What are your MAP and MAF readings?
Thread Starter
Teching In
Joined: Apr 2002
Posts: 33
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From: Blue Springs, MO (KC suburb)
What are your MAP and MAF readings? I am trying to research why my ATI ProCharger isn't performing as well as I think it should. If you have an AutoTap or Ease trace, please post your MAF and MAP at the high RPM's. I am ESPECIALLY interested in your numbers if you don't own a ProCharger! I would also know what boost PSI you purchased.
At WOT (6100 RPM's) my boost pressure is 7 PSI. I have I have 38 to 40 Pounds per minute flow through my MAF. My Manifold Absolute Pressure is in the 28 to 30 inch range.
Any other information you might think would be useful regarding the amount of air getting into the engine, please post that too.
At WOT (6100 RPM's) my boost pressure is 7 PSI. I have I have 38 to 40 Pounds per minute flow through my MAF. My Manifold Absolute Pressure is in the 28 to 30 inch range.
Any other information you might think would be useful regarding the amount of air getting into the engine, please post that too.
Adkoonerstrator
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From: Deep in the seedy underworld of Koonerville
Re: What are your MAP and MAF readings? Here is an a-tap log from when I was running 4psi. I don't have any MAP readings.
Engine Speed,MAF Air Flow Rate,O2 Sensor - B1S1,O2 Sensor - B2S1,Ignition Timing Adv,Throttle Pos Ang,Knock Retard
3111,21.40,0.920,0.930,16.5,100.0,0.0
3294,23.37,0.940,0.945,17.0,100.0,0.0
3525,28.68,0.950,0.940,18.0,100.0,0.0
3737,29.11,0.945,0.940,18.5,100.0,0.0
3958,32.47,0.950,0.935,18.5,100.0,0.0
4188,35.53,0.945,0.940,18.5,100.0,0.0
4426,37.93,0.935,0.945,18.5,100.0,0.0
4661,40.61,0.940,0.935,18.5,100.0,0.0
4890,43.33,0.935,0.940,18.5,100.0,0.0
5121,46.23,0.925,0.935,18.5,100.0,0.0
5366,46.71,0.935,0.935,18.5,100.0,0.0
5586,45.82,0.930,0.915,18.5,100.0,0.0
6019,45.86,0.910,0.880,20.5,100.0,0.0
6237,46.09,0.890,0.885,20.5,100.0,0.0
5875,46.31,0.905,0.905,18.5,100.0,0.0
4421,34.70,0.935,0.935,18.5,100.0,0.0
4188,33.71,0.920,0.935,18.5,100.0,0.0
4264,35.17,0.925,0.910,18.5,100.0,0.0
4356,36.31,0.930,0.930,18.5,100.0,0.0
You should be seeing somewhere around 52-54lb/min. of airflow if your showing 7psi. I think the MAF ends cause the computer to see less airflow but, I've never messed with them so I don't know how much of an effect they have.
John
Engine Speed,MAF Air Flow Rate,O2 Sensor - B1S1,O2 Sensor - B2S1,Ignition Timing Adv,Throttle Pos Ang,Knock Retard
3111,21.40,0.920,0.930,16.5,100.0,0.0
3294,23.37,0.940,0.945,17.0,100.0,0.0
3525,28.68,0.950,0.940,18.0,100.0,0.0
3737,29.11,0.945,0.940,18.5,100.0,0.0
3958,32.47,0.950,0.935,18.5,100.0,0.0
4188,35.53,0.945,0.940,18.5,100.0,0.0
4426,37.93,0.935,0.945,18.5,100.0,0.0
4661,40.61,0.940,0.935,18.5,100.0,0.0
4890,43.33,0.935,0.940,18.5,100.0,0.0
5121,46.23,0.925,0.935,18.5,100.0,0.0
5366,46.71,0.935,0.935,18.5,100.0,0.0
5586,45.82,0.930,0.915,18.5,100.0,0.0
6019,45.86,0.910,0.880,20.5,100.0,0.0
6237,46.09,0.890,0.885,20.5,100.0,0.0
5875,46.31,0.905,0.905,18.5,100.0,0.0
4421,34.70,0.935,0.935,18.5,100.0,0.0
4188,33.71,0.920,0.935,18.5,100.0,0.0
4264,35.17,0.925,0.910,18.5,100.0,0.0
4356,36.31,0.930,0.930,18.5,100.0,0.0
You should be seeing somewhere around 52-54lb/min. of airflow if your showing 7psi. I think the MAF ends cause the computer to see less airflow but, I've never messed with them so I don't know how much of an effect they have.
John
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Joined: Feb 2002
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From: the moon
Re: What are your MAP and MAF readings? This was my last log before I tore down the motor for a forged piston rebuild-
Hit 10psi by 6000rpm, Vortech, No intercooler, water/alcohol injection and 100% factory stock exhaust to the catback at the time(was installed for emissions testing).
Stock camshaft with home ported heads.
1st gear punch through 2nd gear in this log.
That is about 100mph. Has IAT's also.
Ignition Timing Adv, MAF Air Flow Rate, O2 Sensor - B1S1,O2 Sensor - B2S1, Knock Retard,Inj Pulse Width B1,Inj Pulse Width B2,Delivered Eng Torque,Intake Air Temp, Engine Speed
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">code:</font><hr /><pre style="font-size:x-small; font-family: monospace;">25.5 16.28 0.775 0.825 0 12.02 12.34 426 99 4288
21.5 49.56 0.85 0.905 0 16.85 16.95 534 99 5794
24.5 64.95 0.835 0.87 0 0.34 15.59 452 104 4929
38.5 23.99 0.76 0.87 0 16.16 16.31 536 109 4745
31 11.21 0.845 0.87 0 13.55 13.99 460 111 4140
21.5 43.47 0.88 0.91 0 15.64 15.67 536 111 4667
21 44.73 0.87 0.91 0 15.84 15.99 544 113 4848
21 49.16 0.86 0.905 0 16.19 16.16 544 117 4996
21 48.79 0.855 0.9 0 16.53 16.63 542 118 5162
21.5 51.15 0.865 0.905 0 16.97 16.8 536 118 5303
22 54.78 0.86 0.895 0 16.88 16.88 534 115 5428
22.5 57.16 0.855 0.895 0 16.72 16.92 530 111 5652
23.5 58.02 0.84 0.88 0 16.85 16.75 524 111 5882
24 60.09 0.84 0.875 0 16.97 16.88 520 108 6076</pre><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Steve
<small>[ June 27, 2002, 04:49 PM: Message edited by: SJH ]</small>
Hit 10psi by 6000rpm, Vortech, No intercooler, water/alcohol injection and 100% factory stock exhaust to the catback at the time(was installed for emissions testing).
Stock camshaft with home ported heads.
1st gear punch through 2nd gear in this log.
That is about 100mph. Has IAT's also.
Ignition Timing Adv, MAF Air Flow Rate, O2 Sensor - B1S1,O2 Sensor - B2S1, Knock Retard,Inj Pulse Width B1,Inj Pulse Width B2,Delivered Eng Torque,Intake Air Temp, Engine Speed
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">code:</font><hr /><pre style="font-size:x-small; font-family: monospace;">25.5 16.28 0.775 0.825 0 12.02 12.34 426 99 4288
21.5 49.56 0.85 0.905 0 16.85 16.95 534 99 5794
24.5 64.95 0.835 0.87 0 0.34 15.59 452 104 4929
38.5 23.99 0.76 0.87 0 16.16 16.31 536 109 4745
31 11.21 0.845 0.87 0 13.55 13.99 460 111 4140
21.5 43.47 0.88 0.91 0 15.64 15.67 536 111 4667
21 44.73 0.87 0.91 0 15.84 15.99 544 113 4848
21 49.16 0.86 0.905 0 16.19 16.16 544 117 4996
21 48.79 0.855 0.9 0 16.53 16.63 542 118 5162
21.5 51.15 0.865 0.905 0 16.97 16.8 536 118 5303
22 54.78 0.86 0.895 0 16.88 16.88 534 115 5428
22.5 57.16 0.855 0.895 0 16.72 16.92 530 111 5652
23.5 58.02 0.84 0.88 0 16.85 16.75 524 111 5882
24 60.09 0.84 0.875 0 16.97 16.88 520 108 6076</pre><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Steve
<small>[ June 27, 2002, 04:49 PM: Message edited by: SJH ]</small>
