Reload this Page Need help reading the engine logs

[A4_cabrio]

Hey guys,

My car has been very sluggish lately. Up to the point that I felt I needed to take some logs - especially boost logs but the numbers I am getting confused me.
That's why I need your help.
So I logged channels - 020, 034 and and 115
I have a hard time interpreting the logs and I thought to start by sharing the boost logs maybe someone could tell me if the car is boosting right - I have APR93 and stock running and I would think right now the APR93 program is running.

This is a small snippet from a power run from 1080 rpms to 6200
I thought I was supposed to adjust for the atmospheric pressure but if I do that the idle boost is negative. If I dont - then the boost under load is huge - 26 psi

Can someone please help me? One of my suspicions was that somehow I am running stock and not APR or something in the turbo system broke down.


Engine | Engine | Boost Pressure Boost Pressure
Speed | Load | (specified) (actual)
% mbar mbar


1080 18 340 990
1040 18.8 330 990
1040 18.8 360 990
1000 30.8 540 990
1120 48.1 820 990
1440 66.9 1280 1000
1840 80.5 1740 1070
1960 85 1930 1190
2080 91.7 1950 1290
2160 99.2 1940 1380
2400 109 1910 1510
2680 127.1 1850 1720
2920 148.1 1780 1880
3080 143.6 1780 1820
3280 140.6 1780 1800
3480 139.1 1790 1790
3680 137.6 1810 1790
3920 139.1 1830 1800
4120 143.6 1850 1800
4320 143.6 1860 1820
4600 148.1 1870 1830
4800 147.4 1860 1820
5080 145.1 1840 1790
5320 143.6 1800 1780
5560 141.4 1760 1740
5760 137.6 1710 1710
5960 136.1 1660 1680
6200 133.1 1610 1640
6280 89.5 710 1960

[A4_cabrio]

Does anyone know what's the max psi on our stock program

I always thought it was 12 PSI which is what I am making now - but the tuner just told me it was 8 PSI and APR only brings it up to 15. I thought APR would bring it up to 18 PSI.

[eMacPaul]

Stock is 11-12, APR is bringing me up to 19.

[A4_cabrio]

ok. Thanks. It looks I was running stock - I switched to SLOT 2 - APR93 and I am showing 17-18 psi's now.
I wonder if it would get any better with more time

BTW: APR tech support was pretty nice - they pulled up my file and even told me which program was in slot 1 and which was in slot 2. Very nice and friendly service.

[A4_cabrio]

So I changed the program I am running - chose slot 2 - and I think my car is running better - it seems to be boosting more - 17-18 PSI's in some cases though this snapshot below doesnt have more than a little over 16.
Would a broken PCV prevent the turbo from boosting more?

Engine Engine Boost Pressure Boost Pressure
Speed Load (specified) (actual)
% mbar mbar psi

760 27.8 570 990 0
760 39.8 1000 980 -0.145
960 57.1 900 980 -0.145
1320 54.1 860 990 0
1520 60.2 930 1000 0.145
1600 63.2 940 1020 0.435
1680 63.2 900 1050 0.87
1680 58.6 790 1080 1.305
1600 48.9 670 1090 1.45
1480 42.9 600 1080 1.305
1320 41.4 570 1060 1.015
1240 38.3 550 1050 0.87
1200 38.3 550 1040 0.725
1160 37.6 580 1030 0.58
1160 37.6 590 1030 0.58
1200 39.8 620 1020 0.435
1240 43.6 680 1020 0.435
1280 45.1 800 1020 0.435
1400 54.1 880 1020 0.435
1560 60.2 1020 1020 0.435
1680 68.4 1020 1040 0.725
1760 66.2 780 1080 1.305
1720 54.9 760 1060 1.015
1600 48.9 780 1050 0.87
1520 48.1 760 1040 0.725
1440 47.4 880 1030 0.58
1480 58.6 950 1020 0.435
1480 63.2 950 1020 0.435
1520 65.4 950 1060 1.015
1520 64.7 1190 1080 1.305
1560 83.5 1570 1080 1.305
1640 85.7 1680 1120 1.885
1720 87.2 1750 1150 2.32
1760 87.2 1790 1190 2.9
1800 88.7 1950 1220 3.335
1880 89.5 2180 1250 3.77
1960 91 2320 1280 4.205
2040 94.7 2310 1320 4.785
2120 98.5 2310 1360 5.365
2200 101.5 2300 1400 5.945
2320 105.3 2310 1460 6.815
2400 108.3 2310 1520 7.685
2520 116.5 2310 1610 8.99
2640 134.6 2300 1760 11.165
2760 147.4 2290 1900 13.195
2880 160.2 2250 2010 14.79
3040 168.4 2210 2090 15.95
3200 166.9 2210 2120 16.385
3360 166.2 2200 2110 16.24
3520 165.4 2190 2110 16.24
3640 165.4 2190 2110 16.24
3800 163.9 2180 2090 15.95
3960 163.9 2180 2060 15.515
4080 163.2 2170 2050 15.37
4240 160.9 2160 2020 14.935
4360 160.9 2150 2000 14.645
4480 157.9 2140 1990 14.5
4600 156.4 2120 1970 14.21
4720 156.4 2110 1960 14.065
4840 156.4 2090 1940 13.775
4960 154.9 2070 1910 13.34
5080 152.6 2050 1880 12.905
5200 151.1 2030 1840 12.325
5320 147.4 1990 1800 11.745
5440 144.4 1970 1770 11.31
5560 144.4 1950 1750 11.02
5680 142.1 1910 1720 10.585
5760 140.6 1890 1710 10.44
5880 139.1 1860 1690 10.15
5960 136.1 1840 1660 9.715
6080 135.3 1820 1640 9.425
6160 133.8 1800 1640 9.425
6280 131.6 1770 1620 9.135
6360 131.6 1760 1600 8.845
6440 130.8 1740 1590 8.7
6440 129.3 1740 1590 8.7