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Old 07-07-2012, 03:04 PM   #1
Jdub.csu
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Default Cobb stage 2 log

Here is the log for my Stage 2 2012 WRX.

Is there anything really troubling here?

https://docs.google.com/spreadsheet/...nBxajdSNWxEUFE
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Old 07-08-2012, 06:41 AM   #2
Jdub.csu
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Anyone?
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Old 07-08-2012, 10:22 AM   #3
Cobb Tuning
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Originally Posted by Jdub.csu View Post
Here is the log for my Stage 2 2012 WRX.

Is there anything really troubling here?

https://docs.google.com/spreadsheet/...nBxajdSNWxEUFE
Hi there. A log of general part-throttle driving doesn't tell you a lot. You want to put the car under heavy load to see how it reacts. A good run for this purpose would be a 3rd gear wide open throttle (WOT) run from around 2000 RPM on up (if you can do so safely). Check out our data logging video below.

Bill
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Old 07-09-2012, 02:15 PM   #4
werks04
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I just did my 2nd data log on a stage 2 map. Car is an 04 WRX. Im a little confused because the first run I hit 15.5 lbs of boost and had higher MAF obviously... And Im still trying to figure out why under WOT it has a rich and steady AFR of 11.25...

Heres my DL
https://docs.google.com/open?id=0Bzg...XZyT19vcXRMY2s

Download it and open in Excel the Google docs has it completely cut off
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Old 07-09-2012, 02:18 PM   #5
werks04
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Also, Bill what is the correct way to estimate HP and TQ from the data? I used MAF/.83 to get HP... I dont even know where that .83 comes from or if its some constant based on Fuel type and AFR
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Old 07-09-2012, 02:43 PM   #6
Cobb Tuning
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Originally Posted by werks04 View Post
I just did my 2nd data log on a stage 2 map. Car is an 04 WRX. Im a little confused because the first run I hit 15.5 lbs of boost and had higher MAF obviously... And Im still trying to figure out why under WOT it has a rich and steady AFR of 11.25...

Heres my DL
https://docs.google.com/open?id=0Bzg...XZyT19vcXRMY2s

Download it and open in Excel the Google docs has it completely cut off
Can you put up the original .csv file on google docs? I'm not able to download the file directly with my account.

I wouldn't bother in trying to use MAF to estimate HP. At best, you may get a ballpark idea of the potential HP, not what you are actually achieving. You are better off with an actual dyno or even using the road dyno function.

Bill
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Old 07-09-2012, 02:45 PM   #7
werks04
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Old 07-09-2012, 02:46 PM   #8
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I think I just need the High Wastegate Stage 2 Map
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Old 07-09-2012, 03:07 PM   #9
Cobb Tuning
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Says "no preview available" - can you start a new thread at cobbforums.com and attach the actual .csv file there (select "manage attachments")?

Bill
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Old 07-09-2012, 03:18 PM   #10
werks04
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Old 07-09-2012, 03:54 PM   #11
Cobb Tuning
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Hi Randy. I took a look at the logs. Everything looks fine - the one concern I would have is that you are using an intake that is not compatible with our OTS maps. Your fuel trims (A/F Learning 1) look fine, but it may have not have been long enough since the last map reflash/reset cleared them to be populated accurately. I would consider putting the stock intake (or Cobb SF intake on), getting your intake tuned for via a custom tune, or at least verify fueling via a wideband o2 sensor. The stock front o2 sensor is not accurate under any appreciable boost (and is limited to 11.2:1 by ECU on rich side). Once you get that straightened out, you could give the HWG map a try (with additional logging).

Bill
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