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Old 10-04-2013, 09:55 AM   #1
Bad Noodle
Scooby Specialist
 
Member#: 174442
Join Date: Mar 2008
Chapter/Region: Tri-State
Location: NNJ
Vehicle:
2007 SuperWagon
I don't spell well

Default Roughness / Backfire @ 5500 rpm - need some input

I'm almost done with this setup but things just keep coming up. I'd like to get some of your guys' ideas while I go over the car and check everything mechanical.

I was finishing tuning the upper voltage of the maf when I went for a run and the car felt jerky and backfired twice at the upper rpms, around 5500. This is where I was finishing the maf tuning. I reduced the g/s at 4.62 volts from 364 g/s to 357 g/s. This got the arf from 10.5 to the target 10.8.

Log:

Code:
Time    CL/OL    Load    rpm    fbkc    IDC    psi    mafv    throt    wbO2
1779    10    1.22    2028    0    9.47    0.29    2.48    97.34    19.74
1827    10    1.25    2038    0    9.57    0.29    2.48    99.96    19.74
1863    10    1.27    2084    0    9.68    0.29    2.46    100.1    13.79
1907    10    1.27    2060    0    10.2    0.44    2.44    100.1    13.79
1961    10    1.28    2068    0    10.18    0.44    2.42    100.1    13.38
2000    10    1.29    2106    0    10.23    0.44    2.46    100.1    13.42
2050    10    1.28    2100    0    10.38    0.58    2.5    100.1    13.42
2098    10    1.3    2111    0    10.29    0.58    2.48    99.96    13.26
2150    10    1.31    2134    0    10.39    0.73    2.46    100.1    13.26
2193    10    1.31    2136    0    10.53    0.73    2.46    100.1    13.22
2223    10    1.31    2152    0    10.49    0.73    2.52    100.1    13.22
2279    10    1.31    2144    0    10.58    0.87    2.5    99.96    13.22
2322    10    1.32    2165    0    10.67    0.87    2.48    99.96    13.22
2373    10    1.32    2190    0    10.66    1.02    2.54    99.96    13.16
2422    10    1.32    2176    0    10.75    1.02    2.52    99.96    13.13
2466    10    1.33    2191    0    10.79    1.02    2.5    99.96    13.13
2514    10    1.33    2222    0    10.81    1.16    2.56    99.96    13.04
2562    10    1.33    2228    0    10.94    1.16    2.52    99.96    13.04
2593    10    1.33    2215    0    10.93    1.16    2.56    99.96    13.04
2643    10    1.34    2258    0    10.95    1.31    2.56    99.96    13.04
2692    10    1.34    2274    0    11.08    1.31    2.54    99.96    13.16
2743    10    1.34    2254    0    11.13    1.45    2.58    99.96    13.16
2788    10    1.35    2278    0    11.21    1.45    2.54    99.96    13.14
2836    10    1.36    2315    0    11.26    1.45    2.6    99.96    13.2
2884    10    1.36    2305    0    11.74    1.6    2.56    99.96    13.2
2932    10    1.37    2321    0    11.81    1.6    2.62    99.96    13.13
2963    10    1.38    2336    0    12.01    1.74    2.62    100.1    13.13
3008    10    1.38    2337    0    12    1.74    2.6    99.96    13.16
3059    10    1.38    2356    0    11.96    1.74    2.66    99.96    13.16
3106    10    1.39    2391    0    12.12    1.89    2.6    100.1    13.16
3160    10    1.39    2388    0    12.25    1.89    2.66    99.96    13.23
3203    10    1.4    2373    0    12.21    2.03    2.68    99.96    13.23
3250    10    1.4    2400    0    12.33    2.03    2.62    99.96    13.35
3298    10    1.41    2414    0    12.34    2.18    2.68    99.96    13.35
3331    10    1.41    2435    0    12.36    2.18    2.72    99.96    13.39
3373    10    1.41    2446    0    12.41    2.32    2.66    99.96    13.39
3427    10    1.42    2466    0    12.59    2.32    2.66    99.96    13.39
3475    10    1.42    2477    0    12.67    2.32    2.72    99.96    13.6
3522    10    1.44    2466    0    12.7    2.47    2.76    99.96    13.6
3572    10    1.44    2488    0    12.78    2.47    2.74    99.96    13.47
3618    10    1.44    2509    0    12.92    2.61    2.7    100.1    13.47
3662    10    1.44    2509    0    12.93    2.61    2.7    100.1    13.42
3698    10    1.44    2530    0    13.4    2.76    2.7    100.1    13.42
3746    10    1.45    2552    0    13.57    2.76    2.76    99.96    13.61
3795    10    1.46    2547    0    13.6    2.76    2.78    99.96    13.61
3844    10    1.45    2570    0    13.64    2.9    2.82    99.96    13.61
3890    10    1.47    2593    0    13.78    2.9    2.82    99.96    13.74
3938    10    1.48    2598    0    13.85    3.05    2.84    99.96    13.74
3987    10    1.49    2621    0    13.92    3.05    2.84    99.96    13.8
4034    10    1.49    2632    0    14.01    3.19    2.88    99.96    13.8
4063    10    1.5    2640    0    14.05    3.19    2.86    99.96    13.69
4118    10    1.52    2660    0    14.12    3.34    2.86    99.96    13.69
4161    10    1.52    2670    0    14.2    3.34    2.84    99.96    13.67
4205    10    1.52    2690    0    15    3.48    2.82    99.96    13.67
4263    10    1.54    2701    0    15.08    3.63    2.82    99.96    13.79
4307    10    1.55    2714    0    15.12    3.63    2.86    99.96    13.69
4358    10    1.55    2750    0    15.22    3.77    2.92    99.96    13.69
4403    10    1.57    2758    0    15.29    3.77    2.94    99.96    13.67
4435    10    1.58    2784    0    15.36    3.92    2.9    99.96    13.67
4484    10    1.59    2796    0    15.41    3.92    2.88    99.96    13.67
4532    10    1.59    2790    0    16.03    4.06    2.98    99.96    13.67
4578    10    1.61    2808    0    16.12    4.21    3    99.96    13.8
4630    10    1.62    2826    0    16.35    4.35    2.9    99.96    13.8
4679    10    1.62    2856    0    16.41    4.5    2.98    99.96    13.8
4722    10    1.65    2865    0    16.48    4.5    3    99.96    13.67
4770    10    1.67    2888    0    17.09    4.64    2.92    99.96    13.67
4797    10    1.68    2892    0    17.28    4.79    3.08    99.96    13.6
4849    10    1.68    2892    0    17.4    4.79    2.96    99.96    13.6
4902    10    1.7    2935    0    17.47    4.93    3.06    99.96    13.73
4951    10    1.73    2958    0    18.15    5.08    3    100.1    13.64
4995    10    1.72    2949    0    18.22    5.22    3.12    100.1    13.64
5042    10    1.75    2966    0    18.41    5.37    3.02    99.96    13.55
5095    10    1.78    3004    0    18.51    5.51    3.14    99.96    13.55
5139    10    1.8    3006    0    19.2    5.66    3.02    99.96    13.48
5171    10    1.8    3012    0    19.25    5.8    3.16    99.96    13.48
5218    10    1.82    3046    0    19.46    5.95    3.14    99.96    13.29
5270    10    1.85    3062    0    20.07    6.09    3.08    99.96    13.29
5313    10    1.86    3076    0    20.27    6.24    3.24    99.96    13.2
5363    10    1.87    3101    0    20.43    6.38    3.2    99.96    13.01
5416    10    1.9    3104    0    21.11    6.67    3.12    99.96    13.01
5458    10    1.93    3122    0    21.45    6.82    3.16    99.96    13.14
5506    10    1.93    3160    0    21.41    6.96    3.26    99.96    13.14
5539    10    1.97    3153    0    22.13    7.25    3.32    99.96    13.05
5588    10    2.01    3202    0    22.45    7.4    3.26    99.96    13.05
5635    10    2.01    3198    0    22.47    7.55    3.24    99.96    12.74
5678    10    2.02    3234    0    23.37    7.84    3.2    99.96    12.74
5729    10    2.06    3230    0    24.05    8.13    3.2    99.96    12.79
5779    10    2.1    3272    0    24.37    8.27    3.22    99.96    12.54
5825    10    2.1    3260    0    25.02    8.56    3.24    99.96    12.54
5872    10    2.14    3308    0    25.97    8.85    3.26    99.96    12.57
5906    10    2.17    3314    0    26.09    9.14    3.32    99.96    12.57
5954    10    2.22    3334    0    26.99    9.43    3.34    99.96    12.45
6002    10    2.22    3340    0    27.77    9.72    3.4    99.96    12.45
6049    10    2.26    3389    0    28.79    10.01    3.5    99.96    12.29
6104    10    2.31    3418    0    29.07    10.45    3.54    99.96    12.13
6151    10    2.3    3392    0    29.76    10.74    3.46    99.96    12.13
6198    10    2.37    3438    0    30.71    11.17    3.44    99.96    11.98
6243    10    2.42    3468    0    31.61    11.61    3.54    100.1    11.98
6278    10    2.46    3467    0    32.62    12.04    3.64    99.96    11.42
6321    10    2.46    3502    0    33.48    12.48    3.52    99.96    11.42
6370    10    2.53    3522    0    34.32    13.06    3.66    100.1    11.27
6419    10    2.6    3536    0    36.24    13.49    3.68    100.1    11.27
6467    10    2.6    3584    0    37.31    14.07    3.66    100.1    11.22
6520    10    2.68    3608    0    38.32    14.8    3.78    100.1    11.32
6563    10    2.76    3620    0    40.12    15.24    3.74    99.96    11.32
6611    10    2.85    3630    0    40.94    15.96    3.84    99.96    11.25
6647    10    2.85    3666    0    42.84    16.69    3.86    99.96    11.25
6690    10    2.95    3722    0    44.42    17.27    3.84    99.96    11.13
6742    10    3.06    3738    0    46.98    17.85    3.96    99.96    11.13
6788    10    3.06    3763    0    47.97    18.72    4    99.96    11.13
6833    10    3.19    3788    0    49.11    19.15    3.96    99.96    10.95
6885    10    3.29    3815    0    51.23    19.59    3.96    99.96    10.95
6929    10    3.38    3819    0    52.78    20.17    4.02    100.1    10.97
6975    10    3.38    3874    0    54.46    20.31    4.08    100.1    10.97
7009    10    3.45    3892    0    53.89    20.46    4.08    100.1    10.95
7058    10    3.47    3912    0    55.85    20.46    4.1    99.96    10.95
7104    10    3.47    3971    0    55.47    20.6    4.12    99.96    10.92
7158    10    3.47    3973    0    54.43    20.31    4.1    99.96    10.92
7202    10    3.48    4014    0    55.18    20.17    4.04    99.96    10.97
7250    10    3.44    4071    0    56.03    20.02    4.04    99.96    10.94
7297    10    3.44    4093    0    54    19.88    4.1    99.96    10.94
7349    10    3.4    4124    0    54.49    19.59    4.1    99.96    11.02
7379    10    3.38    4120    0    56.56    19.44    4.08    99.96    11.02
7425    10    3.39    4162    0    55.69    19.59    4.1    99.96    11.07
7473    10    3.39    4173    0    56.2    19.3    4.14    99.96    11.07
7521    10    3.4    4243    0    57.3    19.3    4.08    100.1    11.01
7570    10    3.39    4265    0    58.2    19.44    4.16    99.96    11.01
7617    10    3.4    4267    0    56.89    19.3    4.12    99.96    10.88
7666    10    3.4    4298    0    57.5    19.3    4.14    99.96    10.94
7712    10    3.41    4359    0    60.17    19.59    4.12    99.96    10.94
7741    10    3.42    4338    0    59.63    19.59    4.16    99.96    10.69
7793    10    3.42    4390    0    58.63    19.59    4.18    99.96    10.69
7842    10    3.44    4430    0    61.42    19.73    4.16    99.96    10.69
7890    10    3.46    4430    0    61.31    19.88    4.18    99.96    10.69
7937    10    3.46    4510    0    60.93    19.73    4.2    99.96    10.6
7986    10    3.46    4488    0    61.5    19.88    4.2    100.1    10.78
8033    10    3.47    4535    0    63.28    20.02    4.24    99.96    10.78
8080    10    3.46    4548    0    62.4    20.02    4.26    99.96    10.75
8108    10    3.46    4598    0    62.27    20.02    4.24    99.96    10.75
8157    10    3.47    4615    0    63.86    20.17    4.24    99.96    10.76
8214    10    3.45    4659    0    63.2    20.17    4.26    99.96    10.76
8257    10    3.44    4634    0    62.8    20.02    4.22    99.96    10.69
8307    10    3.44    4717    0    65.19    20.17    4.24    99.96    10.69
8347    10    3.44    4716    0    64.23    20.17    4.28    99.96    10.73
8401    10    3.43    4730    0    63.85    20.17    4.28    99.96    10.75
8448    10    3.43    4775    0    64.73    20.17    4.28    99.96    10.75
8484    10    3.45    4806    0    66.46    20.31    4.28    99.96    10.66
8525    10    3.44    4788    0    66.02    20.46    4.34    99.96    10.66
8571    10    3.44    4870    0    65.69    20.31    4.28    99.96    10.7
8619    10    3.46    4925    0    66.47    20.46    4.32    99.96    10.7
8673    10    3.46    4888    0    67.18    20.6    4.34    100.1    10.61
8721    10    3.46    4920    0    66.22    20.46    4.32    99.96    10.86
8768    10    3.46    4982    0    67.94    20.46    4.32    99.96    10.86
8816    10    3.45    4998    0    68.92    20.6    4.36    99.96    10.78
8848    10    3.45    5031    0    66.98    20.46    4.34    99.96    10.78
8897    10    3.45    5024    0    68.72    20.31    4.34    99.96    10.78
8945    10    3.45    5039    0    70.36    20.46    4.38    99.96    10.78
8991    10    3.45    5064    0    69.44    20.6    4.38    99.96    10.79
9035    10    3.47    5097    0    69.06    20.31    4.36    99.96    10.79
9088    10    3.46    5120    0    71.42    20.46    4.38    99.96    10.79
9136    10    3.46    5163    0    71.01    20.46    4.4    99.96    10.75
9179    10    3.47    5206    0    70.06    20.46    4.4    99.96    10.75
9217    10    3.47    5236    0    71.19    20.31    4.4    99.96    10.85
9265    10    3.47    5267    0    71.97    20.46    4.42    99.96    10.85
9313    10    3.47    5242    0    71    20.46    4.4    100.1    10.91
9361    10    3.46    5250    0    71.1    20.31    4.4    100.1    10.91
9409    10    3.46    5312    0    72.8    20.31    4.42    100.1    10.86
9452    10    3.45    5285    0    72.17    20.6    4.42    99.96    10.69
9505    10    3.45    5355    0    70.86    20.31    4.4    99.96    10.69
9554    10    3.43    5400    0    73.09    20.31    4.44    99.96    10.75
9584    10    3.43    5412    0    73.31    20.46    4.44    99.96    10.75
9633    10    3.43    5464    0    70.43    20.17    4.4    100.1    10.73
9681    10    3.39    5395    0    59.75    20.02    4.18    100.1    10.73
9730    10    3.39    5558    0    71.02    19.88    4.42    100.1    10.72
9781    10    3.25    5517    0    72.81    19.88    4.46    100.1    10.72
9826    10    3.35    5504    0    71.85    19.73    4.4    99.96    10.95
9872    10    3.36    5599    0    72.98    19.73    4.44    99.96    10.86
9920    10    3.36    5573    0    74.47    19.88    4.48    99.96    10.86
9952    10    3.36    5554    0    74.01    19.73    4.46    99.96    10.76
10001    10    3.38    5635    0    71.68    19.88    4.38    99.96    10.76
10043    10    3.39    5707    0    74.01    19.73    4.48    99.96    10.8
10097    10    3.3    5610    0    73.98    19.88    4.46    99.96    10.8
10149    10    3.35    5648    0    73.28    20.02    4.42    99.96    10.76
10187    10    3.34    5736    0    75.13    20.17    4.48    100.1    10.82
10235    10    3.34    5698    0    74.96    20.17    4.48    100.1    10.82
10288    10    3.34    5735    0    75.36    20.17    4.46    100.1    10.85
10327    10    3.36    5763    0    77.7    20.17    4.48    99.96    10.85
10363    10    3.36    5798    0    75.93    20.31    4.52    100.1    10.83
10411    10    3.36    5752    0    74.94    20.17    4.48    100.1    10.83
10464    10    3.32    5845    0    77.1    20.02    4.48    99.96    10.76
10513    10    3.33    5807    0    76.84    20.31    4.52    100.1    10.76
10563    10    3.34    5983    0    76.61    20.31    4.5    100.1    10.79
10609    10    3.32    6407    0    58.77    17.7    4.52    100.1    10.76






Mods:
DIY rotated turbo kit
Stock headers w GS xpipe
PE 5857
PE 46mm EWG
Modded stock 800cc injectors
3" CAI
Sti Tmic
Crawford AOS
Perrin Fuel Rails
Stock Block Stock heads
+ Other supporting mods (TGVs ect)

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Old 10-04-2013, 10:03 AM   #2
Bad Noodle
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Member#: 174442
Join Date: Mar 2008
Chapter/Region: Tri-State
Location: NNJ
Vehicle:
2007 SuperWagon
I don't spell well

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For reference this was last night:



The only thing I changed was the upper maf g/s by around -2% and some tip-in values that I'm playing with
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Old 10-04-2013, 11:07 AM   #3
Bad Noodle
Scooby Specialist
 
Member#: 174442
Join Date: Mar 2008
Chapter/Region: Tri-State
Location: NNJ
Vehicle:
2007 SuperWagon
I don't spell well

Default

So after starring at it for a while I got this:

MAF voltage blips (4.45 -> 4.18 -> 4.45 at time 9681.

So now, why would it do that?
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Old 10-04-2013, 12:00 PM   #4
Bad Noodle
Scooby Specialist
 
Member#: 174442
Join Date: Mar 2008
Chapter/Region: Tri-State
Location: NNJ
Vehicle:
2007 SuperWagon
I don't spell well

Default

Could have been a loose hose clamp on a coupler. I retightened everything, did another run, and didn't see the same dip in mafV
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Old 10-04-2013, 02:40 PM   #5
tomtom84
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Join Date: Dec 2007
Location: o-k-l-a-h-o-m-a
Vehicle:
06 wrx wagon 6spd
'91-meotter -h6 swap?

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nice setup.

I just put a 5857 on my sti and road tuned it (no real hp estimates yet) What size hotside? I am using a .63
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Old 10-04-2013, 03:07 PM   #6
Bad Noodle
Scooby Specialist
 
Member#: 174442
Join Date: Mar 2008
Chapter/Region: Tri-State
Location: NNJ
Vehicle:
2007 SuperWagon
I don't spell well

Default

^ Same, VBands all the way around.

So far, I like it. does not run out of steam up top
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