Chipped only 14.5 lbs of boost?

[RKturbo]

Well drove the little beast around now that I have it all back together. Seems to pull really hard at first but tapers off pretty quickly. It has been pretty warm down here low 90's but am still surprised as that seems low to me. No fault codes and everything LOOKS OK. Ran Vagcom and got my first log and posted results below. If my math is correct it seems to be maxing out on boost at around 14lbs. I am running one of Marc's (10sec) tunes so figured would be a good bit higher. I guess it would not be to bad of leak as the requested not a whole lot higher than actual. Anyways, wanted some guys that have some experience to look it over and give me some input on what they see.


<colgroup><col width="64" span="16" style="width:48pt"> </colgroup><tbody>

Group A:
'003



Group B:
'002



Group C:
'115







Engine Speed
Mass Air Flow
Throttle Valve Angle
Ignition

Engine Speed
Engine Load
Mass Air Flow
Mass Air Flow
Engine Speed
Engine Load
Boost Pressure
Boost Pressure



TIME
(G28)
(G70 + G246)
Timing Angle
TIME
(G28)

(G70) Bank 1
(G246) Bank 2
TIME
(G28)

(specified)
(actual)


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



0.46
2520
35.81
10.2
38.3
0.11
2480
31.6
16.39
19.11
0.28
2480
31.6
1010
1040



0.96
2520
36.39
10.2
38.3
0.62
2520
30.8
16.03
19
0.79
2520
30.8
1010
1040



1.48
2560
100.75
81.2
31.5
1.15
2520
30.8
16.64
18.94
1.32
2560
45.9
2140
1000



1.98
3520
174.72
100
27
1.65
2640
82.7
55.36
58
1.82
2840
91.7
2100
1210



2.48
4680
364.08
100
10.5
2.15
4240
119.5
144.39
131.81
2.32
4560
150.4
2100
1880



2.98
5200
364.08
100
0.8
2.65
4880
179.7
196.86
198.67
2.82
5080
181.2
2030
2070



3.5
5640
364.08
100
10.5
3.15
5360
172.2
201.75
205.92
3.33
5520
168.4
2020
1940



3.98
6040
364.08
100
11.3
3.66
5760
160.2
204.61
210.28
3.82
5920
156.4
2080
1870



4.49
6440
364.08
99.6
21
4.15
6160
151.9
213.53
208
4.33
6280
148.1
2110
1810



4.99
6160
364.08
100
1.5
4.65
6520
142.9
208.19
212.06
4.83
6520
143.6
2100
1790



5.49
4880
364.08
97.6
3
5.15
5680
160.9
207.33
208.58
5.33
5000
175.2
2020
1950



6.02
5120
364.08
100
2.3
5.67
5000
182.7
202.28
206.39
5.84
5040
178.9
2020
2120



6.55
5320
364.08
100
9.8
6.19
5160
173.7
197.58
205.08
6.37
5280
170.7
2020
2010



7.04
5520
364.08
100
10.5
6.71
5360
169.9
206.17
202.83
6.87
5440
168.4
2020
1990



7.54
5680
364.08
100
6
7.2
5560
167.7
212.39
208.58
7.37
5640
165.4
2060
1960



8.06
5880
364.08
100
14.3
7.72
5760
161.7
209.42
211.97
7.89
5800
160.9
2090
1930



8.59
6040
364.08
99.6
12
8.23
5920
157.1
209.31
210
8.4
6000
156.4
2090
1880



9.09
6200
364.08
99.6
18
8.76
6080
154.1
207.69
211.81
8.93
6160
152.6
2090
1870



9.64
6360
364.08
99.6
13.5
9.27
6240
150.4
208.92
206.75
9.46
6320
149.6
2080
1850



10.14
6520
364.08
100
15
9.8
6440
146.6
210.58
208.42
9.96
6480
144.4
2080
1860



10.69
4760
364.08
98
-6.8
10.3
6280
145.9
209.14
203.39
10.52
5520
166.2
2060
1930



11.2
4600
336.81
100
3
10.85
4600
170.7
155.72
179.42
11.03
4560
161.7
2160
2010



11.71
4760
364.08
100
6.8
11.37
4640
166.9
176.19
182.89
11.54
4680
173.7
2110
2150



12.21
4760
364.08
97.3
-0.8
11.89
4800
181.2
193.47
194.72
12.05
4800
179.7
2070
2200



12.71
4640
30.14
7.1
15.8
12.37
4680
63.2
20.56
13.75
12.54
4640
15.8
1010
1650



13.25
4560
28.44
8.6
1.5
12.89
4600
14.3
8.86
14.28
13.07
4560
14.3
1010
1150



13.76
4440
25.08
7.1
2.3
13.42
4520
13.5
12.11
15
13.59
4480
13.5
1010
1090



14.27
4320
25.08
7.1
2.3
13.94
4400
12.8
12.75
13.33
14.1
4360
12.8
1010
1070



14.78
4200
23.44
6.7
3
14.44
4280
12.8
11.61
13.06
14.6
4240
12
1010
1060



15.29
4040
22.33
6.3
3
14.95
4160
12
11.25
12.58
15.12
4080
12
1010
1060



15.81
3920
20.28
5.9
3
15.46
4000
12
10.47
11.92
15.63
3960
12
1010
1050



16.3
3800
19.94
5.5
3
15.97
3880
11.3
9.67
10.11
16.13
3840
11.3
1010
1050



16.82
3680
18.92
5.5
3
16.48
3760
11.3
8.78
10.22
16.65
3720
11.3
1010
1040



17.33
3560
18.31
5.1
3
16.99
3640
10.5
8.53
9.61
17.16
3600
11.3
1010
1040



17.84
3480
17.92
5.1
2.3
17.49
3560
11.3
8.97
9.78
17.66
3520
11.3
1000
1040



18.37
3400
17.36
4.7
2.3
18.02
3440
10.5
8.14
9.42
18.19
3440
10.5
1000
1030



18.88
3320
16.56
4.7
3
18.55
3400
11.3
7.61
9.25
18.72
3360
11.3
1000
1030



19.4
3280
16.47
4.7
3
19.05
3320
10.5
7.44
9.19
19.23
3280
10.5
1000
1030



19.92
3200
16.28
4.7
3
19.57
3280
10.5
7.08
8.97
19.74
3240
10.5
1000
1030



20.43
3160
15.78
4.3
3
20.09
3200
10.5
7.14
8.53
20.26
3160
10.5
1000
1030



20.93
3120
15.28
4.3
3
20.6
3120
10.5
7.36
8.53
20.77
3120
11.3
1000
1030



21.43
3080
15.67
4.3
3
21.1
3080
10.5
6.83
8.44
21.27
3080
10.5
1000
1030



21.94
3040
14.89
4.3
3
21.6
3040
11.3
7
8.83
21.77
3040
10.5
1000
1030



22.43
3000
15.19
4.3
3
22.1
3040
10.5
6.72
8.64
22.27
3000
10.5
1000
1030



22.94
2960
14.89
3.9
1.5
22.6
2960
10.5
6.89
8.22
22.77
2960
11.3
1000
1030



23.46
2920
14.39
3.9
2.3
23.1
2960
11.3
6.56
8.11
23.27
2920
10.5
1000
1030



23.96
2880
14.06
3.9
2.3
23.63
2920
10.5
6.64
7.92
23.8
2880
11.3
1000
1030



24.46
2840
13.97
3.9
2.3
24.13
2880
10.5
6.22
8.11
24.3
2840
10.5
1000
1030



24.99
2800
14.36
3.9
2.3
24.65
2840
10.5
6.33
7.92
24.82
2840
10.5
1000
1030



25.49
2760
14.36
3.9
1.5
25.16
2800
10.5
6.17
8.17
25.32
2760
10.5
1000
1030



25.99
2720
14.86
3.9
1.5
25.66
2760
11.3
6.44
8.33
25.82
2760
11.3
1010
1030

</tbody>

[4everRS]

Looks like that's what is specified obviously. I think Marc does more with timing and fuel than with boost.

Would you be willing to post another log with block 31 in turbo mode? Also the block for injector duty cycle(I can't remember the number)

[ttboost]

Sounds about right. Probably peaks at 15psi, and tapers to about 9 or 10psi at redline.....maybe less. Waste gates are only about 3-4psi cans, so they are working overtime at 1 bar anyway...Looks like its yanking 6deg of timing at peak TQ, probably due to heat...

[DHall1]

3, 31, 115
In turbo mode

Rolling in 3rd gear 2500 to redline

Not after its heat soaked. Say 15 minutes of warm up

[Bigglezworth]

The boost is accurate. Marc's tune has timing and fuel management vs. running too high of boost. The K04's can't handle anything more than 17-18psi anyway. 90deg+ will affect your output without a doubt. I run better during spring/fall than during summer without a doubt....

[mbagge01]

I just got Marc's tune and I max out around 18 psi and it drives smooth and my fuel trims are solid. Could I have a different tune that some of you?

[RKturbo]

I figured it would be closer to 17-18lbs. It is fast for sure but just was expecting a little more. Course gutted precats is really only real mod but is a couple hundred pounds lighter as well. How much of a drop is there normally between requested and actual? Will make a couple of passes tomorrow evening after dark when its a little cooler. I tried to hit turbo mode but it just beeped at me. I wonder if this option available on all vs of Vagcom?

[DHall1]

There is the right time to select turbo

Also it needs to be enabled and not ghost button

[lswing]

Yep, select blocks as said, egt, boost, timing. Then click turbo mode. Then click log. Start log just before your run. I've noticed increased outside temps above 80F seems to cause reduced requested boost by 1-2 pounds. ECU sees high AIT and knows it's bad for high boost, you'll get your timing yanked like the log shows.

You need water meth when driving in that type of heat.

This car is an absolute rocket when 45F and crispy out.

[RKturbo]

Well did a another run 3rd and 4th gear. Logged coolant and air temps. In the evening so a LITTLE cooler outside. Had to drive a ways to get to a spot where I could make a run. Seems to be a slightly more boost this evening. So thoughts?


<colgroup><col span="17"></colgroup><tbody>


Engine Speed
Battery Voltage
Coolant
Intake Air

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



TIME
(G28)
(Terminal 30)
Temperature (G62)
Temperature (G42)
TIME
Bank 1 (actual)
Bank 1 (specified)
Bank 2 (actual)
Bank 2 (specified)
TIME
(G28)

(specified)
(actual)



Marker
STAMP
/min
V
°C
°C
STAMP
V
V
V
V
STAMP
/min
%
mbar
mbar




0.09
2400
13.37
90
52
0.03
0.79
0.795
0.805
0.785
0.06
2400
85
2230
1190




0.22
2440
13.51
90
51
0.13
0.645
0.745
0.66
0.71
0.18
2440
89.5
2230
1240




0.34
2600
13.3
90
51
0.26
0.66
0.625
0.1
0.4
0.31
2560
94
2230
1290




0.46
3200
13.44
90
51
0.38
0.495
0.475
0.085
0.105
0.43
3000
99.2
2210
1360




0.59
3800
13.37
90
51
0.5
0.835
0.845
0.825
0.84
0.54
3520
107.5
2180
1410




0.68
4040
13.3
90
51
0.62
0.835
0.84
0.825
0.83
0.65
4000
118.8
2160
1540




0.78
4280
13.23
90
51
0.71
0.825
0.83
0.82
0.825
0.74
4200
134.6
2150
1720




0.9
4320
13.37
90
51
0.81
0.815
0.82
0.795
0.805
0.85
4280
150.4
2150
1930




1
4440
13.23
90
51
0.94
0.805
0.8
0.795
0.8
0.97
4400
169.9
2150
2130




1.12
4600
13.3
90
51
1.04
0.815
0.825
0.81
0.82
1.09
4560
180.5
2150
2190




1.24
4680
13.3
90
51
1.15
0.83
0.835
0.835
0.835
1.2
4680
182.7
2140
2210




1.34
4800
13.3
90
51
1.27
0.835
0.84
0.84
0.84
1.31
4760
182.7
2150
2190




1.49
4960
13.23
90
50
1.38
0.845
0.855
0.855
0.85
1.45
4920
180.5
2150
2150




1.6
5000
13.37
90
50
1.53
0.84
0.85
0.845
0.845
1.56
4960
185
2070
2110




1.73
5120
13.3
90
50
1.63
0.855
0.86
0.85
0.86
1.68
5040
188.7
2060
2090




1.85
5200
13.23
90
50
1.77
0.86
0.865
0.86
0.87
1.81
5160
186.5
2060
2060




1.96
5320
13.3
90
50
1.9
0.86
0.87
0.865
0.87
1.93
5280
182.7
2060
2030




2.09
5400
13.3
90
50
2
0.865
0.88
0.865
0.865
2.04
5400
179.7
2060
2000




2.23
5480
13.3
90
50
2.14
0.86
0.875
0.86
0.87
2.18
5480
175.9
2060
1970




2.37
5640
13.3
90
50
2.28
0.86
0.865
0.865
0.865
2.32
5640
172.2
2080
1950




2.51
5720
13.3
90
50
2.42
0.86
0.87
0.865
0.865
2.46
5680
171.4
2090
1940




2.65
5840
13.23
90
50
2.56
0.86
0.87
0.87
0.87
2.6
5800
167.7
2090
1900




2.76
5960
13.16
90
50
2.68
0.865
0.875
0.87
0.875
2.72
5920
163.9
2090
1880




2.88
6040
13.3
90
50
2.81
0.86
0.875
0.875
0.88
2.84
6000
161.7
2090
1850




3.02
6120
13.23
90
51
2.93
0.86
0.875
0.875
0.885
2.98
6120
159.4
2090
1830




3.15
6200
13.23
90
51
3.07
0.86
0.87
0.875
0.885
3.1
6200
157.1
2090
1830




3.28
6280
13.3
90
51
3.2
0.865
0.875
0.88
0.89
3.24
6280
155.6
2090
1810




3.43
6400
13.3
90
51
3.32
0.86
0.875
0.89
0.895
3.38
6360
154.1
2090
1800




3.57
6480
13.16
90
51
3.48
0.865
0.875
0.885
0.895
3.52
6440
152.6
2090
1810




3.71
6480
13.3
90
52
3.62
0.86
0.88
0.885
0.89
3.67
6440
152.6
2090
1800




3.84
6120
13.16
90
52
3.74
0.865
0.88
0.885
0.895
3.79
6280
154.9
2090
1800





















</tbody>

[lswing]

Seems just fine. Lambda values look good, so not running lean. I thought Block 112 was EGT, would like to see that.

Add a robust water meth kit next, it will help greatly in the heat.

[DHall1]

Lots of fuel and lots of boost

I like it

Its hot out.....your car is running good

I like the numbers.

Post up 3, 31, 115 if you can

[4everRS]

Peaking briefly at 17.5 psi. Staying above 16 psi for a nice amount of time. Lambda numbers look good. I'd still like to see your injector duty cycle to see how much they're being stressed.

Good log

[Bigglezworth]

It's a solid tune and performs well. It can go through fuel like a fat kid on a Smartie though which as you can tell is associated with fuel trims and boost.... There are no surprises in the stats you've posted, but of course I already knew what I would see. ;) When Florida drops to a 'chilly' 60F, you will pick up more power. Imagine these specs when temps are around 30-40F..... :)

[RKturbo]

Mmmm yeah I'm sure would be a difference if it was 50 degrees cooler. Maybe I should move to N Dakota? ;) Going to get sec cats removed tomorrow and will make a couple more runs tomorrow evening. Will get 3,31 and 15 this time. Definitely looks like its losing a little more punch than what it is calling for on near red line. Wonder if I am bleeding a little bit from a leak or just stock turbos cannot keep up. Drag strip right down the road from me so will be taking to make a couple of runs but gonna wait till a good bit nicer weather. Think I am going to replace diverter valves anyway. One of the few things on these cars that are an easy swap and not much $. Lol

[4everRS]

Stock turbos just can't flow at that rpm. Looking forward to your results with main cats gone. A good measure for that would be to log block 2 again showing mafs.

But also do 3,31,115

[DHall1]

Backpressure.

[RKturbo]

Well got the sec cats removed today. Actually sounds pretty good. Was worried about it being too loud but not at all. Little warmer out tonight and car was good toasty by the time I got to test spot. 1st log is 03-31-115 and second as requested was 02-31-115. So everything look peachy?


<colgroup><col width="64" span="17" style="width:48pt"> </colgroup><tbody>

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
2320
82.53
20.8
27.8
0.03
0.74
0.745
0.675
0.725
0.06
2400
76.7
1070
1270




0.09
2400
82.14
20
29.3
0.12
0.72
0.775
0.66
0.705
0.15
2400
76.7
1050
1270




0.18
2400
80.53
19.6
28.5
0.22
0.745
0.77
0.675
0.72
0.25
2440
75.9
1040
1270




0.28
2440
81.06
19.6
28.5
0.31
0.72
0.79
0.71
0.725
0.34
2440
75.2
1010
1270




0.37
2440
81.83
19.2
30
0.4
0.74
0.785
0.715
0.71
0.43
2480
72.2
1010
1270




0.47
2480
72.97
18
30
0.5
0.74
0.785
0.72
0.72
0.54
2520
69.2
1450
1260




0.57
2520
71.25
18.4
31.5
0.61
0.75
0.765
0.69
0.71
0.64
2560
87.2
2210
1220




0.67
2560
118.56
60
26.3
0.71
0.845
0.86
0.84
0.85
0.75
2560
92.5
2200
1260




0.79
2560
120.61
87.1
24.8
0.83
0.725
0.72
0.64
0.64
0.86
2600
96.2
2200
1310




0.89
2600
130.58
95.7
16.5
0.92
0.41
0.48
0.1
0.085
0.95
2600
101.5
2190
1360




0.98
2640
136.33
98.4
22.5
1.01
0.56
0.635
0.13
0.095
1.04
2720
106
2190
1410




1.08
2840
156.17
100
17.3
1.11
0.57
0.425
0.08
0.11
1.14
3080
112.8
2170
1450




1.17
3240
181.19
100
18
1.2
0.72
0.775
0.18
0.23
1.23
3520
117.3
2140
1540




1.26
3680
225.42
100
17.3
1.29
0.855
0.875
0.835
0.86
1.32
4000
129.3
2130
1620




1.36
4200
278.22
100
15.8
1.39
0.835
0.855
0.835
0.845
1.42
4360
140.6
2120
1770




1.45
4440
338.64
99.6
12.8
1.48
0.825
0.835
0.815
0.835
1.52
4560
154.1
2110
1930




1.55
4560
364.08
99.6
6.8
1.58
0.8
0.82
0.795
0.8
1.61
4560
168.4
2110
2040




1.64
4640
364.08
100
8.3
1.68
0.84
0.86
0.835
0.85
1.72
4760
173.7
2120
2090




1.76
4800
364.08
99.6
12
1.79
0.845
0.86
0.845
0.86
1.83
4880
175.9
2130
2100




1.86
4880
364.08
100
12
1.89
0.85
0.86
0.855
0.865
1.94
4960
177.4
2090
2070




1.98
5000
364.08
100
9.8
2.02
0.86
0.87
0.855
0.87
2.05
5080
183.5
2030
2060




2.09
5120
364.08
100
10.5
2.13
0.865
0.89
0.865
0.885
2.17
5200
182.7
2030
2020




2.22
5200
364.08
100
6.8
2.25
0.87
0.89
0.865
0.89
2.3
5320
182
2030
2020




2.34
5360
364.08
100
12
2.38
0.875
0.895
0.875
0.895
2.43
5440
176.7
2030
1960




2.47
5440
364.08
100
8.3
2.52
0.87
0.89
0.865
0.89
2.57
5520
173.7
2040
1940




2.6
5560
364.08
100
9.8
2.64
0.865
0.89
0.87
0.885
2.69
5640
169.9
2060
1920




2.73
5640
364.08
100
10.5
2.78
0.875
0.895
0.875
0.895
2.83
5760
166.9
2090
1900




2.88
5760
364.08
100
12
2.93
0.865
0.89
0.87
0.89
2.97
5880
165.4
2100
1870




3.01
5920
364.08
100
13.5
3.05
0.87
0.885
0.87
0.89
3.07
5920
163.2
2100
1850




3.11
5960
364.08
100
18
3.14
0.865
0.895
0.88
0.9
3.17
6040
162.4
2100
1860




3.21
6080
364.08
100
18
3.25
0.87
0.89
0.885
0.905
3.28
6120
159.4
2100
1830




3.33
6160
364.08
100
15
3.37
0.87
0.895
0.895
0.915
3.41
6200
157.9
2100
1810




3.46
6240
364.08
99.6
20.3
3.5
0.875
0.895
0.885
0.915
3.55
6320
154.9
2100
1810




3.58
6320
364.08
99.6
19.5
3.63
0.875
0.905
0.895
0.915
3.67
6400
153.4
2100
1790




3.71
6400
364.08
99.6
21
3.75
0.88
0.9
0.895
0.91
3.78
6440
151.9
2100
1790




3.85
6480
364.08
100
21.8
3.9
0.875
0.9
0.895
0.91
3.93
6480
151.9
2100
1810




3.97
6480
364.08
100
16.5
4.02
0.88
0.895
0.89
0.915
4.07
6560
151.1
2100
1800




4.11
6400
364.08
99.6
3.8
4.15
0.87
0.895
0.885
0.905
4.18
6080
157.9
2100
1820




4.22
6000
364.08
100
2.3
4.27
0.875
0.9
0.89
0.91
4.31
5680
165.4
2100
1850




4.34
5560
364.08
99.6
-1.5
4.38
0.875
0.895
0.88
0.905
4.43
5240
172.9
2030
1930





















</tbody>

[RKturbo]

<colgroup><col span="17"></colgroup><tbody>


Engine Speed
Mass Air Flow
Throttle Valve Angle
Ignition

Engine Speed
Engine Load
Mass Air Flow
Mass Air Flow
Engine Speed
Engine Load
Boost Pressure
Boost Pressure



TIME
(G28)
(G70 + G246)
Timing Angle
TIME
(G28)

(G70) Bank 1
(G246) Bank 2
TIME
(G28)

(specified)
(actual)



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




0.46
2520
35.81
10.2
38.3
0.11
2480
31.6
16.39
19.11
0.28
2480
31.6
1010
1040




0.96
2520
36.39
10.2
38.3
0.62
2520
30.8
16.03
19
0.79
2520
30.8
1010
1040




1.48
2560
100.75
81.2
31.5
1.15
2520
30.8
16.64
18.94
1.32
2560
45.9
2140
1000




1.98
3520
174.72
100
27
1.65
2640
82.7
55.36
58
1.82
2840
91.7
2100
1210




2.48
4680
364.08
100
10.5
2.15
4240
119.5
144.39
131.81
2.32
4560
150.4
2100
1880




2.98
5200
364.08
100
0.8
2.65
4880
179.7
196.86
198.67
2.82
5080
181.2
2030
2070




3.5
5640
364.08
100
10.5
3.15
5360
172.2
201.75
205.92
3.33
5520
168.4
2020
1940




3.98
6040
364.08
100
11.3
3.66
5760
160.2
204.61
210.28
3.82
5920
156.4
2080
1870




4.49
6440
364.08
99.6
21
4.15
6160
151.9
213.53
208
4.33
6280
148.1
2110
1810




4.99
6160
364.08
100
1.5
4.65
6520
142.9
208.19
212.06
4.83
6520
143.6
2100
1790




5.49
4880
364.08
97.6
3
5.15
5680
160.9
207.33
208.58
5.33
5000
175.2
2020
1950




6.02
5120
364.08
100
2.3
5.67
5000
182.7
202.28
206.39
5.84
5040
178.9
2020
2120




6.55
5320
364.08
100
9.8
6.19
5160
173.7
197.58
205.08
6.37
5280
170.7
2020
2010




7.04
5520
364.08
100
10.5
6.71
5360
169.9
206.17
202.83
6.87
5440
168.4
2020
1990




7.54
5680
364.08
100
6
7.2
5560
167.7
212.39
208.58
7.37
5640
165.4
2060
1960




8.06
5880
364.08
100
14.3
7.72
5760
161.7
209.42
211.97
7.89
5800
160.9
2090
1930




8.59
6040
364.08
99.6
12
8.23
5920
157.1
209.31
210
8.4
6000
156.4
2090
1880




9.09
6200
364.08
99.6
18
8.76
6080
154.1
207.69
211.81
8.93
6160
152.6
2090
1870




9.64
6360
364.08
99.6
13.5
9.27
6240
150.4
208.92
206.75
9.46
6320
149.6
2080
1850




10.14
6520
364.08
100
15
9.8
6440
146.6
210.58
208.42
9.96
6480
144.4
2080
1860




10.69
4760
364.08
98
-6.8
10.3
6280
145.9
209.14
203.39
10.52
5520
166.2
2060
1930


</tbody>

[DHall1]

Its perfect.

You have 93 octane fuel?

Thats good timing for the amt of boost.

I like it

[RKturbo]

One thing I do notice is that both runs after the sec cats removed seems down a tiny bit on max boost but also that the boost seems to came on about 200rpm slower. Course sure there are many variables but other than slight increase in air temp runs were identical except the sec cats gone.

[RKturbo]

Yep 93. But thinking about heading to track this weekend and getting a few gallons of race fuel for the heck of it.

[lswing]

Looking good. Seems to not be in Turbo mode so it's tough to see nuances, bit chunky in RPM blocks, but fine. If you do get logs again grab block 112, it would be interesting to see how hot the EGT is running.

[4everRS]

Really nice timing. Good boost. Would probably handle a bit more. Meth injection would make a noticeable difference.

I'm a little surprised the mass air flow didn't really increase after the main cat was removed. I know it sounds a bit different, but does it FEEL faster?

[Bigglezworth]

I'm a little surprised the mass air flow didn't really increase after the main cat was removed. I know it sounds a bit different, but does it FEEL faster?I've drive this tune for over 5 years now and can confirm that yes - it not only feels a bit quicker - it is a bit quicker once you gut your downpipes. The results improve with water/meth injection for sure and also improve when you introduce race gas in to the equation. The boost is optimal for the K04 compressors. More boost equals more heat which quickly hampers the end results. The tune strikes a nice optimal balance IMO.

[4everRS]

I've drive this tune for over 5 years now and can confirm that yes - it not only feels a bit quicker - it is a bit quicker once you gut your downpipes. The results improve with water/meth injection for sure and also improve when you introduce race gas in to the equation. The boost is optimal for the K04 compressors. More boost equals more heat which quickly hampers the end results. The tune strikes a nice optimal balance IMO. good to know. To be clearer, I was wondering the difference between pipes with gutted pre cats, and fully gutted. Op said he already had the pre cat gutted. Tim, can you comment on that or have you always been fully gutted? I have the pre cats gutted now and am wondering if it's worth it to go fully gutted....

[DHall1]

How much difference did you notice on gutting the pre cat



!
good to know. To be clearer, I was wondering the difference between pipes with gutted pre cats, and fully gutted. Op said he already had the pre cat gutted. Tim, can you comment on that or have you always been fully gutted? I have the pre cats gutted now and am wondering if it's worth it to go fully gutted....

[RKturbo]

Well it is hard to tell how much the gutted precats gave alone as I did the ECU burn at the same time. Losing the sec cats... It seems a little quicker but it might be wishful thinking. 10-15HP or so is what Marc thought I would pick up. Kinda hard to feel 10 hp. I think it's the sum of all the parts that gets them to fly. ;)

[hahnmgh63]

364.08 is the highest reading you will see for our Mass flow's combined. The ECU will not read any higher, that is the upper limit. How the ECU adjust the fueling for a lean condition when you are flowing more I don't know. Maybe somebody more knowledgable with the ECU's can answer that. Or do the individual readings go higher, I can't remember?

[4everRS]

364.08 is the highest reading you will see for our Mass flow's combined. The ECU will not read any higher, that is the upper limit. How the ECU adjust the fueling for a lean condition when you are flowing more I don't know. Maybe somebody more knowledgable with the ECU's can answer that. Or do the individual readings go higher, I can't remember?
Individual readings go higher. Each one will go to 364.08. Is log block 2. Just need to add them together

[4everRS]

How much difference did you notice on gutting the pre cat



!
I can tell. Especially in higher rpm. 4th gear above 130 is pretty impressive. It sounds nicer too

[ttboost]

Yep, I did full catless, gutted precats and no main cats. DEFINITELY noticeable...do it if you can...sounds awesome too with SE exhaust...

[4everRS]

Yep, I did full catless, gutted precats and no main cats. DEFINITELY noticeable...do it if you can...sounds awesome too with SE exhaust...
Even better when you remove the resonators....

[ttboost]

Yep, the only thing I had after the turbine was the mufflers...

[makaveli42]

Yep, the only thing I had after the turbine was the mufflers...


I dont even even have the mufflers. Just two nice tips. Love the sound of it! Can hear the turbos spool at every RPM

[fukinavit]

What do you guys use when you remove the main (rear) cats?, do you get an exhaust shop just to throw some old straight pipe in there or is there a good stainless pipe you can get somewhere ?

[ttboost]

I bought some stainless and made my own catless downpipes, gave my stock ones to the guy who bought my car, just in case, as he lived here and had emissions testing too.

[fukinavit]

I bought some stainless and made my own catless downpipes, gave my stock ones to the guy who bought my car, just in case, as he lived here and had emissions testing too.

I already have gutted downpipes, it's the main cats I was thinking of getting rid of.

[lswing]

I already have gutted downpipes, it's the main cats I was thinking of getting rid of.

The gutted DP's are the "rear" as typically referred. What do you guys use when you remove the main (rear) cats?, do you get an exhaust shop just to throw some old straight pipe in there or is there a good stainless pipe you can get somewhere ?

So you are looking to replace the top/pre-cat then I believe. First and smaller one right up by the turbo.

[fukinavit]

Confusion sets in, downpipes to me and all that I've seen are reffered to as the pipes that come "down" from the headers / turbo etc. Anyway, the ones nearest the turbo are allready gutted, just was asking about the rear or main cats.

[4everRS]

The gutted DP's are the "rear" as typically referred.
No. The first cat (sometimes called the pre cat) after the dp is the one that should be referred to as the one "in" the down pipe. However, the dp assembly has both cats in it. The main cat is the large one, which is the second one behind the turbo.

The pre cat takes care of cleaning up the exhaust upon start up, before the main cat gets hot enough.

[lswing]

Confusion sets in, downpipes to me and all that I've seen are reffered to as the pipes that come "down" from the headers / turbo etc. Anyway, the ones nearest the turbo are allready gutted, just was asking about the rear or main cats.

OK, then ttboost's answer was spot on I think. I was just wondering why you questioned his reply as it seemed to answer the question. So yes, just replace with a fitted pipe or hollowed out stock set.

[lswing]

No. The first cat (sometimes called the pre cat) after the dp is the one that should be referred to as the one "in" the down pipe. However, the dp assembly has both cats in it. The main cat is the large one, which is the second one behind the turbo.

The pre cat takes care of cleaning up the exhaust upon start up, before the main cat gets hot enough.

Noted...seems like both the cats are in the DP, but I guess the main/second one downstream is far enough along to be considered in the exhaust and not actual DP.

[4everRS]

Noted...seems like both the cats are in the DP, but I guess the main/second one downstream is far enough along to be considered in the exhaust and not actual DP.
It can be confusing. Personally, I've always considered the downpipe as the whole assembly, therefore both cats are in the downpipe.

Kinda got off topic with this thread.

[fukinavit]

OK, then ttboost's answer was spot on I think. I was just wondering why you questioned his reply as it seemed to answer the question. So yes, just replace with a fitted pipe or hollowed out stock set.

Yes, his was I just misread it, my apologies. Ill just get an exhaust shop to throw a pipe in, Anyway where were we!

[Bigglezworth]

No. The first cat (sometimes called the pre cat) after the dp is the one that should be referred to as the one "in" the down pipe. However, the dp assembly has both cats in it. The main cat is the large one, which is the second one behind the turbo.

The pre cat takes care of cleaning up the exhaust upon start up, before the main cat gets hot enough.I'll clarify slightly more. A pre cat is designed to reduce some of the gas emissions prior to hitting the main cat so as not to damage the main cat. If all of the exhaust gases hit the main cat it causes the main cat to run much hotter which in turn reduces the life of the main cat.

In the attached photo you can see the entire 'downpipe' that includes the pre-cat up high near the turbo, a flex pipe, and finally the main cat.

16538

[PCMacDr]

Can't get any clearer than that

NICE !!

[DHall1]

I think the horse is nice and tender about now.

[RKturbo]

LOL Figures Bigglezworth would have a full on pic of them next to a motor that had been removed. I just had a local exhaust cut the secondary cats out and bend/ weld in some new exhaust tubing. Still have factory resonators and mufflers. They flow decent enough and doubt I am losing much HP there.

[ttboost]

Here are the ones I made. I found some DP's that were "chopped" already. So I just gutted the pre-cats and made the rest with new stainless and new flexies...

http://i90.photobucket.com/albums/k275/mrvetten/RS6/Engine%20back%20in%204_zps2gt1zlnr.jpg (http://s90.photobucket.com/user/mrvetten/media/RS6/Engine%20back%20in%204_zps2gt1zlnr.jpg.html)

http://i90.photobucket.com/albums/k275/mrvetten/RS6/Engine%20back%20in%201%20-%20Exhaust_zpsqwcgs76m.jpg (http://s90.photobucket.com/user/mrvetten/media/RS6/Engine%20back%20in%201%20-%20Exhaust_zpsqwcgs76m.jpg.html)

[lswing]

^^^Ah, very nice...what's that funny shifter thing?:incar:

This looks so much cleaner...since we're off topic.

http://audirssix.com/images/Audi-RS6-EngineDrawing2.jpg?lbisphpreq=1

[Bigglezworth]

What is "Actual Atmospheric Pressure" in Tampa? Safe to assume it's around 990-1000mbar? I only ask as reading logs for boost depends on which part of the continent you live in. In Calgary, my AAP is 890 mbar.

[lswing]

What is "Actual Atmospheric Pressure" in Tampa? Safe to assume it's around 990-1000mbar? I only ask as reading logs for boost depends on which part of the continent you live in. In Calgary, my AAP is 890 mbar.

Florida looks to be right around 1000 mbar, give or take 50...based off a quick calculation.

[hahnmgh63]

Sealevel, standard atmospheric day is 15'C and 1013.25 mbar (14.7psi). Approx standard temp lapse rate is 2'C per 1000' of elevation, not a standard pressure laps since it is progressive. So temps and High or Low pressure systems in the vicinity make a bit of a difference and obviously altitude makes a large difference.

[Bigglezworth]

Sealevel, standard atmospheric day is 15'C and 1013.25 mbar (14.7psi). Approx standard temp lapse rate is 2'C per 1000' of elevation, not a standard pressure laps since it is progressive. So temps and High or Low pressure systems in the vicinity make a bit of a difference and obviously altitude makes a large difference.Yes I know that. Was just wanting to know what AAP was in Tampa was all. Calgary is 3650ft in altitude and I lose a nominal 3/10ths of a second in 1/4 mile time as a result of the thinner air. I've always used 1 sec/5000ft for a NA car and 0.4sec/5000ft for a FI car for quick altitude adjusment calc's.