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log gurus help needed apr stage 1 logs

Discussion in 'A4/S4 forum(B5 Chassis)' started by boost401, Sep 11, 2012.

  1. boost401
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    boost401 New Member

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    newbie here just want to say hi to everyone first .........before i start my complaining :arco:

    so i have a 2.7t tip and my car has been running like **** lately ....just feels low on power can anyone tell me if there something wrong with these logs if theres anything else i should plot let me know thanks

    0261207005(1)_template_20120831_182321-Compressor Map.jpg
    0261207005(1)_template_20120831_182321-Fueling.jpg
    0261207005(1)_template_20120831_182321-MassAirFlow.jpg

    0261207005(1)_template_20120831_182321-Timing.jpg
    0261207005(1)_template_20120831_182321-O2SVoltageSensor1, O2SVoltageSensor1Bank2_1.jpg
    0261207005(1)_template_20120831_182321-Power.jpg
    0261207005(1)_template_20120831_182321-Spool Rate.jpg
    Last edited: Sep 11, 2012
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  2. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    Seems to be lots of boost deviation in the midrange.

    Have you checked for boost leaks?
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  3. boost401
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    boost401 New Member

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    I did but the first time the tester popped off ( scared the **** out of me ) the second time the compressor kicked on (scared the **** out of me) .....I have a tiny pancake compressor and it's to loud to hear any leaks with that damn compressor on..... Should I just keep it running and not listen instead spray soapy water everywhere?
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  4. warren_S5
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    warren_S5 Moderator Staff Member Moderator

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    Graphs are very small on my laptop screen, but beyond 2,850rpm boost never seems to get anywhere near what the car is requesting (looks about 3psi under on average).

    I know some people with N75 valves on 1.8T's had issues with the valve itself, and leaks in the hoses around them where jubilee clips had been overtightened, so my first port of call would be to check there and the DV.
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  5. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    Fill the compressor tank, then shut the power off so the motor doesnt kick in.

    My compressor is only 10L and theres enough air in there to do a decent boost leak test 2 or 3 times before it needs refilled.
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  6. boost401
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    boost401 New Member

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    My compressor has .39 cfm and is 3.7 liters (1gallon) = the smallest cheapest compressor on the planet...... Will this work?
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  7. boost401
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    boost401 New Member

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    Thanks for this I will look into it :beerchug:
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  8. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    You'll probably get one go.

    Most compressors fill the tank to about 100psi, but the pump will kick in when it drops to 80 or 90.

    Theres still plenty air left in it at that point, its just trying to top itself back up.

    So let it charge up to maximum pressure, then turn off the power and use the stored air.
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  9. boost401
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    boost401 New Member

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    Thanks will do ....but I'm going to get a bigger one anyway
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