Comparison of modification before/after runs:
For the next two test runs, I did what is commonly called a "MAF screen delete". The Mass airflow sensor on my test vehicle has a honeycomb screen leading into the sensor. This has the theoretical effect of smoothening the airflow as it enters the MAF, and improving the accuracy of the unit. It also has the effect of lowering the airflow through the unit. Here are the test runs 19 and 20:
"After" Run 19
Tilt .001
Trigger 0.29G
No MAF Screen
Start Speed 0.0mph
mph s g ft hp
10.0 0.90 0.51 6 57
20.0 1.82 0.44 26 100
30.0 2.84 0.45 64 154
40.0 3.87 0.41 117 191
50.0 5.17 0.33 203 195
60.0 6.75 0.28 330 207
Pk Power: 49.0mph 5.02s 192ft 223hp
Peak G: 16.2mph 1.45s 16ft 0.52g
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"After" Run 20
Tilt .001
Trigger 0.29G
No MAF Screen
Start Speed 0.0mph
mph s g ft hp
10.0 0.90 0.51 6 57
20.0 1.82 0.44 26 100
30.0 2.83 0.45 63 156
40.0 3.86 0.41 117 191
50.0 5.22 0.30 207 182
60.0 6.83 0.28 337 204
Pk Power: 62.4mph 7.23s 373ft 214hp
Peak G: 15.9mph 1.42s 16ft 0.52gThe three previous runs 15-17, each had a HP at 40 mph of 184, 188, and 186 hp, average 186 hp. All were done on the same day as runs 19 & 20. Both of the "after" test runs had HP at 40 mph of 191 hp. Therefore one might conclude that the MAF screen delete is worth 5 HP on this vehicle, and about 0.10 seconds reduction in 0-60 time based on an average "before" of 6.90 seconds (discarding run 17), and an average "after" of 6.79 seconds.
Run 15
Tilt .001
Trigger 0.25
With MAF Screen
Start Speed 0.0mph
mph s g ft hp
10.0 0.91 0.52 6 58
20.0 1.83 0.44 26 100
30.0 2.85 0.45 64 154
40.0 3.90 0.40 118 186
50.0 5.28 0.33 209 195
60.0 6.90 0.27 340 202
Pk Power: 61.8mph 7.21s 368ft 208hp
Peak G: 15.6mph 1.40s 15ft 0.52g
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Run 16
Tilt .001
Trigger 0.28
With MAF Screen
Start Speed 0.0mph
mph s g ft hp
10.0 0.91 0.52 6 59
20.0 1.83 0.44 26 99
30.0 2.85 0.45 64 154
40.0 3.89 0.41 117 188
50.0 5.28 0.31 210 186
60.0 6.91 0.27 341 202
Pk Power: 64.7mph 7.71s 415ft 212hp
Peak G: 15.9mph 1.42s 16ft 0.52g
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Run 17
Tilt .001
Trigger 0.29G
With MAF Screen
Start Speed 0.0mph
mph s g ft hp
10.0 0.91 0.53 6 60
20.0 1.87 0.42 27 96
30.0 2.90 0.44 65 153
40.0 3.97 0.39 120 184
50.0 5.39 0.29 214 176
60.0 7.00 0.27 344 202
Pk Power: 61.5mph 7.24s 366ft 210hp
Peak G: 11.2mph 1.01s 7ft 0.53gAs a side note, I am shocked to find that the variance in runs made on the same basis such as Runs 19 & 20 occurs between 40 and 60 mph! I had always previously believed that with an Automatic car, the variance between runs was in the launch, not in the run out. Having detailed data makes a big difference in being able to understand and diagnose this type of thing.
Introduction
Description & Details
How well does it work?
Have you compared side by side results from a G-Tech Pro?
How do Quarter Mile Results Compare between the G-Tech and AP-22?
Can you use the AP-22 to tell if a Mod Works?
What could be improved on the AP-22?
Why not just get a G-Tech Pro?
Where can I get one?