Another guy with another bov problem

oshusttoley · 03-11-2013, 10:34 PM

So I've done my research and found many people with having their bov not release at points but couldn't find my answer so here it goes. So I have a ER charge pipe with tial q bov. It works great but a little too quite for my taste. Anyway, sometimes when I do WOT in either 2nd,3rd or 4th and rev the rpms high before shifting to the next gear (basically flooring the crap out of it) and the bov doesn't release the pressure. Btw I have manual trans. If I floor it in 3rd, then press on clutch, no bov. Even if I do or don't shift into the next gear, no blow off. The spring is whatever came with. I have a jb4 with catless dp's and exhaust. I think I'm running around 15 or 16psi. Do I need to change the spring or what else can I do to fix this? Thanks! Btw at low rpms th bov works as supposed to.

psmitty95 · 03-11-2013, 10:35 PM

Mine does it too. I think it's normal

oshusttoley · 03-11-2013, 10:39 PM

Quote:

Originally Posted by psmitty95

Mine does it too. I think it's normal

I would think it shouldn't be normal. If I do wot in 3rd and then let go of the gas pedal to coast... All that pressure is going in the other direction of the turbos which is not good at all, specially with higher boost... This is why I am
Showing my concern.

psmitty95 · 03-11-2013, 10:42 PM

Quote:

Originally Posted by oshusttoley

I would think it shouldn't be normal. If I do wot in 3rd and then let go of the gas pedal to coast... All that pressure is going in the other direction of the turbos which is not good at all, specially with higher boost... This is why I am
Showing my concern.

oh if i let off to coast it blows off... It's when i'm shifting quick when it sometimes doesnt let off

spyre · 03-11-2013, 11:12 PM

Is the vacuum line as short and direct as possible going into the bov? If it's not seeing the change in vacuum as you let off to shift it may not fire the bov. I've always liked the HKS super sequential instead as it seems much more responsive.

oshusttoley · 03-11-2013, 11:57 PM

Quote:

Originally Posted by spyre

Is the vacuum line as short and direct as possible going into the bov? If it's not seeing the change in vacuum as you let off to shift it may not fire the bov. I've always liked the HKS super sequential instead as it seems much more responsive.

Cutting the line going into te bov shorter will make it work better? I used the line that came with the tial. And is the hks really high pitch? I wanted something low whoosh sound not really high pitch

robc1976 · 03-12-2013, 03:15 AM

Quote:

Originally Posted by oshusttoley

Cutting the line going into te bov shorter will make it work better? I used the line that came with the tial. And is the hks really high pitch? I wanted something low whoosh sound not really high pitch

I have had all 3 (Tial, Synapse & HKS) and HKS is my favorite....mine is not that high pitched had a whoosh sound and a slight high pitch at the end. I used the purple insert and did not care for it at all. The HKS is very responsive and holds boost great! l

BoostedE90 · 03-12-2013, 06:46 AM

It's normal. It's the bog fix for the JB4.

http://www.e90post.com/forums/showthread.php?t=786692

Gugs · 03-12-2013, 09:43 AM

Quote:

Originally Posted by BoostedE90

It's normal. It's the bog fix for the JB4.

http://www.e90post.com/forums/showthread.php?t=786692

Its not normal. And get rid of the G4 then.
And bogfix should be off anyway as its a joke

Mike@N54Tuning.com · 03-12-2013, 10:04 AM

The Tial is the quietest BOV for our cars, while HKS and Synapse are considerably louder.

Mike

tcw · 03-12-2013, 10:13 AM

If you push in the clutch the tune things you are going to shift into the next gear so it tries to retain boost hence the BOV not going doing it's thing. Although when you let out the clutch you should hear the "pssh".

MoTastic_2 · 03-12-2013, 11:08 AM

check Vacuum lines and also the seal on the BOV from the CP where it sits. Mine had that issue and i had replace it than no problems what so ever.

Jeff@TopGearSolutions · 03-12-2013, 11:43 AM

Quote:

Originally Posted by Gugs

Its not normal. And get rid of the G4 then.
And bogfix should be off anyway as its a joke

I love your posts.

To the OP, it should blow off if you go WOT and then get off the gas abruptly.

If its not doing that. Do some logs and check your lines for leaks, cracks, disconnects.

Does the car idle smooth? Boost Leak?

If this is really a JB4 thing that is a little weird.

Indo Rider · 03-12-2013, 01:41 PM

I'm not suggesting that this is the problem in your case, but just as a data point: When i did the intake valve cleaning recently i had the intake manifold removed and while looking it over i noticed that the nipple for the vac line going to the bov was partially blocked by some carbon buildup/dust. Don't think it was causinga problem for me, but it def had some crap in it.... Never would have thought about that until i happened to see it...

oshusttoley · 03-14-2013, 10:29 PM

Quote:

Originally Posted by Jeff@TopGearSolutions

I love your posts.

To the OP, it should blow off if you go WOT and then get off the gas abruptly.

If its not doing that. Do some logs and check your lines for leaks, cracks, disconnects.

Does the car idle smooth? Boost Leak?

If this is really a JB4 thing that is a little weird.

will do logs this weekend and post em up here...checked for leacks...none (which is good lol)

Toda Party · 03-28-2013, 02:21 AM

just curious, what spring pressure is the bov?

03-11-2013, 10:34 PM	#1
oshusttoley Captain 46 Rep 676 Posts Drives: 2008 335i sedan Join Date: Mar 2012 Location: New Jersey iTrader: (0)	Another guy with another bov problem So I've done my research and found many people with having their bov not release at points but couldn't find my answer so here it goes. So I have a ER charge pipe with tial q bov. It works great but a little too quite for my taste. Anyway, sometimes when I do WOT in either 2nd,3rd or 4th and rev the rpms high before shifting to the next gear (basically flooring the crap out of it) and the bov doesn't release the pressure. Btw I have manual trans. If I floor it in 3rd, then press on clutch, no bov. Even if I do or don't shift into the next gear, no blow off. The spring is whatever came with. I have a jb4 with catless dp's and exhaust. I think I'm running around 15 or 16psi. Do I need to change the spring or what else can I do to fix this? Thanks! Btw at low rpms th bov works as supposed to. __________________ // JB4 ISO // Running Meth // Full FBO // E85 user //
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03-11-2013, 10:35 PM	#2
psmitty95 Brigadier General 580 Rep 4,393 Posts Drives: '23 M340i xDrive Join Date: Jan 2012 Location: Boston, MA iTrader: (11)	Mine does it too. I think it's normal __________________ < Click picture for photoshoot E90 335i xDrive 6spd, Nav, Prem, Cold Weather, & Sports package - Msport Conversion Mods: JB4 + MHD, Doc Race ST, Pure 6266, AD-Eng PI/Mounts, Fuel-It st. 3, Custom Exhaust, Tuned by TwistedTuning More Pictures: Build Thread /// 683AWHP/675AWTQ
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03-11-2013, 11:12 PM	#5
spyre New Member 6 Rep 29 Posts Drives: 2010 e92 335i M-Sport 6MT Join Date: Jan 2013 Location: San Diego iTrader: (0)	Is the vacuum line as short and direct as possible going into the bov? If it's not seeing the change in vacuum as you let off to shift it may not fire the bov. I've always liked the HKS super sequential instead as it seems much more responsive.
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03-12-2013, 06:46 AM	#8
BoostedE90 Lieutenant Colonel 55 Rep 1,690 Posts Drives: e90 335i 6MT Join Date: Nov 2007 Location: Tampa/Gainesville, FL iTrader: (5)	It's normal. It's the bog fix for the JB4. http://www.e90post.com/forums/showthread.php?t=786692
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03-12-2013, 10:04 AM	#10
Mike@N54Tuning.com Joint Chiefs of Staff 4920 Rep 115,999 Posts Drives: 2007 335i, 2015 M3 Join Date: Dec 2008 Location: N54tuning.com iTrader: (89)	The Tial is the quietest BOV for our cars, while HKS and Synapse are considerably louder. Mike
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03-12-2013, 10:13 AM	#11
tcw Captain 52 Rep 748 Posts Drives: 2008 335i Join Date: Jan 2012 Location: Atlanta, GA iTrader: (2)	If you push in the clutch the tune things you are going to shift into the next gear so it tries to retain boost hence the BOV not going doing it's thing. Although when you let out the clutch you should hear the "pssh". __________________ 2008 335I E92, AW, VFF700, 18" Forgestar F14, M3 front/side, M-tech rear, AMS IC, H&R Touring Cup Kit suspension, HID AE, ER Charge Pipe & Synapse BOV, CIC Retrofit, Quafie, DSS, Defiv Lockdown, SPEC 2+/Steel SMFW, Walbro 450
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03-12-2013, 11:08 AM	#12
MoTastic_2 Private First Class 17 Rep 171 Posts Drives: BMW Man Join Date: Mar 2013 Location: Arlington, TX iTrader: (0)	check Vacuum lines and also the seal on the BOV from the CP where it sits. Mine had that issue and i had replace it than no problems what so ever.
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03-12-2013, 01:41 PM	#14
Indo Rider Captain 555 Rep 739 Posts Drives: 135 Join Date: Apr 2012 Location: United States iTrader: (0)	I'm not suggesting that this is the problem in your case, but just as a data point: When i did the intake valve cleaning recently i had the intake manifold removed and while looking it over i noticed that the nipple for the vac line going to the bov was partially blocked by some carbon buildup/dust. Don't think it was causinga problem for me, but it def had some crap in it.... Never would have thought about that until i happened to see it...
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03-28-2013, 02:21 AM	#16
Toda Party Private 6 Rep 66 Posts Drives: E90, EM1, CBR Join Date: Mar 2013 Location: United States iTrader: (2)	just curious, what spring pressure is the bov? Last edited by Toda Party; 03-28-2013 at 02:29 AM..
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