aca

Car:2002 Audi A4 1.8TQM, 30k miles, GIAC stage 1,
Evoms DV,NGK BKR6E spark plugs, everything else complete stock.
Vag-com:key-usb, latest software revision 07/14/06


Group A: '115
RPM Load Absolute Pres. Absolute Pres.
TIME
Marker STAMP /min % mbar mbar
0.01 2560 108.3 1850 1480
0.44 2720 131.6 1840 1780
0.93 2880 152.6 1850 1950
1.38 3080 152.6 1850 1940
1.82 3240 153.4 1850 1940
2.31 3440 151.9 1860 1940
2.76 3600 148.9 1860 1920
3.14 3720 145.9 1860 1910
3.58 3880 146.6 1850 1900
4.13 4040 143.6 1850 1880
4.68 4200 142.9 1840 1850
5.13 4360 142.1 1840 1830
5.61 4480 141.4 1840 1830
6.11 4640 142.1 1850 1810
6.55 4720 143.6 1850 1820
6.99 4840 143.6 1850 1840
7.42 4960 144.4 1850 1830
7.87 5040 143.6 1820 1810
8.25 5160 142.9 1810 1810
8.69 5240 140.6 1790 1780
9.07 5320 139.8 1780 1750
9.51 5400 138.3 1770 1740
9.91 5480 137.6 1760 1740
10.29 5600 136.8 1740 1740
10.73 5680 136.1 1730 1730
11.28 5760 134.6 1720 1700
11.77 5880 133.8 1720 1670
12.16 5960 132.3 1700 1690
12.65 6040 130.1 1680 1690
13.09 6120 128.6 1660 1660
13.48 6160 127.8 1660 1640
13.97 6280 124.1 1650 1640

Group A: '115
RPM Load Absolute Pres. Absolute Pres.
TIME
Marker STAMP /min % mbar mbar
0.33 2640 106.8 1680 1480
0.82 2800 130.1 1710 1760
1.26 2920 140.6 1740 1840
1.7 3080 142.9 1760 1830
2.19 3240 144.4 1780 1830
2.64 3400 143.6 1810 1840
3.08 3520 143.6 1820 1850
3.51 3680 142.9 1820 1830
3.9 3800 141.4 1820 1840
4.45 3960 139.8 1820 1840
4.84 4040 139.1 1820 1840
5.33 4160 139.8 1820 1830
5.82 4320 139.1 1830 1810
6.32 4440 138.3 1830 1830
6.71 4560 139.1 1830 1800
7.2 4680 138.3 1840 1820
7.69 4840 141.4 1830 1810
8.19 4960 142.1 1830 1810
8.63 5080 140.6 1820 1810
9.07 5200 139.1 1800 1800
9.51 5320 139.8 1790 1750
9.9 5440 138.3 1780 1750
10.39 5560 137.6 1760 1750
10.83 5680 136.8 1750 1720
11.38 5800 134.6 1750 1710
11.82 5920 130.8 1740 1740
12.31 6000 131.6 1730 1710
12.8 6120 130.1 1710 1700
13.25 6240 127.8 1700 1700
Did two runs, measured blocks 115 and 020, 3rd gear, WOT, oat 91F, relative humidity 70%, elevation 1000ft.
Do these numbers indicate normal values, requested vs actual boost, do I have a boost leak or not?
Block 020 gives me more worries, I will try to paste it here.
CF CF CF CF
2560 0 0 0.8 1.5
2720 0 0 0 1.5
2880 0 0 0 3.8
3080 0 0 0 3.8
3240 0 0 0 3.8
3440 3 0 0 3.8
3600 3 0 3 3.8
3720 3 0 3 5.3
3880 3 0 3 5.3
4040 3 0 3 5.3
4200 3 0 3 5.3
4360 3 0 3 5.3
4480 6 3 6 5.3
4640 6 6 6 7.5
4720 6 6 6 7.5
4840 6 6 6 7.5
4960 6 9 6 9
5040 6 9 9 9
5160 6 9 9 9
5240 6 9 9 9
5320 6 9 9 9
5400 6 9 9 9
5480 6 9 9 9
5600 6 9 9 9
5680 6 9 9 9
5760 6 8.3 8.3 8.3
5880 6 8.3 8.3 8.3
5960 6 8.3 8.3 8.3
6040 6 8.3 8.3 8.3
6120 6 8.3 8.3 8.3
6160 5.3 8.3 8.3 8.3
6280 5.3 8.3 8.3 8.3

I know numbers over 6 are not good. No audiable pinging or anything abnormal that I could hear. I run 91 Octane.
Second run looks better, but why such a difference between two.

/min CF CF CF CF
2640 0 0 0 0
2800 0 0 0 0
2920 0 0 0 3
3080 0 0 0 3
3240 0 0 0 3
3400 0 0 0 3
3520 0 0 0 3
3680 0 0 0 3
3800 0 0 0 3
3960 0 0 0 3
4040 0 0 0 3
4160 0 0 3 3
4320 0 0 3 3
4440 0 0 3 3
4560 3 3 3 5.3
4680 3 3 3 5.3
4840 3 3 3 5.3
4960 3 3 3 5.3
5080 3 3 3 5.3
5200 3 3 3 5.3
5320 6 3 2.3 5.3
5440 6 3 2.3 5.3
5560 6 3 2.3 4.5
5680 6 3 2.3 4.5
5800 6 2.3 2.3 4.5
5920 6 2.3 2.3 4.5
6000 6 2.3 2.3 4.5
6120 6 2.3 2.3 4.5
6240 6 5.3 5.3 4.5

My apology for the length of this and format as this is my very first time posting logs here. Any input or oppinion is appreciated.
Thanks

diagnosticator1

but the requested/actual boost comparison looks OK, disregarding the low boost levels. I don't see any evidence of a boost leak from that data. The high CF values can be the result of the timing values mapped by GIAC, and the 90+ F temps you logged at, plus intercooler heat soak and the 91 octane gas. Values below 12 CF, control knock, but the higher it gets, the less headroom there is if needed for worst case situations.

aca

I could not find the formula to convert mbar to psi in order to get an idea. Tuner mentioned that the requested boost should be about 1.1 bar which I don't see in my logs. I belive I saw a peak of little over .9 bar requested.
I did not see much difference bteween requested vs actual which I belive eliminated boost leak.
My biggest concern was 9 on timing pull back during the first run, however I did not log exhaust gas temps to correlate the two. Second run seemed much better on timing pull back as it peaked on no 4 cylinder at 5.3. Just curious why such a difference between two runs as they were few minutes apart in identical conditions.
As I indicated the car is GIAC stage 1 with evoms dv nothing else. And I did it for reasons of not wanting to put any more stress on the engine. That is why I stayed a little conservative in my modding plans.
Should I be worried over these numbers or not.
As always thanks for your input.

diagnosticator1

One thing to remember, considering the outside air temps of 90+F, the charge air temp after the intercooler may be high enough that the ECU is lowering boost below the mapped values, to prevent knock caused by high charge air temps.

If you have the chance to log 115, and 20 again, under similar conditions, log the IAT sensor output also. Boost requested should go down as IAT exceeds a certain value.
I believe that will reveal the reason for the lower than expected requested boost, and, I also would expect higher CF on ignition with high IATs.

Edit: The peak boost logged, was 1,950 millibars absolute pressure. 1950 millibar abs = 28.28 psi abs, 28.28 psia - 14.5 psia = 13.78 psig = boost pressure "gauge". = ~14 psig boost.

There is no "problem" with the CF values logged, below 12 CF, there is no knock occuring.

Please follow up with a post back if you get further data with IATs also.<ul><li><a href="http://www.onlineconversion.com/pressure.htm">Units Conversion, millibar to psi absolute:</a></li></ul>

aca

I have to catch my brother again to sit behind with the laptop. I have just a key-usb interface and not sure if it will provide enough speed to log three blocks at once in a meaningfull way. Just got it yesterday and still learning how to use it. Thanks again.

All Wheel Driver

1.95 bar - 1 bar (atmosphere)= .95 bar. (boost gauge reading)
.95 bar = roughly 14psi.

diagnosticator1

I know there is better writing ability out there, and as the readers of these forums have varying knowledge and background for the technical info, I usually over-explain concepts and descriptions with the less experienced forum readers in mind. As I've mentioned before, I don't always have a good feel for how much detailed info to provide, to help with subject clarity, balanced with keeping the posts short for easy reading.

aca

Does it sound like clicking noise? I noticed with windows down only, during acceleration 2nd and 3rd gears, around 3000rpm, just a brief couple of clicks(under load), and goes away. Just don't know how to recognize pinging. thanks

diagnosticator1

You can also use Lemmiwinks to retard the ignition timing .75 or 1.5 degrees to determine if that effects the sound you hear.

aca

No luck. In Kansas City, Amoco used to have it, but since it turned BP no more. I will check with Audi club to see if they know.
That will be the next thing I will try. I suspect that the problem will go away as soon as this hot weather goes away.
Thanks