Down on power....

[Teutonic_Tamer]

if it is the turbo id be keen to know what caused it!! probs excessive heat as thats the only thing that can screw a turbo up isnt it?? or too much boost, but that would have probs blown then.

....But if the problem is solved without any obvious fault being visible in the turbo, how much would you be keen to pay to send it to a specialist to find out?

But surely, buy having it looked at by a specialist turbo engineer, they are very highly likely to be able to professionally report what damaged it in the first place.  If you know what caused the damage, you can then take steps to prevent the same happening again.

id look at gettin an i/c whilst the turbo is out 

....Unecessary at this stage - As I posted earlier, the logs show absolutely no problems with the stock intercooler's performance.

Until later this week, it's speculation.

I agree it is speculation, because I strongly doubt that JKM have actually tested the standard intercooler correctly and thoroughly.

In my very humble, and very independent opinion, I would strongly recommend upgrading the stock intercooler.  With all your mods, the standard cooler is just placing un-necessary restrictions and loadings on the turbo.  Why do you think that the S3 cooler is so highly rated?

[Teutonic_Tamer]

The problems I noticed was my boost would never meet requested, it would hit 1.3bar even if the ECU was requesting more, my gut feeling is that its a turbo issue or possible N75 but with the location of this on the TFSI being a right PITA its not easy to change.

Where is the N75 valve on these?

Attached to the turbo more or less - if you stretch you knee's the wrong way and look down the back left you will 'just' see small pipes coming out from it.  

So it is actually bolted into the turbo housing?  I understood that they could also be remotely mounted - or maybe I misunderstood. 

Going back to the K04 option, is this a direct bolt on option for the K03 engine like the 1.8T's - just a thought as there were quite a few options for direct bolt on replacements to the K03 a couple of years ago. Do you really need to go as far as new injectors etc etc if you dont want to extract everything from it...

Well, the turbo is actually integrated into the exhaust manifold - so in simple terms, it would just mean swapping the turbo/manifold assembly, along with the downpipe.  However, the K04 only supports the remote mounted cut off valve, so this would need to be done too.

[neg]

Robin, Just spoke to Keith (very helpful) and it all sounds very similar - we could be onto something here  

Sounds like they will inspect the turbo in-house and if there is a problem hopefully they will pick up on it.

I'll wait with interest  

KO4 would need relocation of DV + new discharge pipe but theoretically it should work as long as you limit the boost, but then you wouldn't be running K04 specific software so it wont try and hold the boost for that long anyway.

[Teutonic_Tamer]

Be useful to see any boost logs from yours to compare to mine before I go down this route!

....JKM have all the logs for my car. Their usual policy is to respect the confidentiality of the customer. However, perhaps I could give permission - I would need to speak to JKM.

The boost logs are your property.  They relate to your vehicle, and you (presumably) paid for JKM to work on your car - so they are legally obliged to hand over any paperwork, old bits, etc.

[neg]

So it is actually bolted into the turbo housing?  I understood that they could also be remotely mounted - or maybe I misunderstood. 

Not heard about relocating it - and not sure if its actually 'bolted' on but its right fiddly to get at, you can get your hand on it but not see what you are doing or have any room down there.  From underneath must be better but probably still quite fiddly as its pretty high up.

[RedRobin]

Be useful to see any boost logs from yours to compare to mine before I go down this route!

....JKM have all the logs for my car. Their usual policy is to respect the confidentiality of the customer. However, perhaps I could give permission - I would need to speak to JKM.

The boost logs are your property.  They relate to your vehicle, and you (presumably) paid for JKM to work on your car - so they are legally obliged to hand over any paperwork, old bits, etc.

....Yes, I'm only saying that they won't give my log info to a third party such as yourself or neg without my permission - They are respecting MY confidentiality - Sorry if my post wasn't clear on that.

[joesgti]

well i cant recomend the s3 cooler enough!!! turbo spools up ALOT quicker and holds boost alot better higher up in the revrange!

its one of the only mods that i could feel the difference when driving! 

[Teutonic_Tamer]

well i cant recomend the s3 cooler enough!!! turbo spools up ALOT quicker and holds boost alot better higher up in the revrange!

its one of the only mods that i could feel the difference when driving! 

Yup, I'm with you on that - though TBF, it was obviously difficult for me to tell weather it was the S3 or Forge 

[bacillus]

 it was obviously difficult for me to tell weather it was the S3 or Forge 

Or both.   

[RedRobin]

well i cant recomend the s3 cooler enough!!! turbo spools up ALOT quicker and holds boost alot better higher up in the revrange!

its one of the only mods that i could feel the difference when driving! 

....I'm not saying that the S3 i/c isn't an excellent mod, but only that JKM's logs (no, they haven't removed the stock i/c for tests - TT please note) are not indicating any issues with my stock i/c.

To feel the difference on road rather than track, Joe, I reckon you must be driving your car like you stole her - But I suggest that without the experience of driving one myself.

Whereas JKM would of course like the extra business of installing a S3 i/c, all their logging etc on my car suggests that unless I was doing trackdays, my stock i/c is doing its job, and though a great mod, it's not one I need at present.

[joesgti]

well i cant recomend the s3 cooler enough!!! turbo spools up ALOT quicker and holds boost alot better higher up in the revrange!

its one of the only mods that i could feel the difference when driving! 

....I'm not saying that the S3 i/c isn't an excellent mod, but only that JKM's logs (no, they haven't removed the stock i/c for tests - TT please note) are not indicating any issues with my stock i/c.

To feel the difference on road rather than track, Joe, I reckon you must be driving your car like you stole her - But I suggest that without the experience of driving one myself.

Whereas JKM would of course like the extra business of installing a S3 i/c, all their logging etc on my car suggests that unless I was doing trackdays, my stock i/c is doing its job, and though a great mod, it's not one I need at present.

trust me, you would know the difference. the spool up was alot slower on my car and a slight lag, now no lag whatsoever. have you got any graphs that you could post of your car on the RR? i can then compare this to some of my older ones! 

[RedRobin]

if it is the turbo id be keen to know what caused it!!

....But if the problem is solved without any obvious fault being visible in the turbo, how much would you be keen to pay to send it to a specialist to find out?

But surely, buy having it looked at by a specialist turbo engineer, they are very highly likely to be able to professionally report what damaged it in the first place.  If you know what caused the damage, you can then take steps to prevent the same happening again.

....As both you and Joe are saying, I can see the wisdom in your words. I will investigate the costs of so doing but I expect that you appreciate that even with deep pockets, there's a level of cost which makes it not worthwhile. However, I can also see how valuable such info would also be for others, including yourselves!

First, we have to actually see what we find with the turbo on Friday.

In my very humble, and very independent opinion, I would strongly recommend upgrading the stock intercooler.  With all your mods, the standard cooler is just placing un-necessary restrictions and loadings on the turbo.  Why do you think that the S3 cooler is so highly rated?

....Again, obviously first rate advice. I may very well do the S3 i/c mod but not yet.

[joesgti]

what about the graphs 

[RedRobin]

trust me, you would know the difference. the spool up was alot slower on my car and a slight lag, now no lag whatsoever. have you got any graphs that you could post of your car on the RR? i can then compare this to some of my older ones! 

....Surely you should not have experienced any noticeable lag before the S3 i/c was installed. Butt dyno? Placebo?

No time to sort out graphs, pics of, uploading etc right now - I'll post an overview when this issue is solved - I have other priorities right now.

[RedRobin]

KO4 would need relocation of DV + new discharge pipe but theoretically it should work as long as you limit the boost, but then you wouldn't be running K04 specific software so it wont try and hold the boost for that long anyway.

....Surely fitting a K04 without the rest of the package would result in turbo lag. It's swings vs roundabouts (assuming you know the expression). Need I remind anyone that the whole package costs £4K.