Speed Density IAT options
#1
Speed Density IAT options
I'm starting this thread to try and compile as much detailed info about all of the different options for each way we can use IAT data with the speed density patches.
I would like to list the following for each:
-options available depending on ROM used
-which IAT option is used (0x0E or 0x03)
-Scaling changes (as well as ECUflash table scaling changes)
-location of scaling changes depending on which option you use
-where the sensor input is connected on the vehicle
-evoscan Request ID and formula for each option
So I know we have the option of using the fuel temp sensor, a GM IAT sensor connected to the fuel temp sensor input on the ECU, or a GM IAT sensor connected to the factory air temp sensor wires on the MAF plug.
If everyone can contribute any of the detailed info for each option so it's all in one place, I will update this first post as the info is compiled.
If there is already a single post with all of the DETAILED info on this, just send me a link and I will delete this thread. Thanks guys.
-Jamie
I would like to list the following for each:
-options available depending on ROM used
-which IAT option is used (0x0E or 0x03)
-Scaling changes (as well as ECUflash table scaling changes)
-location of scaling changes depending on which option you use
-where the sensor input is connected on the vehicle
-evoscan Request ID and formula for each option
So I know we have the option of using the fuel temp sensor, a GM IAT sensor connected to the fuel temp sensor input on the ECU, or a GM IAT sensor connected to the factory air temp sensor wires on the MAF plug.
If everyone can contribute any of the detailed info for each option so it's all in one place, I will update this first post as the info is compiled.
If there is already a single post with all of the DETAILED info on this, just send me a link and I will delete this thread. Thanks guys.
-Jamie
Last edited by Jack_of_Trades; Jan 26, 2012 at 08:37 AM.
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#8
I believe this is all the correct info for:
GM IAT sensor connected to MAF harness (temps are in Fahrenheit)
via Spoolinup SD IAT Plug n' Play Harness or hardwiring the sensor to the harness by connecting it to the RED/BLUE wire and the BLACK wire.
I want to make sure this is correct for everyone else before I finalize the info for this option.
GM IAT sensor connected to MAF harness (temps are in Fahrenheit)
via Spoolinup SD IAT Plug n' Play Harness or hardwiring the sensor to the harness by connecting it to the RED/BLUE wire and the BLACK wire.
- SD IAT option set to 0x03
- SD MAT Scaling for IAT Scaling located in the Speed Density Programming section in ECUFlash needs to be sure the temp scaling for the table is set properly before editing any values. The correct scaling needs to be set to TempScale. The window bleow can be found by RIGHT-CLICKING the table and selecting "EDIT MAP...".
- Once the table scaling is confirmed to be set correctly, you need to confirm that the appropriate temperature scaling for the GM IAT in the right column of the table is set to the proper values. The correct values can be found HERE. If they don't already match the values currently in the table, copy and paste the values from the link provided.
- In evoscan, use MUT11 to log the actual air temp readings that will be used by the ECU in all of the maps when the car is running. MUT3A is the unscaled raw air temperature directly from the sensor itself. Here is the evoscan data if you do not have them already:
Code:
<DataListItem DataLog="Y" Color="" Display="Air Temperature" LogReference="AirTemp" RequestID="3a" Eval="1.8*x+32" Unit="deg F" MetricEval="x" MetricUnit="deg C" ResponseBytes="1" GaugeMin="0" GaugeMax="190" ChartMin="0" ChartMax="190" ScalingFactor="1" Notes=" " Priority="1" Visible="False" /> <DataListItem DataLog="N" Color="" Display="MAF Air Temp Scaled" LogReference="MAFAirTempScaled" RequestID="11" Eval="1.8*x-40" Unit="deg F" MetricEval="x-40" MetricUnit="deg C" ResponseBytes="1" GaugeMin="-40" GaugeMax="260" ChartMin="-40" ChartMax="260" ScalingFactor="1" Notes="" Priority="1" Visible="False" />
Last edited by Jack_of_Trades; Feb 13, 2012 at 12:11 PM.
#9
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Subscribed! Btw already got my car setup for the Spoolin up harness w/ gm iat on my car. how can i take a screen shot and ill post my tables up for everyone to see. Hope your doing good bro. and very informative thread. BTW does MUT 11 still work on the 3DSD roms or do they change from the 2d to 2d for logging.
#10
I'm not actually sure if the formula for the MUT is the appropriate on to use since the "-40" is a Celsius conversion while "+32" is the Fahrenheit conversion. Someone will have to chime in and confirm that is the correct formula and RequestID to be using.