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What actually is a N249 delete and should i do it?

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24K views 24 replies 12 participants last post by  sferg410  
#1 ·
Title says it all really. What is a N249 delete, what does it do and should I do it?

If it is a good idea, is the a good guide anywhere on how to do with photos that work and details of any extras that are needed to complete the job?

Thanks
 
#6 ·
Short answer is don't bother deleting it. If you want it gone from on top of the rocker cover you can relocate it under the cover in front of the intake manifold or you could find somewhere else to put it.

A few lengths of silicone vacuum hose and some clips will sort it.

I've moved mine and started to tidy up the bay a little.
 
#8 ·
ProjectMick said:
Short answer is don't bother deleting it. If you want it gone from on top of the rocker cover you can relocate it under the cover in front of the intake manifold or you could find somewhere else to put it.

A few lengths of silicone vacuum hose and some clips will sort it.

I've moved mine and started to tidy up the bay a little.
Do you have a photo?
 
#9 ·
#10 ·
I havent read the link.. :eek:
but my understanding was the n249 solenoid uses the vacuum store box to smooth the transition from on boost to off boost.
Delete it and jerkier driving ,but if youre going full wellie most of the time that wont matter.
Assuming there are no hose leaks and the n249 itself is ok :lol:
 
#13 ·
Gtturbo said:
N249 reduces turbo wear whilst cruising as it opens the recirc valve and lets air bypass the turbo completely
I do know that at idle or cruising a lower that atmospheric pressure is in the manifold and also the DV vaccuum line but i doubt the pressure is low enough to pull the DV open under these conditions.

I will check it when running open dump in about 2 weeks :p
 
#14 ·
3TT3 said:
but my understanding was the n249 solenoid uses the vacuum store box to smooth the transition from on boost to off boost.
Delete it and jerkier driving ,but if youre going full wellie most of the time that wont matter.
This was my understanding too and I was considering it as I am track only full wellie or nothing in my case. Wak seems dead against it though. Others have done it and not had any problems.

Will follow this discussion with a view to possibly approaching it myself.
 
#16 ·
Delta4 said:
I deleted mine well over 3k ago as one of the small pipes cracked whilst i was doing something, the engine has'nt imploded and i have experienced zero running problems or side effects.
Do you have any engine mods like large air filter, 3" tip, forge DV etc?
 
#17 ·
sferg410 said:
Delta4 said:
I deleted mine well over 3k ago as one of the small pipes cracked whilst i was doing something, the engine has'nt imploded and i have experienced zero running problems or side effects.
Do you have any engine mods like large air filter, 3" tip, forge DV etc?
Yep, 3'' tip, k & n s2000 cone filter, standard DV, pcv delete, mapped by wak, since fitted hg motorsport FMIC and creation motorsport coldside DV relocation kit :)
 
#19 ·
Read the vag manuals to understand its function and ignore the hype on the internet, there once was a time people raved about 007p's yet everyone's realised the new latest revision stock dv is better long term and less hassle.

I recommend you drive a car with it and without it, there is no reason why a car with and without n249 should make any difference in power if all the pipework in in good order.

You'll soon see how much more turbo noise there is just at part throttle cruising around harder to hold the car at full vacuum cruising along etc.
 
#20 ·
Gtturbo said:
Read the vag manuals to understand its function and ignore the hype on the internet, there once was a time people raved about 007p's yet everyone's realised the new latest revision stock dv is better long term and less hassle.

I recommend you drive a car with it and without it, there is no reason why a car with and without n249 should make any difference in power if all the pipework in in good order.

You'll soon see how much more turbo noise there is just at part throttle cruising around harder to hold the car at full vacuum cruising along etc.
OK, so another vote for not deleting it. I am actually in the market for forge 007p so I am very interested in your point about the latest revision stock DV... can you talk a bit more about that, also how much does one cost?
 
#21 ·
The pcv system was leaking like a siv so binned it off and installed a catch can after the hockey puck, the n249 delete is simple to try out if no likey revert to oem, simply unplug the vac pipe that feeds the 249 and run a vac pipe from the manifold outlet to the DV, then make your own mind up.
 
#22 ·
sferg410 said:
Gtturbo said:
Read the vag manuals to understand its function and ignore the hype on the internet, there once was a time people raved about 007p's yet everyone's realised the new latest revision stock dv is better long term and less hassle.

I recommend you drive a car with it and without it, there is no reason why a car with and without n249 should make any difference in power if all the pipework in in good order.

You'll soon see how much more turbo noise there is just at part throttle cruising around harder to hold the car at full vacuum cruising along etc.
OK, so another vote for not deleting it. I am actually in the market for forge 007p so I am very interested in your point about the latest revision stock DV... can you talk a bit more about that, also how much does one cost?
Latest version of the OEM DV costs about ÂŁ35. and doesn't need servicing like the forge one does. Lots of folk on here with big power engines running the stock one.
 
#24 ·
The oem dv's
710J early type was supposedly the crappy one.
710N supposed to be good(the one in mine until recently)
Bosch stopped making them and Kayser I believe took over supply.
710P is the only audi suppled one now.It has guides which are supposed to keep the piston central.
The spring seems a lil weaker in my manual tests vs the 710N or maybe its just more progressive, but I have the 710P in now n it drives the same :)
'2 year guarantee with audi supplied stuff.
 
#25 ·
3TT3 said:
The oem dv's
710J early type was supposedly the crappy one.
710N supposed to be good(the one in mine until recently)
Bosch stopped making them and Kayser I believe took over supply.
710P is the only audi suppled one now.It has guides which are supposed to keep the piston central.
The spring seems a lil weaker in my manual tests vs the 710N or maybe its just more progressive, but I have the 710P in now n it drives the same :)
'2 year guarantee with audi supplied stuff.
Bonus - Thought I would just take a look at what DV is on the car and it is a 710N... :p