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Model specific boards => Golf mk5 => Topic started by: RedRobin on 24 October 2008, 00:15
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I went on JKM's Dyno-Dynamics today (Friday) and whereas the torque was sharper, the power still max'd at 228 bhp - So still very close to the last two sessions. However, without the pressure of getting over 20 other cars onto the rollers, we had time to check data logs and found that the problem is a boost leak.
We just need to find it and so the car is booked in again next Friday.
:cool:
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Mixed news then Robin!
You know the car ain't performing :sad: but at least you know why :smiley:
Also it probably will be something fairly simple and hopefully not expensive :undecided:
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Just the time to upgrade to the much more durable S3 intercooler! :wink: :tongue: :grin:
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If you've been running the Forge valve for quite some time it may well want a service.
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Mixed news then Robin!
You know the car ain't performing :sad: but at least you know why :smiley:
Also it probably will be something fairly simple and hopefully not expensive :undecided:
....A feeling you've had experience of!! :grin:
Happy Birthday Yesterday!! I got back late last night.
:afro:
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Just the time to upgrade to the much more durable S3 intercooler! :wink: :tongue: :grin:
....Stoppit!!
I gotta do my suspension first - Well, after sorting out the boost leak.
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you know you need one :grin:
(http://i34.photobucket.com/albums/d122/mat138l/s3icinstall010.jpg)
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Matt I know this is a topic about RedRobin but is your grill surround going pink??? :wink:
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Matt I know this is a topic about RedRobin but is your grill surround going pink??? :wink:
:kiss: no its light bouncing from the flash :tongue:
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Just the time to upgrade to the much more durable S3 intercooler! :wink: :tongue: :grin:
you know you need one :grin:
....I need to know why an S3 intercooler is needed to solve boost leaks :undecided:
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Matt I know this is a topic about RedRobin but is your grill surround going pink??? :wink:
Its not really of topic bacillus RedRobin is known for a pink oem look. :laugh:
good news about the car RR back to full health soon. :smiley:
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good news about the car RR back to full health soon. :smiley:
....Cheers! :afro:
Meanwhile I'm driving around in D-mode like a granny and doing 32 mpg :shocked:
As she is nudging 230 bhp with the leak, it should be interesting to see how that changes. Each of the 3 JKM dyno sessions over the last 3 months have been extremely close in their results.
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out of interest where were you loosing boost from??
or will you find that out next week?
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Robin, i had the same problem, car would not boost over 12psi,
mine was on the dv, the pipes that come off the forge dv may have corroded and split causing lots of boost leak, if you jack the front of yo8r car up and crawl under to the dv area, look at the pipes, you should know straight away if they have split! HTH :smiley:
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out of interest where were you loosing boost from??
or will you find that out next week?
....We got as far as checking the PCV (a common boost loss area) but it's ok.
More time needed on the ramp at JKM next week.
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out of interest where were you loosing boost from??
or will you find that out next week?
....We got as far as checking the PCV (a common boost loss area) but it's ok.
More time needed on the ramp at JKM next week.
fingers crossed then :smiley:
i'm missing some BHP like you - my torque is spot on though - damn annoying!!
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Robin, i had the same problem, car would not boost over 12psi,
mine was on the dv, the pipes that come off the forge dv may have corroded and split causing lots of boost leak, if you jack the front of yo8r car up and crawl under to the dv area, look at the pipes, you should know straight away if they have split! HTH :smiley:
....The Forge DV is definitely our next area to check but my boost gauge can still peak 21 - The loss is such that the turbo is having to work harder - Hence why I'm taking it easy in D-mode all the time.
She's running like a Stage1 car instead of a Stage2.
Cheers for your suggestions but I'm useless at such things and will leave it to the experts to check out. I'm capable of checking my tyres and fluid levels and that's about it!! :rolleyes: :grin:
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out of interest where were you loosing boost from??
or will you find that out next week?
....We got as far as checking the PCV (a common boost loss area) but it's ok.
More time needed on the ramp at JKM next week.
Glad to here your well on your way to getting it sorted Robin :afro:
It would be good to see RED back to full strength to show the overweight and less-agile R32 boys a thing or two at Weston next weekend? :grin: :grin:
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i'm missing some BHP like you - my torque is spot on though - damn annoying!!
....Is this recent? What are you doing to investigate - Looking for a leak? Did you data log any info to find out?
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i'm missing some BHP like you - my torque is spot on though - damn annoying!!
....Is this recent? What are you doing to investigate - Looking for a leak? Did you data log any info to find out?
only had it on the rollers once (JKM rolling road day) since i had it mapped in January. Custom Code qoute 170bhp and 280lbs ft torque - the torque i reached but not until 2600rpm
i've done 4 full throttle runs in 4th and noticed that at 1700rpm my MAF and intake pressure are well below the specs yet from then on i pull over and above what the ECU is requesting
:undecided:
its awkward getting someone to look at it as there aren't any decent tuners / VW garages near me and the nearest CC agent is 80 miles away!
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only had it on the rollers once (JKM rolling road day) since i had it mapped in January. Custom Code qoute 170bhp and 280lbs ft torque - the torque i reached but not until 2600rpm
i've done 4 full throttle runs in 4th and noticed that at 1700rpm my MAF and intake pressure are well below the specs yet from then on i pull over and above what the ECU is requesting
:undecided:
its awkward getting someone to look at it as there aren't any decent tuners / VW garages near me and the nearest CC agent is 80 miles away!
....JKM are about 90 miles away from me but I have lots of free time. It just needs someone who knows what to look for and how to fix it - Easier said than done!
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It just needs someone who knows what to look for and how to fix it - Easier said than done!
all too true sadly!! :sad:
i'm confident its not a big problem as i'd be loosing performance throughout the rev range but i'm not :smiley:
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Glad to here your well on your way to getting it sorted Robin :afro:
....Cheers, Steve :afro:
It would be good to see RED back to full strength to show the overweight and less-agile R32 boys a thing or two at Weston next weekend? :grin: :grin:
....I won't be at JKM until Friday (the day before Weston), so I think I'll have to cancel :sad: - I'll contact them and explain my situation.
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i'm confident its not a big problem as i'd be loosing performance throughout the rev range but i'm not :smiley:
....Same here, but you need to watch that your turbo isn't overstressed.
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did you not read my reply?? :smiley:
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did you not read my reply?? :smiley:
....Did you mean me, joe? - I did read it and my intention was to thankyou but tell you how 'useless' I was at getting under cars.
:afro:
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Robin,
Tell Jim to take the boost gauge piping off at the Forge 3 port sender thingy..then do a run.
Just to rule out a leak in the boost pipe routing anyway.
Good luck and hope u find the leak.
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Robin,
Tell Jim to take the boost gauge piping off at the Forge 3 port sender thingy..then do a run.
Just to rule out a leak in the boost pipe routing anyway.
Good luck and hope u find the leak.
....Cheers for the tip :afro:
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Would you be able to tell you had a boost leak from the VAG-COM? I'm thinking of getting one and it would be another reason to go ahead if I could check fault codes for things like this, as I have spent time and money getting my car into in current state of tune and don't want it slowly loosing power through soemthing like this.
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Would you be able to tell you had a boost leak from the VAG-COM? I'm thinking of getting one and it would be another reason to go ahead if I could check fault codes for things like this, as I have spent time and money getting my car into in current state of tune and don't want it slowly loosing power through soemthing like this.
im pretty sure you can test boost on Vag com and therefore spot a problem if there is one
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Would you be able to tell you had a boost leak from the VAG-COM? I'm thinking of getting one and it would be another reason to go ahead if I could check fault codes for things like this, as I have spent time and money getting my car into in current state of tune and don't want it slowly loosing power through soemthing like this.
....Someone who knows about VAG-COM will be able to answer this.
In my case all the info came up during the Dyno-Dynamics runs as columns of data in numerical value format. In knowing what values should have logged, JKM's Keith was able to see that certain values weren't being achieved and consequently the most likely cause would be a boost leak.
Btw, I was in Cardiff last week - Lovely city and environment! I hadn't been there before. My daughter is now very keen on going there to study. :afro:
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Would you be able to tell you had a boost leak from the VAG-COM? I'm thinking of getting one and it would be another reason to go ahead if I could check fault codes for things like this, as I have spent time and money getting my car into in current state of tune and don't want it slowly loosing power through soemthing like this.
....Someone who knows about VAG-COM will be able to answer this.
In my case all the info came up during the Dyno-Dynamics runs as columns of data in numerical value format. In knowing what values should have logged, JKM's Keith was able to see that certain values weren't being achieved and consequently the most likely cause would be a boost leak.
Btw, I was in Cardiff last week - Lovely city and environment! I hadn't been there before. My daughter is now very keen on going there to study. :afro:
JKM is where I had my mods done by Keith also, he did run through the tech explanation at the time with data shown on his lap top.
Btw, yes Cardiff is a nice place, a place big not to big and not too small for my liking.
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Cardiff rules :cool:
with VAG COM you can measure the Actual intake pressure against specified which i believe is what you need :undecided:
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I don't know if this helps, but the boost pipes are exactly the same design as used on my old 150PD MKIV. Push on pipe with an O ring, 2 ears and a U shaped clip that secures them. They're nice and tight when you check them, but as you push boost through, they "pull" away from the female end, bending the clip and let boost escape.
Might be worth a look?
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One of the most obvious indications of a boost leak is the N75 duty cycle, if yours it's up in the 90's then your turbo is working very hard and it might lead you to think you have a leak.