1st run of a data log....

[Kgnast]

2360 rpm to 6000rpm. Eased into throttle to not trip the kickdown sensor. 3rd Gear pull. I'm not sure what all the lambda stuff is..... but I see a flattening of boost at mid to high range rpms, accompanied with a drop in BTDC timing.... Let me know your thoughts guys.... mbar hit two peaks, 1620 at 3760 rpm, and then again at 1650 at 6000 rpm just over 90. Jumped to 1690 upon letting off the throttle, just for. After hitting 1620 it bounced around at 1550-1590. Car is STOCK. 0 performance mods at this point in time.....

Would love some schooling.....


<tbody>
Saturday
5
January
2013
14:57:27














4D1 907 558 D
4.2l V8/5VT G 0003


































Group A:
'003



Group B:
'031



Group C:
'115








Engine Speed
Mass Air Flow
Throttle Valve Angle
Ignition

Lambda Control
Lambda Control
Lambda Control
Lambda Control
Engine Speed
Engine Load
Boost Pressure
Boost Pressure



TIME
(G28)
(G70 + G246)
Timing Angle
TIME
Bank 1 (actual)
Bank 1 (specified)
Bank 2 (actual)
Bank 2 (specified)
TIME
(G28)

(specified)
(actual)



Marker
STAMP
/min
g/s
%
°BTDC
STAMP
V
V
V
V
STAMP
/min
%
mbar
mbar




0.32
2360
20.47
6.3
42
0.5
0.09
0.66
0.725
0.645
0.16
2360
19.5
1010
1030




0.84
2400
20.28
6.3
42
1.01
0.665
0.635
0.085
0.66
0.67
2400
19.5
1010
1030




1.37
2440
21.14
6.7
42
1.54
0.72
0.635
0.095
0.67
1.19
2440
19.5
1010
1030




1.89
2480
35.92
11
38.3
2.06
0.14
0.29
0.685
0.485
1.71
2440
22.6
1010
1030




2.4
2560
93.97
27.8
33
2.57
0.745
0.71
0.74
0.685
2.23
2520
48.9
1090
1020




2.92
2760
151.72
99.2
23.3
3.09
0.11
0.15
0.615
0.675
2.75
2680
93.2
1610
1220




3.43
3000
182.06
100
15
3.61
0.805
0.805
0.825
0.815
3.26
2920
127.1
1610
1610




3.98
3280
194.08
100
16.5
4.15
0.815
0.81
0.845
0.825
3.8
3160
133.1
1600
1620




4.51
3520
215.69
100
15
4.68
0.825
0.82
0.845
0.835
4.33
3440
136.1
1580
1610




5.04
3760
237.53
100
17.3
5.21
0.825
0.825
0.84
0.83
4.86
3720
139.8
1570
1620




5.57
4040
243.42
99.6
18
5.75
0.83
0.825
0.84
0.835
5.39
3960
136.1
1550
1580




6.1
4280
256.03
100
15
6.27
0.82
0.815
0.835
0.82
5.92
4200
132.3
1570
1550




6.61
4480
279.42
100
15
6.79
0.81
0.81
0.83
0.825
6.44
4440
135.3
1590
1550




7.16
4720
296.14
100
14.3
7.33
0.81
0.81
0.84
0.83
6.98
4680
140.6
1610
1590




7.69
4960
307.81
100
12.8
7.86
0.83
0.83
0.835
0.84
7.51
4880
139.1
1580
1580




8.21
5160
326.08
100
15.8
8.4
0.82
0.825
0.84
0.84
8.03
5120
139.1
1580
1550




8.73
5400
344.92
100
15.8
8.91
0.82
0.82
0.835
0.84
8.57
5320
139.1
1600
1550




9.27
5600
362.47
100
17.3
9.44
0.805
0.81
0.83
0.83
9.1
5520
142.1
1630
1590




9.8
5800
364.08
100
18
9.99
0.81
0.81
0.83
0.835
9.64
5720
143.6
1630
1610




10.33
6000
364.08
100
21.8
10.5
0.805
0.815
0.835
0.84
10.16
5920
142.1
1620
1640




10.87
6200
364.08
99.6
21.8
11.04
0.82
0.83
0.835
0.845
10.69
6120
140.6
1630
1650




11.39
6240
18.83
5.5
22.5
11.57
0.055
0.73
0.82
0.845
11.22
6200
69.9
1010
1690




11.93
6120
35.17
9.8
6.8
12.1
0.075
0.695
0.525
0.785
11.75
6160
12.8
1010
1190




12.46
6000
34.64
9.8
6.8
12.64
0.005
0.005
0.005
0.01
12.28
6080
12.8
1010
1140




12.98
5320
32.17
9.4
3.8
13.15
0.005
0.01
0.005
0.005
12.82
5680
13.5
1010
1100




13.52
4200
22.94
6.7
3
13.71
0.005
0.005
0.005
0.005
13.33
4600
12.8
1010
1090




14.08
3560
14.92
4.3
4.5
14.25
0.005
0.005
0
0.005
13.89
3600
9.8
1010
1070




14.61
3520
14.89
4.3
5.3
14.8
0
0.005
0
0.005
14.43
3560
9
1010
1060




15.15
3480
14.75
4.3
4.5
15.33
0
0.005
0
0
14.98
3480
9
1010
1050








































</tbody>

[Kgnast]

Interesting thing these lambda values..... at 100 WOT, I can see that the car's lambda's are over .80+, considering .85 is max efficiency and performance, that seems okay to me, bank to bank, as the numbers show .82's, .83's, .84's at both banks. I think the other wacky numbers, from 2300 rpm to 2760 rpm is a byproduct of the car's monitoring and changing the A/F ratio as I eased into WOT. Weird is that right before WOT, the numbers returned from bank 1 is .11 actual, .15 specified..... Why the total push to super duper rich for that .5 second? Just a weird glitchy thing? I'd ofcourse rather see it go RICH for an instant than in the other direction and lean out at like 1.3 or something.... the other thing that seems to be the case, is that shouldn't the car be running much leaner at less throttle and not richer at less throttle?

I could be reading these things wrong, but my limited knowledge of Lamda values and stoichiometric balance is that at 1.0 (14.7:1 A/F) its balanced, at < 1.0 its rich, at > 1.0 its lean.

Thoughts? Input? Thanks in advance...

[Kgnast]

I don't like that fact that my timing at WOT is all over the place..... what's up with that? Normal?

[DHall1]

please log in turbo mode

Hit the turbo button before starting the log

so far it looks good. I bet the car feels good.

timing looks good...lets see turbo mode

[Kgnast]

please log in turbo mode

Hit the turbo button before starting the log

so far it looks good. I bet the car feels good.

timing looks good...lets see turbo mode



It's VCDS Lite, I hit the button, it said feature not accessible..... to clarify, its VCDS Lite v1.1, and I am using the standard issue BLUE cable. I believe the Turbo feature, for faster/more samplings per time increment (right?) only works with the HEX cable, and perhaps not with the ft232r USB uart cables...... which is what I have.


Eh, I'll go back out with the ME7Logger running and see what kind of date I can pull down for posting. I am interested in running the ME7 data through the ECUxPlot graphic application. I guess I can also do this with the VC-Scope and the VAG data.

[V8weight]

These aren't lambda numbers, they're lambda voltages... 0.82 is about 11:1, the smaller the number, the leaner the air to fuel ratio.. In open loop you ideally want to be between .82 and .88.... In closed loop (partial throttle) the voltages are swinging between .1 and .8 about 10 times a second... Kind of hard to log especially at your sample rate. The only real way to log closed loop a/f ratio is to log, graph on excel and do a trend line..

[V8weight]

Most stock rs6's that I've logged tend to run a bit on the lean side, usually around .76- .78... They're tuned for fuel efficiency from the factory and use egt temps to dump extra fuel to protect the turbos when things get hot.

[ttboost]

...and yank timing like you read about...

[Kgnast]

...and yank timing like you read about...

and nobody likes to have their timing yanked..... other things maybe, but not CERTAINLY NOT timing...... LOLOLOL.

[ttboost]

it's all about the tune...

[Brav]

Looks pretty normal and healthy, but ya turbo mode will be necessary to verify that. Normal for timing numbers to fluctuate through RPM climb.

[lswing]

Looks nice and happy. The swing in boost seems minor to me, it might just be reaching peak requested, then backing off at touch, then back to peak. Maybe some tiny leak on an ic peventing holding boost, just guessing?