DV relocation???

Hi there, I am a new member and have found this forum very useful. Just have 2 questions if anyone could help would be great.
1, my car has excessive lag of the line for a stock B5. I asume its the DV and would be replacing it soon, would you agree?
2, I have searched and did not see anyone swapping the DV around with the valve on top of it. My theory in doing so would give more room to use other DV's and room to adjust if need be. Has anyone tried this and could you see if there is going to be a problem?
Cheers

What are you trying to say? you want to relocate your dv to the top of the engine?  I dont think it would work very well and would probable give you even more lag.

I figured while I replace the DV I may as well replace it in the top position for easy future access, but were not sure what problems may arrise. And not sure if the valves are interchangable. Are the tubular sizes the same on both the valves?

both valves ?

any turbo car will have lag off the line... just launch higher in the rpm's

If you buy a nice valve, you'll never touch it again. It's not worth your time to think about considering relocating it.

I am thinking you think that a DV is the same as a BOV by your statement about adjusting it. A DV is NOT a BOV. You can't adjust a DV (unless you are just putting different springs it it depending on what valve it is).

Josh

After replacing the DV the first time you know what your doing. I can take mine out, grease it, change the spring, and have it back in under 5 minutes. Considering all the time it would take to relocate it and how it would probably make things worse I wouldn't worry about it

Thanks for the advice, I'll prob just swap a 710n in and leave it at that.

yeh, I wouldn't even try to move it. It would be senseless.  When I removed the DV setup in mine I moved the BOV to the intake side of the car though.  So if you decide to remove the DV setup entirely, you might want to consider that.   I tell you what, full boost, then switching gears is much smoother when a BOV is on the intake manifold side of the car.

quote:

ORIGINAL: pimphell

yeh, I wouldn't even try to move it. It would be senseless. 

 
I guess someone missed dv/bov class.  The closer to the TB the better the valve functions.  It reduces respool time, decrease the chance of surge, and the cooler air has less effect on a diaphram valve (ie 710n).
 
 

quote:

ORIGINAL: cincyTT

quote:

ORIGINAL: pimphell

yeh, I wouldn't even try to move it. It would be senseless. 

I guess someone missed dv/bov class.  The closer to the TB the better the valve functions.  It reduces respool time, decrease the chance of surge, and the cooler air has less effect on a diaphram valve (ie 710n).

HAHA owned. JK

Josh

But. why move DV if a BOV would be a better addition???  I would rather have a open apmosphere BOV by the intake instead of a DV.  Kinda pointless?  Unless you wanted to recirrculate for some reason?

and reduces spool time......not so much on this car as on others.  the stock dv just blows air back in the intake tube at a down-ward angle instead of into the turbo?  I don't know about that being so "efficent".  seems like it would disrupt the flow of air into the turbo.  The open amptophere allows the air on the intake side to be discharged so that the new charged air flows faster and also has no disruption on the shift.  ????? so....?????

How would a bov be a better addition?  They both do the same thing.  Not to mention not everyone wants the attention.

quote:

ORIGINAL: pimphell

But. why move DV if a BOV would be a better addition???  I would rather have a open apmosphere BOV by the intake instead of a DV.  Kinda pointless?  Unless you wanted to recirrculate for some reason?

 
 
http://audiforums.com/m_14128/tm.htm
 
The Audi turbo system is a closed loop system by which all unused boost that is spooled during off throttle and gear shifts must be re-routed within the system; it cannot be vented to the atmosphere due to the dependence on the MAF and ECU to properly read and interpret air flow dynamics within the intake tract. Therefore BOV's (Blow-Off Valves) are not used because they create a rich air/fuel condition (i.e. less air to fuel ratio) which will damage the catalytic converter, create soot on the exhaust pipes, and cause occasional misfiring (due to the purged air) which will result in ECU miscalculated timing adjustments and other errors.

Now I think that we are getting into theroy"s" on DV setups and BOV setups

quote:

ORIGINAL: Audi311

quote:

ORIGINAL: pimphell

But. why move DV if a BOV would be a better addition???  I would rather have a open apmosphere BOV by the intake instead of a DV.  Kinda pointless?  Unless you wanted to recirrculate for some reason?

http://audiforums.com/m_14128/tm.htm

The Audi turbo system is a closed loop system by which all unused boost that is spooled during off throttle and gear shifts must be re-routed within the system; it cannot be vented to the atmosphere due to the dependence on the MAF and ECU to properly read and interpret air flow dynamics within the intake tract. Therefore BOV's (Blow-Off Valves) are not used because they create a rich air/fuel condition (i.e. less air to fuel ratio) which will damage the catalytic converter, create soot on the exhaust pipes, and cause occasional misfiring (due to the purged air) which will result in ECU miscalculated timing adjustments and other errors.

 
Did you know that ECU's are capable of re-learning?

^ you are just blowing smoke now
 

quote:

ORIGINAL: Audi311

http://audiforums.com/m_14128/tm.htm

The Audi turbo system is a closed loop system by which all unused boost that is spooled during off throttle and gear shifts must be re-routed within the system; it cannot be vented to the atmosphere due to the dependence on the MAF and ECU to properly read and interpret air flow dynamics within the intake tract. Therefore BOV's (Blow-Off Valves) are not used because they create a rich air/fuel condition (i.e. less air to fuel ratio) which will damage the catalytic converter, create soot on the exhaust pipes, and cause occasional misfiring (due to the purged air) which will result in ECU miscalculated timing adjustments and other errors.

 
That is full of bunk when used with a correct bov.  I have shown that 100+ times now

quote:

ORIGINAL: cincyTT

Not to mention not everyone wants the attention.

BOV's for noise are for ri---- jk I won't finish that.

Audi311, if you do a split, your car can run just fine. Plus, it's not like if you run a BOV on an a4, it'll break within a day. Not even a week. ****, not even within a year will you start to notice things go wrong. It takes a very long time for your car to build up these problems that you're talking of.

Those aren't my words...I just took them from another post =p
 
I'm still an Audi n00b

It's cool. I wasn't trying to be mean, but it really does take a while for the direct airdump to have an affect on your car.

People can argue otherwise, but one of my friends ran a BOV on his car for years, and nothing bad happened.

Here you go fellas. This be what it looks like. I just got it done and so far I can tell a slightly quicker spool.
I will have to let you know if it helps keep things cooler on a hot day.

Very nice, where did you get that split pipe?

Ebay sells turboxs bov pipes that will work.  They are 1.25" so it will take some modding to work with a 1" dv. 
 
Looks good Bishop.
Just do me a favor and get rid of that zip tie.  If you need to pin the return out of the way, do it out of sight.  As for the temp, its not going to change anything but the heat the dv sees.  Once it goes back to the intake, it will go right back to the same temp as the incoming air.

I am a project engineer for a large mechanical contractor, so I just had the guys fab me up a pipe. Took them about 8 minutes.
It's actually schedule 40 fire sprinkler pipe. It can handle 175psi