abec
Wil
So my car now runs a programmable fuel system.
When it was being tuned the hp started getting jagged. My tuner wanted me to get the distributor checked out before I get it back on the dyno.
Then I got conflicting information saying that its normal and that the electronic distributors on the X are just about bullet proof, and that the coil is the weak link typically. Also that it should be expected that power band on the X should be jagged at high RPM's due to engine vibration.
The engine in question is reasonably modified, big valve head, 10.5:1 compression, stock cams, everything has been lighted and balanced.
I believe its safe to assume that my current dyno numbers are way below what they should be. I know that spending as much $$ as I have with out getting a significant gain is kind of a let down, so I hope with a leaner tune I can reach my target power I just don't want to blow the motor if something is wrong.
I don't have a JPG but I do have the graph data.
RunFile_001.drf: 88.69∞F 30.07in-Hg Humidity:27% STD:1.02 Average Gear Ratio:69.03
s RPM x1000 hp ft-lbs
0.28 2.40 N/A N/A
2.55 2.50 35.70 75.00
2.94 2.60 37.94 76.65
3.37 2.70 39.60 77.03
3.77 2.80 40.88 76.68
4.19 2.90 42.99 77.85
4.62 3.00 44.57 78.03
5.04 3.10 45.94 77.83
5.44 3.20 46.87 76.93
5.89 3.30 48.14 76.62
6.30 3.40 49.41 76.33
6.76 3.50 50.99 76.51
7.18 3.60 52.50 76.59
7.59 3.70 53.73 76.27
8.04 3.80 54.85 75.81
8.46 3.90 56.29 75.81
8.92 4.00 57.73 75.80
9.35 4.10 59.06 75.65
9.78 4.20 60.11 75.17
10.20 4.30 62.12 75.88
10.64 4.40 63.38 75.65
11.09 4.50 64.90 75.75
11.55 4.60 65.89 75.23
11.96 4.70 67.14 75.03
12.43 4.80 68.73 75.20
12.83 4.90 68.95 73.90
13.32 5.00 70.66 74.22
13.78 5.10 71.29 73.42
14.22 5.20 72.68 73.41
14.70 5.30 72.91 72.25
15.15 5.40 72.24 70.26
15.64 5.50 73.03 69.74
16.13 5.60 72.88 68.35
16.64 5.70 72.74 67.02
17.18 5.80 73.12 66.22
17.70 5.90 71.12 63.31
18.26 6.00 70.75 61.93
18.80 6.10 70.35 60.57
19.39 6.20 68.69 58.19
20.00 6.30 66.56 55.49
20.65 6.40 64.98 53.32
21.31 6.50 63.54 51.34
21.99 6.60 65.01 51.74
--------- --------- --------- ---------
MAX: 21.99 6.60 73.12 78.03
MIN: 0.28 2.40 35.70 51.34
When it was being tuned the hp started getting jagged. My tuner wanted me to get the distributor checked out before I get it back on the dyno.
Then I got conflicting information saying that its normal and that the electronic distributors on the X are just about bullet proof, and that the coil is the weak link typically. Also that it should be expected that power band on the X should be jagged at high RPM's due to engine vibration.
The engine in question is reasonably modified, big valve head, 10.5:1 compression, stock cams, everything has been lighted and balanced.
I believe its safe to assume that my current dyno numbers are way below what they should be. I know that spending as much $$ as I have with out getting a significant gain is kind of a let down, so I hope with a leaner tune I can reach my target power I just don't want to blow the motor if something is wrong.
I don't have a JPG but I do have the graph data.
RunFile_001.drf: 88.69∞F 30.07in-Hg Humidity:27% STD:1.02 Average Gear Ratio:69.03
s RPM x1000 hp ft-lbs
0.28 2.40 N/A N/A
2.55 2.50 35.70 75.00
2.94 2.60 37.94 76.65
3.37 2.70 39.60 77.03
3.77 2.80 40.88 76.68
4.19 2.90 42.99 77.85
4.62 3.00 44.57 78.03
5.04 3.10 45.94 77.83
5.44 3.20 46.87 76.93
5.89 3.30 48.14 76.62
6.30 3.40 49.41 76.33
6.76 3.50 50.99 76.51
7.18 3.60 52.50 76.59
7.59 3.70 53.73 76.27
8.04 3.80 54.85 75.81
8.46 3.90 56.29 75.81
8.92 4.00 57.73 75.80
9.35 4.10 59.06 75.65
9.78 4.20 60.11 75.17
10.20 4.30 62.12 75.88
10.64 4.40 63.38 75.65
11.09 4.50 64.90 75.75
11.55 4.60 65.89 75.23
11.96 4.70 67.14 75.03
12.43 4.80 68.73 75.20
12.83 4.90 68.95 73.90
13.32 5.00 70.66 74.22
13.78 5.10 71.29 73.42
14.22 5.20 72.68 73.41
14.70 5.30 72.91 72.25
15.15 5.40 72.24 70.26
15.64 5.50 73.03 69.74
16.13 5.60 72.88 68.35
16.64 5.70 72.74 67.02
17.18 5.80 73.12 66.22
17.70 5.90 71.12 63.31
18.26 6.00 70.75 61.93
18.80 6.10 70.35 60.57
19.39 6.20 68.69 58.19
20.00 6.30 66.56 55.49
20.65 6.40 64.98 53.32
21.31 6.50 63.54 51.34
21.99 6.60 65.01 51.74
--------- --------- --------- ---------
MAX: 21.99 6.60 73.12 78.03
MIN: 0.28 2.40 35.70 51.34