Who has had problems with stock dv leaking?

jcarlucci1 · 02-12-2008, 07:54 PM

Just trying to get an idea of how many people have had problems with the stock diverter valves leaking, and at what psi?

radgator1 · 02-12-2008, 09:22 PM

You probably should have had a 3rd choice being "don't know".

jcarlucci1 · 02-12-2008, 09:52 PM

Quote:

Originally Posted by radgator1

You probably should have had a 3rd choice being "don't know".

Good point..at least I can get an idea of how many people know for sure that they're leaking..

sambonator · 02-13-2008, 01:05 AM

I have a feeling many of them do leak at higher boost, but people just don't know it. I think the stock DV's are perfectly fine for stock or mild boost.

I don't think its so much that it leaks because of boost, but it may be failing to close properly after it opens on throttle closure during shifts following high-boost, allowing a LOT of air to go through, then suddenly forced to close on high boost again... but its like it has problems shutting down the high-volume flow for a bit.

That's how my car felt anyway. And tonight, I just put in the Forge DVs. Immediate testing so far appears to have cured my strange boost issues after shifts, but I haven't done enough testing yet. I just put race gas in and now have to let it adapt a little bit. JB2H "feels" stronger to me than before, but could just be the placebo effect. JB2HR is now "on" and I'll be doing more testing later.

pat@forge · 02-13-2008, 09:19 AM

I have a suspicion that anyone that voted "NO" is incorrect.

This isn't a high boost issue really, transitions are what give OEM valves the most problems.

I think every instance of feedback on this forum for our valve kit mentions slightly increased boost levels, more stable boost curves, and increased power and response. This would strongly indicate that the OEM units are leaking.

1clean335i · 02-13-2008, 09:45 AM

One of the VIP tuning guys said his are leaking over on n54tech

jcarlucci1 · 02-13-2008, 11:35 AM

Quote:

Originally Posted by 1clean335i

One of the VIP tuning guys said his are leaking over on n54tech

Any problems losing boost with your BOV?

David1 · 02-13-2008, 11:38 AM

Quote:

Originally Posted by jcarlucci1

Good point..at least I can get an idea of how many people know for sure that they're leaking..

How do you know if they leak?

pat@forge · 02-13-2008, 11:54 AM

Quote:

Originally Posted by David1

How do you know if they leak?

That's the issue. You don't know for certain unless you replace them with valves that don't leak.

Mike@Forge · 02-13-2008, 11:59 AM

Quote:

Originally Posted by pat@forge

That's the issue. You don't know for certain unless you replace them with valves that don't leak.

...... and are suddenly making more boost (and potentially more power) than with the original (leaking) valves.

E90ice · 02-13-2008, 12:15 PM

How much do the Forge DV cost?

e90AW335i · 02-13-2008, 12:17 PM

Quote:

Originally Posted by E90ice

How much do the Forge DV cost?

http://www.e90post.com/forums/showthread.php?t=102110

Mike@Forge · 02-13-2008, 12:18 PM

Quote:

Originally Posted by e90AW335i

http://www.e90post.com/forums/showthread.php?t=102110

Beat me to it.

e90AW335i · 02-13-2008, 12:19 PM

Quote:

Originally Posted by Mike@Forge

Beat me to it.

Its all good, sending a free set my way for that?

View Poll Results: Are your stock DV's leaking under increased boost?
yes	4	23.53%
no	13	76.47%
Voters: 17. You may not vote on this poll

02-12-2008, 07:54 PM	#1
jcarlucci1 Lieutenant Colonel 64 Rep 1,642 Posts Drives: Jet Black 335i Join Date: Mar 2007 Location: Tampa iTrader: (10)	Who has had problems with stock dv leaking? Just trying to get an idea of how many people have had problems with the stock diverter valves leaking, and at what psi?
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02-12-2008, 09:22 PM	#2
radgator1 Lieutenant Colonel 50 Rep 1,600 Posts Drives: e90 335i Join Date: Aug 2006 Location: SoCal iTrader: (4) Garage List 2007 e90 335i [0.00] 2007 e90 335i [0.00]	You probably should have had a 3rd choice being "don't know".
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02-13-2008, 01:05 AM	#4
sambonator Samtaro! 125 Rep 2,601 Posts Drives: 2014 F32 N55 Alpinweiß Join Date: May 2007 Location: Newport Beach, CA, USA iTrader: (7)	I have a feeling many of them do leak at higher boost, but people just don't know it. I think the stock DV's are perfectly fine for stock or mild boost. I don't think its so much that it leaks because of boost, but it may be failing to close properly after it opens on throttle closure during shifts following high-boost, allowing a LOT of air to go through, then suddenly forced to close on high boost again... but its like it has problems shutting down the high-volume flow for a bit. That's how my car felt anyway. And tonight, I just put in the Forge DVs. Immediate testing so far appears to have cured my strange boost issues after shifts, but I haven't done enough testing yet. I just put race gas in and now have to let it adapt a little bit. JB2H "feels" stronger to me than before, but could just be the placebo effect. JB2HR is now "on" and I'll be doing more testing later. __________________
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02-13-2008, 09:19 AM	#5
pat@forge Enlisted Member 2 Rep 41 Posts Drives: Miata Join Date: Jan 2008 Location: Orlando iTrader: (0)	I have a suspicion that anyone that voted "NO" is incorrect. This isn't a high boost issue really, transitions are what give OEM valves the most problems. I think every instance of feedback on this forum for our valve kit mentions slightly increased boost levels, more stable boost curves, and increased power and response. This would strongly indicate that the OEM units are leaking.
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02-13-2008, 09:45 AM	#6
1clean335i Perf BMW mag issue 147, 159 415 Rep 6,803 Posts Drives: Project Estoril Join Date: Feb 2007 Location: Miami, FL iTrader: (31) Garage List 2013 335i M-sport [0.00] 2011 X5 xdrive35i M ... [0.00] 2009 335i M-sport [0.00] 07' 335i Sedan [0.00]	One of the VIP tuning guys said his are leaking over on n54tech __________________ '13 Estoril Blue 335i M-sport *Don't PM me!* Message me here- http://www.facebook.com/ProjectEstoril
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02-13-2008, 12:15 PM	#11
E90ice Banned 205 Rep 2,002 Posts Drives: 2008 335xi Coupe Join Date: May 2006 Location: WA iTrader: (0)	How much do the Forge DV cost? __________________
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