2 PSI drop after forge DV install.

335iLI · 09-20-2010, 09:03 AM

I have searched the forums and have installed and reinstalled these several times and i just am not holding boost like my stock dvs did. Could it be the vacum line that goes to the dvs ? If its leaking from the T could that cause boost leak and some lag ? I am sure these are installed correctly just wondering if anyone else experienced this. Maybe i missed something. Thanks for your help

cn555ic · 09-20-2010, 09:15 AM

2psi drop is alot for sure...there has to be a leak...Make sure the grey clips are in the locking position. Any boost leak will effect the performance and the lag your feeling is probably the leak causing the turbos not to spool up fast enough.

335iLI · 09-20-2010, 09:29 AM

Quote:

Originally Posted by cn555ic

2psi drop is alot for sure...there has to be a leak...Make sure the grey clips are in the locking position. Any boost leak will effect the performance and the lag your feeling is probably the leak causing the turbos not to spool up fast enough.

checked the clips im sure they are correct

beta17 · 09-20-2010, 09:41 AM

what's about the installed springs?

335iLI · 09-20-2010, 09:51 AM

Quote:

Originally Posted by beta17

what's about the installed springs?

i have the yellow ones in like everybody else

Kevin@AKMotorwerk · 09-20-2010, 09:55 AM

you didnt pull the orings out of the charge pipe where the dv's go in did you?

335iLI · 09-20-2010, 09:59 AM

Quote:

Originally Posted by Kevin@AKMotorwerk

you didnt pull the orings out of the charge pipe where the dv's go in did you?

no i didnt was i supposed to ?

Kevin@AKMotorwerk · 09-20-2010, 10:05 AM

Quote:

Originally Posted by 335iLI

no i didnt was i supposed to ?

no they stay there, just make sure somehow they didnt stick to the stock dv's, its a longshot, and doubt thats the case, but its worth the look

335iLI · 09-20-2010, 10:07 AM

Quote:

Originally Posted by Kevin@AKMotorwerk

no they stay there, just make sure somehow they didnt stick to the stock dv's, its a longshot, and doubt thats the case, but its worth the look

just looked and they didnt thank you though. Do you think a leak in the vacum line could cause a drop in psi and a leak ?

Kevin@AKMotorwerk · 09-20-2010, 10:10 AM

Quote:

Originally Posted by 335iLI

just looked and they didnt thank you though. Do you think a leak in the vacum line could cause a drop in psi and a leak ?

yea its very possible, check your lines again, maybe zip tie any questionable vacuum hose fittings. also check the silicone recirculation hoses too, sometimes with stett chargepipes the hoses are a tiny bit too short and if it was left uncorrected it would cause a leak, normally the back one under the cowl is the problem one.

cn555ic · 09-20-2010, 10:10 AM

I hope wheh you changed out the DV boost hoses that you didn't yank at them because alot of people crack the nipple at manifold from pulling at it.! Check the nipple on the manifold to see if its cracked...You better hope its not cracked because its a very expensive fix....

Here is the location of that nipple...pulling and tugging the DV hoses will in fact crack that nipple and if its not completely cracked off it will leak for sure..
http://www.e90post.com/forums/showthread.php?t=263214

themyst · 09-20-2010, 10:11 AM

Make sure the dvs are greased properly and verify no vacuum leaks also

335iLI · 09-20-2010, 10:15 AM

Quote:

Originally Posted by cn555ic

I hope wheh you changed out the DV boost hoses that you didn't yank at them because alot of people crack the nipple at manifold from pulling at it.! Check the nipple on the manifold to see if its cracked...You better hope its not cracked because its a very expensive fix....

Here is the location of that nipple...pulling and tugging the DV hoses will in fact crack that nipple and if its not completely cracked off it will leak for sure..
http://www.e90post.com/forums/showthread.php?t=263214

I will look into this hopefully i didnt muscle it to much.

335iLI · 09-20-2010, 10:16 AM

Quote:

Originally Posted by themyst

Make sure the dvs are greased properly and verify no vacuum leaks also

i greased them good. will check vacum hoses thank you

cn555ic · 09-20-2010, 10:18 AM

Quote:

Originally Posted by 335iLI

I will look into this hopefully i didnt muscle it to much.

It doesn't take too much muscle...there is not alot of slack in the hoses and any slight jerk to wiggle out the hose from the OEM DVs can cause the plastic nipple to rip off...I hope its not the case but that situation comes to mind when I tried to diagnose your problem...I hope I am wrong..

themyst · 09-20-2010, 10:23 AM

I actually went back to stock DVs after all the maintenance the Forge DVs required. They hold boost perfectly fine and I push up to 18psi at times. Personally I think they're a waste.

335iLI · 09-20-2010, 10:43 AM

Quote:

Originally Posted by themyst

I actually went back to stock DVs after all the maintenance the Forge DVs required. They hold boost perfectly fine and I push up to 18psi at times. Personally I think they're a waste.

im thinking of doing this to

335iLI · 09-20-2010, 12:36 PM

Quote:

Originally Posted by 335iLI

im thinking of doing this to

so i tightened everything up and went out and did some runs my boost hit 15.9 but mostly stayed around 15.3 im fully catless ic and procede. i wonder if thats where my car wants to run or if i have a leak

themyst · 09-20-2010, 12:45 PM

sounds about right for 93 octane, Procede autotuned me to 15.6 boost, 31ic on 93octane fmic, dps, dci.

This was when I took my meth kit out

Sevak - Deleted User · 09-20-2010, 02:34 PM

What maintenance do the Forge DVs require?

If you want to sell your DV´s send me a PM.

335iLI · 09-20-2010, 02:53 PM

Quote:

Originally Posted by themyst

sounds about right for 93 octane, Procede autotuned me to 15.6 boost, 31ic on 93octane fmic, dps, dci.

This was when I took my meth kit out

what were the outside air temps i think my ic was at 60 today

themyst · 09-20-2010, 02:54 PM

Quote:

Originally Posted by 335iLI

what were the outside air temps i think my ic was at 60 today

low 90's, I created a whole thread on differences in fuel quality. Gulf 93 octane FTW, Sunoco 93 octane FTL is what I found.

09-20-2010, 09:03 AM	#1
335iLI Captain 34 Rep 634 Posts Drives: 335i Join Date: Nov 2009 Location: NY-LI iTrader: (5)	2 PSI drop after forge DV install. I have searched the forums and have installed and reinstalled these several times and i just am not holding boost like my stock dvs did. Could it be the vacum line that goes to the dvs ? If its leaking from the T could that cause boost leak and some lag ? I am sure these are installed correctly just wondering if anyone else experienced this. Maybe i missed something. Thanks for your help
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09-20-2010, 09:15 AM	#2
cn555ic 441 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	2psi drop is alot for sure...there has to be a leak...Make sure the grey clips are in the locking position. Any boost leak will effect the performance and the lag your feeling is probably the leak causing the turbos not to spool up fast enough.
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09-20-2010, 09:41 AM	#4
beta17 Private First Class 20 Rep 168 Posts Drives: E92 335i Coupé M-Tech Join Date: Apr 2009 Location: Zurich iTrader: (1)	what's about the installed springs? __________________ STOCK
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09-20-2010, 09:55 AM	#6
Kevin@AKMotorwerk General 290 Rep 28,154 Posts Drives: THE GUY YOU LOVE TO HATE Join Date: Mar 2009 Location: hillsborough, nj iTrader: (1)	you didnt pull the orings out of the charge pipe where the dv's go in did you?
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09-20-2010, 10:10 AM	#11
cn555ic 441 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	I hope wheh you changed out the DV boost hoses that you didn't yank at them because alot of people crack the nipple at manifold from pulling at it.! Check the nipple on the manifold to see if its cracked...You better hope its not cracked because its a very expensive fix.... Here is the location of that nipple...pulling and tugging the DV hoses will in fact crack that nipple and if its not completely cracked off it will leak for sure.. http://www.e90post.com/forums/showthread.php?t=263214
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09-20-2010, 10:11 AM	#12
themyst Major General 177 Rep 6,631 Posts Drives: '16 MK7 GTI Join Date: Feb 2009 Location: NYC iTrader: (8)	Make sure the dvs are greased properly and verify no vacuum leaks also __________________ E90 LCI N54 6AT
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09-20-2010, 10:23 AM	#16
themyst Major General 177 Rep 6,631 Posts Drives: '16 MK7 GTI Join Date: Feb 2009 Location: NYC iTrader: (8)	I actually went back to stock DVs after all the maintenance the Forge DVs required. They hold boost perfectly fine and I push up to 18psi at times. Personally I think they're a waste. __________________ E90 LCI N54 6AT
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09-20-2010, 12:45 PM	#19
themyst Major General 177 Rep 6,631 Posts Drives: '16 MK7 GTI Join Date: Feb 2009 Location: NYC iTrader: (8)	sounds about right for 93 octane, Procede autotuned me to 15.6 boost, 31ic on 93octane fmic, dps, dci. This was when I took my meth kit out __________________ E90 LCI N54 6AT
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09-20-2010, 02:34 PM	#20
Sevak - Deleted User Private First Class 16 Rep 156 Posts Drives: Bmw 135i Join Date: Dec 2008 Location: Denmark iTrader: (1)	What maintenance do the Forge DVs require? If you want to sell your DV´s send me a PM.
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