Boost and MAF #'s
02-20-2004, 07:27 AM
#1
Boost and MAF #'s
Do these numbers look okay. I was told the Air Flow numbers are low. These are 3rd gear pulls on a 2000 S4 with GIAC X Chip.
Engine Engine load Spec'd Actual speed Boost Boost
/min % mbar mbar
2080 76.7 1030 1320
2320 110.5 2030 1460
2800 156.4 2010 2230
3320 139.8 2030 1930
3720 143.6 2120 2070
4280 139.1 2160 2140
4720 133.8 2150 2110
5200 127.8 2120 2090
5560 120.3 2050 2040
5920 112.8 1970 2010
Mass Air Flow
Engine MAF Throttle Ign timing
speed
/min g/s % °BTDC
2160 61.97 30.2 20.3
2520 106.11 78.8 15.8
3080 122.5 38.8 9.8
3520 151.47 93.3 12
3960 162.94 100 10.5
4520 177.78 100 10.5
4960 189.33 100 12
5400 195.39 100 12.8
5760 195.47 100 12.8
6080 194.53 100 12.8
Just wanted to make sure everything is all right
Engine Engine load Spec'd Actual speed Boost Boost
/min % mbar mbar
2080 76.7 1030 1320
2320 110.5 2030 1460
2800 156.4 2010 2230
3320 139.8 2030 1930
3720 143.6 2120 2070
4280 139.1 2160 2140
4720 133.8 2150 2110
5200 127.8 2120 2090
5560 120.3 2050 2040
5920 112.8 1970 2010
Mass Air Flow
Engine MAF Throttle Ign timing
speed
/min g/s % °BTDC
2160 61.97 30.2 20.3
2520 106.11 78.8 15.8
3080 122.5 38.8 9.8
3520 151.47 93.3 12
3960 162.94 100 10.5
4520 177.78 100 10.5
4960 189.33 100 12
5400 195.39 100 12.8
5760 195.47 100 12.8
6080 194.53 100 12.8
Just wanted to make sure everything is all right
02-20-2004, 07:53 AM
#4
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Temperature? Boost is okay for cold temps, but airflow is low...
I would assume it is the MAF. Try unplugging the sensor and see if the car is faster. If you feel a difference, your MAF is dead/dying.
02-20-2004, 07:54 AM
#5
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For example, in 30 degree weather (this past week) I am running 1.1 bar and pulling ~275 g/s...
I probably have a few more mods than you, but your airflow #'s should still be at least 250 g/s like Dave said.
