All Things Mk5 > Performance Modifications

Bluefin Stage 2 too much boost .. not enough fuel pressure?

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Hedge:

--- Quote from: vwrascal on May 30, 2009, 09:42:37 pm ---^^ Wow, sounds like you know your stuff! quick Q? How do you log that data? I have vcds hex-can, do I need to go into 'applications' and then 'transport mode'??   :confused:  sorry for going off topic   :ashamed:

--- End quote ---

Please don't. All can be found on the Ross Tech website. http://www.ross-tech.com/vcds/tour/m-blocks.html
Select 01 Engine and 08 Meas Blocks or Adv Meas Blocks http://www.ross-tech.com/vcds/tour/adv-meas-blocks.html

Mark_GTIV:

--- Quote from: vwrascal on May 30, 2009, 09:42:37 pm ---^^ Wow, sounds like you know your stuff! quick Q? How do you log that data? I have vcds hex-can, do I need to go into 'applications' and then 'transport mode'??   :confused:  sorry for going off topic   :ashamed:

--- End quote ---

Dont know about knowing my stuff.. it's a learning curve.

Logging the data is quite easy - For this sort of stuff go to '01 Engine' then 'Measuring blocks' - choose the groups you're interested in. Then click log to file. it creates a .CSV file under the \logs directory of the place where you installed VCDS on your PC and you can just open it in excel and analyse it.

vwrascal:
just been out for a drive with vc graph running and I am impressed  :happy2: the graph is moving up and down like a donkeys hind leg, felt like a fast and furious moment with the laptop incar whilst driving  :chicken: havent a clue what anything means but at least I looked COOL   8) :grin:

vRStu:
I can't really read your graph very well, for me it's easier to look at the numbers.

You will get a drop in fuel pressure at the mid range, it's a known limitation of the stock fuel pump. 

I think your graph may be making it look worse than it is.

john_o:
crikey , everyones logging rail pressure these days lol
A drop in rail pressure to some degree can be normal. esp as you are seeing no more than 20 bar differential. I wouldnt bee convinced its that ,thats giving you an issue. Any fault codes / misfires etc?? or is it just 'flat' feeling?
What are youre timing / EGT / N75 etc ?

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