-1000
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AnotherNewb
flutterdumper


Galant VR-4 org Post #: 1177208 posted 06/23/14 02:54 AM     Remind Me!  Send Private Message   Edit Post      
<~ heh, flutter dump.



Every terrorist killed is a victory for Wookalar

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EfiniX
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Galant VR-4 org Post #: 1177235 posted 06/23/14 10:46 AM     Remind Me!  Send Private Message   Edit Post      
I met with EHMotorsports yesterday and we knocked out a dodge mod BoV in about 3 hours. The result of the mod was interesting. I actually noticed I was still getting a bit of flutter at higher boost levels. This behavior abruptly stopped when I blew my recirculation hose clean off the intake. Venting to atmosphere resulted in no flutter whatsoever. My BoV hose has a nasty bend in it, the result of using too-short of a connection. I'm guessing the tight bend the hose had to make to get into the intake pipe (right after the MAF, of course) was creating just enough back-pressure to flutter the valve. I'm going to fix this today with some new hose and report back. I'm guessing this issue goes with a new dump hose.

My stock BoV


You can see the stock valve was crushed.


I noticed the VR4 board was open on Evan's shop computer. I would say his suggestion of doing the Dodge Mod was excellent advice!


Cleaned, sand-blasted, rinsed and ready for modding. Evan had a stock BoV already sitting around, so we Dodge-modded that valve and I gave him my valve to mod later.




I decided to use a cap bolt so we wouldn't have to worry about filling or filing to get a hose to seal.



Evan has a lathe, which makes drilling out the cap bolt easy and precise. I've seen people with a vice and a hand drill and I have to imagine you break a few bits and a few bolts before getting it right.


He lathed the nipple on free-hand. Definitely something he's done before.


Now to drill-out and tap the valve.




Sealing off the stock intake pressure hole


Tapping the turbo outlet


The new valve painted and installed


Turbo outlet line installed


And of course, proof that it is, indeed, blowing off



RIP 543
Ded click
2006 Suzuki SV-650 (for sale)
2011 BMW 335d (~510'lb/tq and 36mpg. hwy. How can you go wrong?)


Edited by EfiniX (06/23/14 10:54 AM)

Posts: 647 | From: portland, or | Member Since: 10/18/12 | IP: (75.164.165.221) | Report this post to a Moderator

prove_it
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Galant VR-4 org Post #: 1177238 posted 06/23/14 10:53 AM     Remind Me!  Send Private Message   Edit Post      
Nice, yea I suppose a crappy vent hose would slow the pressure release. Good call. Good to hear it's sorted out too.



#1284/2K NB, Totaled
#715/1K KG, Rebuilding
02 Acura TL daily duty unit

12yr+ Vr4 owner.
Honda/Acura master tech.
Family Guy

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GSTwithPSI
A hole
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Galant VR-4 org Post #: 1177244 posted 06/23/14 11:09 AM     Remind Me!  Send Private Message   Edit Post      
You should ditch that crusty looking MBC and just use ECMlink instead.



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prove_it
my racist jokes aren't actually funny
715/1000
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Galant VR-4 org Post #: 1177245 posted 06/23/14 11:12 AM     Remind Me!  Send Private Message   Edit Post      
^agreed. Besides the amount of time it takes to get a good boost map set-up, links boost control is really nice. I'm using the stock BCS and it works great.



#1284/2K NB, Totaled
#715/1K KG, Rebuilding
02 Acura TL daily duty unit

12yr+ Vr4 owner.
Honda/Acura master tech.
Family Guy

Posts: 4201 | From: Sioux Falls, SD | Member Since: 07/04/08 | IP: (24.230.93.110) | Report this post to a Moderator

GSTwithPSI
A hole
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Galant VR-4 org Post #: 1177250 posted 06/23/14 11:35 AM     Remind Me!  Send Private Message   Edit Post   
I had mine dialed in after about 15 min. Really not much to it.



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