Datalogging On POR-003 & 005

Applicable Vehicles:

POR-003

• 911 (997.2) GT3 MT 2010-2012
• 911 (997.2) GT3 RS MT 2010-2011
• 911 (997.2) GT3 RS 4.0 2011

POR-005

• 911 (997.1) GT3 2007-2008
• 911 (997.1) GT3 RS 2007-2008

When And Why?:

When trying to diagnose driveability problems or assessing how well a new tune is working with the vehicle datalogging can be an invaluable tool.  By looking at what is going on with the vehicle under load or other conditions you're able to look at a picture in time and see if there were any issues or problems that would need to be addressed and sometimes where and why they occurred.  However a datalog is only as good as the monitors you record, much like how a map is only as useful as the information it has on it.

How Should I Drive When I Datalog?:

Because most of the problems people have are those that show up under heavy load, we want to have some good boost characteristics over the datalog.  Therefore we recommend you find an empty stretch of road so that it's not only safe for other people, but safe for you.  When trying to diagnose a problem it's easy to have too much to look at, so when trying to diagnose something we recommend keeping it short and simple.  In these instances a datalog of a single run from 2500rpm to redline in 3rd gear (if running a 5-speed) or 4th gear (if you have a 6-speed) ensures you don't have to spend time sifting through extraneous data to find what you need.  If your problem has to do more with idle characteristics perform the 2500rpm run, but sometimes taking a look at what your car does at idle can be of some help.  Lastly if you're a road racer you may want to datalog for long streches of time which, when paired with track telemetry, can help you figure out when and where things were going well, and when things were going bad, this can help diagnose more intricate problems like fuel slosh or oil starvation.  However as datalogs get bigger sifting through the lenghty spreadsheets can get difficult and time consuming at that time you may want to invest in a datalog viewer program which converts your spreadsheets into simple graphs so you can go through a bunch of data all at once.

Useful Monitors In Every Situation:

• Ambient Pressure
  • Barometric Pressure can help tuners compensate for driveability at altitude.

• Ambient Temperature
  • Ambient air temperature, may help to understand why a vehicle is performing some way due to the environmental conditions.

• Battery Voltage

• Engine RPM
  • Engine Speed in revolutions per minute.  Helps to get an idea of what the engine is doing at each moment.

• Engine Temperature
  • Engine coolant temp.

• Ignition Angle (Actual)
  • Final ignition timing value after all corrections.

• Injection Time
  • Injector open time in milliseconds.

• Intake-Air Temperature
  • Intake air temperature in the intake manifold.

• Knock Sums Cyl. 1
  • Knock Sums for cylinder number 1

• Knock Sums Cyl. 2
  • Knock Sums for cylinder number 2

• Knock Sums Cyl. 3
  • Knock Sums for cylinder number 3

• Knock Sums Cyl. 4
  • Knock Sums for cylinder number 4

• Knock Sums Cyl. 5
  • Knock Sums for cylinder number 5

• Knock Sums Cyl. 6
  • Knock Sums for cylinder number 6

• Lambda Bank 1
  • Air fuel reading from the wideband sensors Bank 1

• Lambda Bank 2
  • Air fuel reading from the wideband sensors Bank 2

• Load (Relative)
  • Relative Load.

• Load rlp
  • Load

• Long Term Fuel Trim Bank 1
  • Long term fuel trim for Bank 1.

• Long Term Fuel Trim Bank 2
  • Long term fuel trim for Bank 2.

• MAF 2
  • Mass air flow reading Bank 2

• MAF
  • Mass Airflow Reading Bank 1.

• Manifold Absolute Pressure
  • Manifold pressure.

• Short Term Fuel Trim Bank 1
  • Short term fuel trim for Bank 1.

• Short Term Fuel Trim Bank 2
  • Short term fuel trim for Bank 2.

• Throttle Angle
  • Desired Throttle Angle

List of Available Monitors:

• Actual Camshaft Angle Bank 1
  • Actual camshaft angle for Bank 1.

• Actual Camshaft Angle Bank 2
  • Actual camshaft angle for Bank 2.

• Actual Gear
  • Current transmission position.

• Catalytic Converter Temperature (Modeled)
  • Temperature of catalytic converter. This is a modeled temperature so not 100% accurate.

• Cold Start Enrichment Range 0

• Cold Start Enrichment Range 1

• Cold Start Enrichment Range 2

• Coordinated Torque for Cylinder Filling

• Current Starting Adaptation Factor
  • Amount of correction in percentage of correction when starting the car.

• Distance Since Power Failure
  • Distance amount since a power failure.

• Distance With Check Engine On
  • Distance with a check engine light on.

• Driving Cycle Counter
  • Driving cycle counter for readiness monitors.

• EGT Downstream of Cat (Modeled)
  • Exhaust gas temperature behind the catalytic converter. This is a modeled temperature so not 100% accurate.

• EGT Upstream of Cat (Modeled)
  • Exhaust gas temperature before the catalytic converter. This is a modeled temperature so not 100% accurate.

• Engine Compartment Temperature
  • Engine compartment temperature. Measured in the back of the car.

• Engine Oil Temperature
  • Temperature of engine oil.

• Engine Torque Loss
  • No Description

• Fuel Level
  • Fuel level.

• Maximum Torque
  • Maximum torque value

• Minimum Torque
  • Minimum Torque Value

• Nominal Throttle Plate Angle
  • Actual Throttle Angle

• Operating Time Since Power Failure
  • Amount of time since power failure.

• Radiator Fan Request Value
  • Radiator fan on and off request.

• Relative Secondary Air Mass Bank 1

• Relative Secondary Air Mass Bank 2

• Set Point Torque
  • Set point torque value.

• Target Camshaft Angle Bank 1
  • Target camshaft position for Bank 1.

• Target Camshaft Angle Bank 2
  • Target camshaft position for Bank 2.

• Target Firing Angle of Torque Intervention

• Target Idle Speed
  • Idle speed target.

• Total Mass Air Flow (MAF+Tank Vent)
  • This is a combination of MAF plus the tank vent recirc total airflow.

• Warm-up Cycle Counter
  • Cycle counter for the warm up cycle.

Definitions:

Link Dump:

How to Datalog:

https://cobbtuning.zendesk.com/hc/en-us/articles/200025134-How-to-Datalog

How to Change Datalog Monitors

How to Change Datalog Monitors

How to Change Gauges

How to Change/Reset Displayed Gauges