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Old Oct 27, 2012 | 06:53 AM
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Adding second map sensor

Can I use the rest of the maf harness to configure and log a second map sensor? I'm on sd using gm iat.

I want to log pre throttle body pressure.
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Old Oct 27, 2012 | 08:05 AM
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According to workshop manuals both baro and map inputs seems to be same type inputs so maybe you could use baro analog input directly? As you know there is all necessary signals in maf connector for map sensor: +5V, ground and signal wire (baro) connected to analog input pin. So we just need to point one unused adc read routine to read baro input.

This is for 88586714 (logging from MUT97):

<table name="Read baro ADC (0x08 -> 0x04)" category="Speed Density Programming" address="bf99" type="1D" level="1" scaling="Hex8"/>
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Old Oct 27, 2012 | 01:21 PM
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Do you have same for 88570008 ??? please and thanks
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Old Oct 27, 2012 | 01:48 PM
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Thank you donner, I will be trying to accomplish adding a second map sensor to compliment the sas theory that I have going.
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Old Oct 27, 2012 | 09:30 PM
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Is there any difference in logging the compressor cover vs just pre throttle body?
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Old Oct 27, 2012 | 11:50 PM
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Originally Posted by todd6027
Do you have same for 88570008 ??? please and thanks
Remember this only works with sd roms

For 88570008 (logging from MUT97):

<table name="Read baro ADC (0x08 -> 0x04)" category="Speed Density Programming" address="b301" type="1D" level="1" scaling="Hex8"/>
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Old Oct 28, 2012 | 12:58 PM
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perfect , thats understood , many thanks
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Old Oct 29, 2012 | 07:15 AM
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Todd do you plan to add a map sensor or something else?
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Old Oct 29, 2012 | 11:16 AM
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for the min i want to try use it to log charge temp
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Old Oct 30, 2012 | 12:34 PM
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If you're not running a gang of boost, these sensors look pretty sweet; and cheap!

Bosch 3 Bar TMap Map Sensor with IAT: $30
http://www.bmotorsports.com/shop/pro...oducts_id/1721
4-way sealed Plug Bosch BSK Connector Kit for Bosch MAP Sensor: $20
http://www.bmotorsports.com/shop/pro...oducts_id/1625

They seem like a real good option for retrofitting for SD in general. The sensor has a bunch of resolution on the bottom of the MAP range for good idle, etc.
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Old Oct 30, 2012 | 12:58 PM
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I have one wrx 2.5l sensor 2.5 bar looks pretty close that

Last edited by 211Ratsbud; Oct 30, 2012 at 01:00 PM.
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Old Nov 22, 2012 | 05:58 PM
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Ok, so I can just splice the output wire from the MAP sensor in to pin 2 on the maf plug im good right?

sensor gets ground and +5v for power which should be ok to split from the IAT sensor correct?
Attached Thumbnails Adding second map sensor-mafs.png   Adding second map sensor-maf.gif  

Last edited by 211Ratsbud; Nov 22, 2012 at 06:01 PM.
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Old Nov 22, 2012 | 07:42 PM
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I would like to start logging dual boost to get some turbo back pressure data. This would be helpful.
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Old Nov 22, 2012 | 09:47 PM
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Im torn in mounting location. No matter what aluminum must be modified. Are you thinking pre and post IC locations?
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