Speedtoys

To work on fuel map, and then timing for WOT, I had time to do these, but not smog pump "loss", I will in may at May at Sonoma...I had races to manage and those were secondary jobs.

Charts later..after I get down to print them out, and get raw data.

Found 11Hp and 17FtLbs at WOT, that'll be a good start to begin logging on the street once I get the plug from WB to the STuner working consistently.

I log 8-10 Knocks per run, all minor at this point, up to 1.5deg retard max here & there.

merchauser

you should be happy with those results; good going.

Speedtoys

Mostly so, there is some room in the corners here and there, lots of street data logging to work on all of the area below the curve on, dyno tuning is not the end all.

Speedtoys

Crap image from the dyno software, the dyno printer died. This is the progress for the weekend.

Speedtoys

Raw Data because some people follow it:
Before:
RunFile_014.drf: 75.86 ∞F 29.48 in-Hg Humidity: 20 % SAE: 1.00 Average Gear Ratio: 56.10

s RPM x1000 hp ft-lbs Air/Fuel
0.37 1.90 N/A N/A 14.56
0.45 1.95 70.14 188.63 13.91
0.57 2.00 75.50 198.25 13.44
0.76 2.05 81.51 208.81 14.04
0.96 2.10 86.44 216.19 13.98
1.18 2.15 90.77 221.74 13.44
1.41 2.20 93.86 224.08 13.01
1.61 2.25 96.91 226.21 13.07
1.80 2.30 100.31 229.05 13.07
1.99 2.35 103.41 231.11 13.13
2.17 2.40 105.84 231.63 13.22
2.34 2.45 107.76 231.00 13.24
2.49 2.50 109.26 229.54 13.25
2.60 2.55 112.52 231.74 13.25
2.72 2.60 116.19 234.72 13.30
2.84 2.65 119.36 236.55 13.37
2.95 2.70 123.28 239.81 13.46
3.07 2.75 126.74 242.05 13.58
3.17 2.80 130.57 244.91 13.66
3.28 2.85 134.66 248.14 13.66
3.39 2.90 138.48 250.80 13.64
3.50 2.95 142.01 252.83 13.68
3.61 3.00 146.15 255.86 13.76
3.71 3.05 149.89 258.10 13.82
3.81 3.10 154.17 261.19 13.78
3.91 3.15 158.96 265.03 13.70
4.01 3.20 162.93 267.42 13.63
4.12 3.25 166.03 268.30 13.54
4.23 3.30 169.58 269.89 13.49
4.34 3.35 172.17 269.93 13.50
4.46 3.40 173.02 267.27 13.54
4.57 3.45 174.16 265.14 13.51
4.69 3.50 175.39 263.20 13.41
4.82 3.55 176.34 260.89 13.38
4.94 3.60 175.86 256.57 13.43
5.07 3.65 175.20 252.10 13.47
5.19 3.70 176.44 250.45 13.46
5.28 3.75 183.27 256.65 13.45
5.38 3.80 189.30 261.64 13.42
5.49 3.85 192.84 263.07 13.38
5.60 3.90 196.50 264.63 13.38
5.70 3.95 199.98 265.91 13.44
5.80 4.00 203.40 267.07 13.49
5.90 4.05 207.38 268.93 13.43
6.01 4.10 210.33 269.44 13.32
6.11 4.15 214.14 271.00 13.26
6.21 4.20 218.20 272.86 13.28
6.32 4.25 220.95 273.05 13.31
6.42 4.30 223.62 273.13 13.29
6.53 4.35 225.89 272.73 13.25
6.63 4.40 228.78 273.08 13.23
6.74 4.45 231.09 272.75 13.26
6.85 4.50 232.40 271.25 13.29
6.96 4.55 233.45 269.48 13.28
7.06 4.60 235.14 268.48 13.25
7.18 4.65 237.11 267.81 13.21
7.29 4.70 238.77 266.82 13.16
7.40 4.75 240.76 266.21 13.12
7.52 4.80 240.64 263.31 13.08
7.63 4.85 240.04 259.94 13.06
7.75 4.90 241.57 258.93 13.07
7.86 4.95 242.50 257.30 13.09
7.97 5.00 243.98 256.29 13.09
8.09 5.05 246.57 256.44 13.04
8.20 5.10 247.61 255.00 12.96
8.32 5.15 248.70 253.63 12.86
8.44 5.20 250.45 252.96 12.77
8.56 5.25 252.13 252.24 12.75
8.68 5.30 252.70 250.42 12.75
8.79 5.35 254.42 249.77 12.71
8.92 5.40 255.78 248.78 12.63
9.04 5.45 257.26 247.92 12.51
9.16 5.50 258.54 246.89 12.35
9.28 5.55 260.00 246.04 12.20
9.40 5.60 261.37 245.13 12.06
9.52 5.65 262.95 244.44 11.97
9.65 5.70 262.92 242.27 12.05
9.77 5.75 263.43 240.62 12.11
9.90 5.80 264.09 239.15 11.99
10.04 5.85 261.21 234.51 11.82
10.17 5.90 262.18 233.40 11.76
10.31 5.95 260.83 230.23 11.80
10.43 6.00 265.60 232.49 11.95
10.58 6.05 264.76 229.85 12.19
10.70 6.10 263.43 226.81 12.40
10.84 6.15 265.38 226.64 12.56
11.00 6.20 260.44 220.63 12.48
11.14 6.25 259.58 218.14 12.45
11.29 6.30 258.51 215.51 12.54
11.43 6.35 257.39 212.89 12.45
11.59 6.40 254.86 209.15 12.31
11.76 6.45 250.18 203.72 13.82
--------- --------- --------- --------- ---------
MAX: 11.76 6.45 265.60 273.13 14.56
MIN: 0.37 1.90 70.14 188.63 11.76


After:
RunFile_033.drf: 81.61 ∞F 29.53 in-Hg Humidity: 24 % SAE: 1.00 Average Gear Ratio: 54.31

s RPM x1000 hp ft-lbs Air/Fuel
1.13 2.05 75.34 192.85 13.79
1.19 2.10 82.50 206.21 14.02
1.28 2.15 89.53 218.68 14.42
1.39 2.20 95.54 228.06 14.18
1.52 2.25 101.43 236.76 13.30
1.73 2.30 105.87 241.75 12.76
1.89 2.35 108.89 243.35 12.63
2.08 2.40 111.42 243.83 12.48
2.27 2.45 113.59 243.50 12.52
2.44 2.50 115.39 242.41 12.59
2.57 2.55 117.63 242.28 12.63
2.68 2.60 121.37 245.17 12.62
2.79 2.65 125.03 247.80 12.55
2.90 2.70 128.74 250.41 12.50
3.01 2.75 132.65 253.34 12.51
3.12 2.80 136.71 256.43 12.53
3.23 2.85 141.18 260.17 12.54
3.33 2.90 145.19 262.95 12.53
3.43 2.95 149.44 266.04 12.52
3.54 3.00 154.22 269.99 12.52
3.64 3.05 158.29 272.56 12.52
3.74 3.10 162.37 275.08 12.53
3.83 3.15 167.03 278.49 12.54
3.93 3.20 171.57 281.58 12.55
4.04 3.25 175.26 283.22 12.54
4.14 3.30 177.92 283.16 12.50
4.25 3.35 180.42 282.86 12.50
4.36 3.40 182.27 281.57 12.55
4.47 3.45 183.98 280.08 12.59
4.58 3.50 185.52 278.40 12.63
4.70 3.55 186.74 276.28 12.65
4.81 3.60 187.78 273.97 12.70
4.94 3.65 187.64 270.02 12.76
5.04 3.70 190.02 269.73 12.81
5.14 3.75 196.19 274.76 12.85
5.24 3.80 200.81 277.54 12.88
5.34 3.85 205.21 279.94 12.88
5.44 3.90 209.03 281.51 12.85
5.54 3.95 212.21 282.16 12.84
5.64 4.00 216.59 284.38 12.87
5.74 4.05 220.22 285.59 12.91
5.84 4.10 223.28 286.02 12.94
5.94 4.15 227.51 287.93 12.94
6.05 4.20 230.26 287.94 12.92
6.14 4.25 233.00 287.94 12.89
6.25 4.30 236.34 288.67 12.85
6.35 4.35 237.72 287.03 12.83
6.45 4.40 240.17 286.67 12.87
6.55 4.45 242.68 286.43 12.90
6.65 4.50 244.66 285.55 12.88
6.76 4.55 246.42 284.45 12.79
6.87 4.60 246.38 281.31 12.69
6.97 4.65 247.68 279.75 12.59
7.08 4.70 248.99 278.24 12.48
7.19 4.75 250.09 276.53 12.50
7.30 4.80 250.55 274.15 12.60
7.41 4.85 251.69 272.56 12.67
7.52 4.90 253.31 271.52 12.70
7.63 4.95 253.67 269.16 12.71
7.74 5.00 254.55 267.39 12.69
7.86 5.05 256.64 266.92 12.66
7.97 5.10 257.39 265.08 12.63
8.09 5.15 258.16 263.28 12.62
8.20 5.20 260.08 262.69 12.57
8.31 5.25 261.45 261.56 12.45
8.43 5.30 262.05 259.68 12.35
8.54 5.35 264.56 259.72 12.43
8.66 5.40 265.49 258.23 12.61
8.78 5.45 267.82 258.09 12.75
8.90 5.50 267.84 255.77 12.84
9.01 5.55 268.24 253.85 12.79
9.13 5.60 271.30 254.45 12.55
9.26 5.65 271.97 252.82 12.33
9.37 5.70 272.02 250.64 12.37
9.49 5.75 275.51 251.65 12.46
9.62 5.80 274.27 248.36 12.51
9.74 5.85 275.03 246.93 12.49
9.87 5.90 274.99 244.80 12.31
10.01 5.95 269.83 238.19 12.05
10.14 6.00 267.57 234.22 12.00
10.28 6.05 266.01 230.93 12.02
10.42 6.10 264.66 227.87 12.02
10.56 6.15 263.58 225.10 12.02
10.71 6.20 260.41 220.60 12.05
10.86 6.25 257.08 216.04 12.06
11.01 6.30 256.95 214.21 12.04
11.16 6.35 255.01 210.92 12.00
11.32 6.40 252.73 207.40 12.10
11.48 6.45 248.93 202.70 13.86
--------- --------- --------- --------- ---------
MAX: 11.48 6.45 275.51 288.67 14.42
MIN: 1.13 2.05 75.34 192.85 12.00

IcemanG17

Good numbers...928's like fuel thats for sure!!

FredR

Jeff,

When you can see daylight between the before and after curves that is a good result in my book. The way I tend to look at such curves is to look at the torque peaks on the before curve and see where they occur on the new curve- in your case it is about 400 rpms earlier and that is significant in terms of "feel" I would suggest.

When I did my S4 I found that the motor needed a bit more fuel mid range and a bit less at the top end but the main difference was in the ignition timing wherein I added quite a bit of advance mid range. I also have a fast exhaust system and that perhaps explains why on top end I could add little to nothing and in one cell I even had to pull it back a little. It would be interesting to get an overview of what you did.

The Forgotten On

Jeff's car is as stock as an 87 can be engine wise. Complete with a full factory 87 exhaust with the large resonators.

I'm curious as well

John Speake

You should be able to also add more advance in the low to medium load/rpm range. This won't give you dyno bragging rights, but the improvement in the pickup and mid range umpff gives lots of typical driving pleasure :-)

Speedtoys

Ive added round..2d above 60% load down to 30% load..I need to do a lot in there.

A good drive without doing WOT up and down Highway9 this weekend would be a good logging session...need to again fix the WB input to the ST (Crap plug), and lower the WB-Law data a tad to match the gauge reading...apparently its a common AEM issue

Speedtoys

Here is a better view...just ran out of time.

https://docs.google.com/spreadsheets...it?usp=sharing

John Speake

Yes, that's it. You should be able to add at least 3 deg advance in the mid range 30% to 60%. It can make a big difference in the response.

IcemanG17

I wonder what the curves look like on 928's that dyno very high stock...like Sharky or Petty Jr 87 auto that made 290whp on Kevins dynojet....