View Full Version : Data Logging: is this good or bad
C_randyjones
08-05-2007, 01:28 PM
I posted these results in another thread about having slow trap speeds but thought that someone might be interested in the data logs so I started a new thread. Sorry for the redundancy, but can anyone tell me if theis looks OK or not?
Data Logging:5EAT full stage 2 with TMIC (I have dropin filter), WOT from first gear through 3rd in 84 degrees and 95% humidity(just finished raining):
Boost peaks at about 17.5 @4500 rpm and tapers to 16 @5000, 12 at redline
Mass air flow: 190 - 210
Knock correction ranging 1 to 7, higher numbers in first gear only, peaks at 4 in second and third
Primary wastegate duty cycle: 90.20 @ WOT throughout
Ignition timing: 14 at 4500 and 20 at redline in first gear, 14 to 24 in second and third
boostsr20
08-05-2007, 02:22 PM
Your not moving very much air for your mods. My 5EAT with the same mods minus a TMIC was moving 235 G/S. I know there will be some variance from car to car and elevation, but that still seems really low. Check your air filter and make sure its clean.
Do another log and only run third gear. If your comfortable with it and can find an empty road you want to start in 3rd gear around 2000RPM's and run it up to redline, that will give you more accurate readings. Post the plot also.
Infamous1
08-05-2007, 02:22 PM
It is best to do a pull in third only to get a good reading. Basically a pull manually in third from the lowest possible rpm and go WOT to about 7,000 rpms. Then upload the entire log on to this thread.
C_randyjones
08-05-2007, 02:31 PM
Thanks for the tip, I will do that. Also how do you get the plots to save to a downloadable format. I can view them on my laptop but cannot access them or save them to file that I can transfer to my PC to send you guys. What is the trick? i am using the tari software.
C_randyjones
08-05-2007, 02:33 PM
I have a new AVO filter about 2 months old, It looks very clean. Could it be in backwards? Would that matter? Looks like it will only fit one way.
Could the low flow represent a leak somewhere?
C_randyjones
08-05-2007, 02:41 PM
Is the Mass air flow a parameter that can be adjusted in the mapping of the ECU or is it mostly intrinsic in the setup of the car?
The car has a sensor that gives a MAF reading in volts, and there's a table in the ECU that converts the voltage to grams-per-second. Since your MAF sensor is still in the stock location, you can be certain that your MAF readings are accurate, so there is no need to edit that table.
The MAF reading tells how much air the engine is ingesting. Airflow is one of the limiting factors in how much power an engine can make, so larger MAF readings are better.
I haven't used the TARI software, but I assume it saves data logs in CSV format. Unfortunately this forum doesn't allow posting CSV files, so I suggest taking your data log questions to http://www.enginuity.org/ instead. There is a good community of Subaru tuners over there, in fact a lot of the same people post on both forums.
chenc544
08-06-2007, 08:58 AM
I haven't used the TARI software, but I assume it saves data logs in CSV format. Unfortunately this forum doesn't allow posting CSV files, so I suggest taking your data log questions to http://www.enginuity.org/ instead.
What you can do is rename the .csv to .pdf and post it. The forum will let you post pdf files.