MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: GTI-Ross on April 27, 2014, 10:38:18 pm
-
Hey up fellas,
Thought I would get some use out of my VAG-COM today. Decided to pop out and do some quick 3rd gear pulls, unfortunately I couldn't get a clean pull to the redline before it started to rain, but this graph gives a good idea what its requesting and what im getting, or in this case what im not getting...
Floored it at around 3100 RPM.
Its a MK6 GTI Revo Stage1 - Is it down to an OEM HPFP why its not making specified amount? All info welcome
Thanks
*Edit - N75 and another boost graph on page 2*
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fk489%2Frocketrossuk%2F17f0d02452a6a3f709616e6142b66318_zps9d1c17f9.png&hash=a50ef31ee250ac134d01b07b96cef9bc31b7c060)
-
Boost leak?
-
Boost leak?
DV and all pipes are fine. PCV valve was changed about 2 months ago. Hard to see it been that. Any other ideas?
What the max boost its should be able to hold for a period of time. Dont get me wrong it pulls hard for a stage 1 - 276bhp.
-
Have you checked the pipe that joins the turbo to the intercooler?
It's common for this to leak, and it's a cheap fix. Look for an oily mark on the undertray beneath it.
Other than that I'm out of ideas. Could be a small crack in the turbine housing, but that is unlikely
-
Have you checked the pipe that joins the turbo to the intercooler?
It's common for this to leak, and it's a cheap fix. Look for an oily mark on the undergrad beneath it.
Other than that I'm out of ideas. Could be a small crack in the turbine housing, but that is unlikely
No i havent checked that, you got a picture or a part number please?
Do you think it should match the requested boost and keep matching all the way on stock parts?
-
Part for the ED30 is here: http://www.mk5golfgti.co.uk/forum/index.php/topic,81510.0.html
Not sure if it's the same for the mk6 though.
It's at the left side of the engine by the alternator :happy2:
-
Part for the ED30 is here: http://www.mk5golfgti.co.uk/forum/index.php/topic,81510.0.html
Not sure if it's the same for the mk6 though.
It's at the left side of the engine by the alternator :happy2:
yeah, i will deffo check that out. Just need to find out if its the same part number for MK6. Cheers bro
-
I think its just due to the fact the revo is mapped aggressively to maximise power delivery in any car. They request more boost then cars can generally produce. If you have dynoed the car with great numbers, theres nothing to worry about.
What are your boost-timing-fuel settings? Usually these are setup, so that the gap between request and delivery is as small as possible. This way you will get all the boost you can, without the car trying to push extra. I would drop the boost down a bit.
-
Log it again with the N75.
-
Log it again with the N75.
what does N75 show? is that MB 114?
Thanks
-
duty cycle % i think.
-
Log it again with the N75.
what does N75 show? is that MB 114?
Thanks
Block 118
-
i had the same problem, checked and changed usual parts, I did notice a different smell from the exhaust(burnt) , renewed full exhaust system problem solved, cut up the downpipe, one of the cats was damaged
-
How do you do a log like this with vag com?
-
Log it again with the N75.
what does N75 show? is that MB 114?
Thanks
Block 118
What does it measure that 115 doesnt, and what can i gain from the data, thanks
-
It logs n75 duty cycle. The higher the number the harder the turbo is working to meet specified boost. It's quite useful to detect leaks as when the duty cycle numbers are higher than what is deemed normal something's leaking.
-
So went out tonight and did two N75 runs, both look very different. First one look pretty bad as it drops all the way down to 63.5% but then the second one looks pretty decent. Can anyone shed any light what might be going on. Both 3rd gear pulls to redline (approx)
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fk489%2Frocketrossuk%2Fcae96eb3057e91fe5db93771a90145d1_zps8277d6ed.png&hash=d78415576676db82762f52e2343c9f27250505d8)
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fk489%2Frocketrossuk%2F58a3485b028a17fb2516c0a245a5c0f9_zps93789bb6.png&hash=6fa709bbcb4247c8c1e3111ed9100bca3aab9535)
-
Correct me if I'm wrong but it should never be 100% that means the turbo is working as hard as it can...
I was always under the impression that a duty cycle of around 75-80% under full throttle should be what you have..? That was when it came to diesels however.
-
Correct me if I'm wrong but it should never be 100% that means the turbo is working as hard as it can...
I was always under the impression that a duty cycle of around 75-80% under full throttle should be what you have..? That was when it came to diesels however.
It should be @ 100% till it hits needed value and then should try to maintain (85%-95%). but both logs are very different. Here is the boost log, Requested vs actual for second graph shown in PSI. Wierd?
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fk489%2Frocketrossuk%2Fb833de3eaca659016b259672e991c5c7_zps263ff2c6.png&hash=d05414f47a7b673b8545b723fe537e3c1ab130a0)
-
Maybe take it to a tuner who can do some live logging and diagnostics..
-
Maybe take it to a tuner who can do some live logging and diagnostics..
Wish there was a decent VAG Tuner in my area. Anyways, im going to order the intercooler pipe seal / gasket and see if that fixes it, then go from there :confused:
-
Where are you Ross?
-
Where are you Ross?
Bradford / Leeds mate.
-
Any further forward yet Ross?
-
Any further forward yet Ross?
Not really yet, my VW garage (who are decent fella's) are going to look at it next week, see if they can spot an boost obvious leak. For me its got to be the DV, Intercooler seals or the N75 valve. Im going to run a few more Boost vs N75 logs tonight.
I was under the car yesterday and took this photo. There is sh*t ton of oil here, which would generally mean a duff DV, but I only replaced it about 2 months ago with revision G valve. I cant see where else the oil would come from. I just hope its not coming from the turbo its self. I mean the car still boost decent, just not matching the high request
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fk489%2Frocketrossuk%2Fa0d5b72d-fa1f-4650-8fbf-f2ed4a1ab5f2_zps30e07536.jpg&hash=4d4abf427eb9814c4ff405a152e8e85a41f54d29)
-
Nothing worse than something niggling hope it's something simple if it's leaking from dv is it possible it's leaking where the two join mibby the rubber gasket on the dv?
-
Did another 3 Runs tonight and logged. It seems to be making close to requested Boost now, (which is strange as it was quite so way off the other day) but the N75 shouldn't be going to 100% as often as this....so weird :confused:
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fk489%2Frocketrossuk%2F1A_zps287904ac.png&hash=a4366ec3711ea05ac9095947ea318dde0d7ab30f)
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fk489%2Frocketrossuk%2F3A_zps391759eb.png&hash=fd8caded9ed384986e3918d56ffc7ad69d386dc4)
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fdaz.co%2Fmedia%2Fk489%2Frocketrossuk%2F1B_zpsd452686a.png&hash=fe6c132578f5b9e34c7a6603e76b816de2bf37ce)
-
Go get a smoke test done. It should show you where the system is leaking boost.
-
Go get a smoke test done. It should show you where the system is leaking boost.
How much do they cost roughly?
-
Things such as temperature and air pressure can alter make a big difference on how the engine performs. Id really get it put on rollers to get it logged. If you are in leeds, rtech are only an hour and a bits drive away. If you had a boost leak you would get a fault code of P0299 of underboosting. I had this fault but it was the map rather than hardware.
-
Things such as temperature and air pressure can alter make a big difference on how the engine performs. Id really get it put on rollers to get it logged. If you are in leeds, rtech are only an hour and a bits drive away. If you had a boost leak you would get a fault code of P0299 of underboosting. I had this fault but it was the map rather than hardware.
Think R-tech is about 2 hours away. Stattlers is only 1 hour away so would be my first choice. Im more concerned about the the N75 redaing, it shouldnt be up at 100% for a long period of time.
Now i dont know if its the N75 that cause that or something else can cause it to do that :sad1:
-
Id take it back to the company who installed the map and get them to reinstall the std map. Do some logs and you will be able to tell if it is hardware or the software causing it. That is why I liked Shark and now back with Superchips Bluefin, as you can reinstall the std map and do these tests. Statlers has a very good reputation and will get to the cause of the problem for you. But it is annoying when cars develop these faults and I hope you get it sorted with out too much hassle :happy2: