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Old 04-15-2015, 02:21 AM   #1
ninjastar310
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Default Acesstunner 2015 sti with AEM intake

I know this question might have been asked but here it goes. I was reading and talking to the staff at cobb about the 2015 sti with AEM intake and not having a map. They told me all I would have to do it calibrate the MAF calibration data from 2014 and would get me close and with in safe measures.

Here are my questions

1. Has anyone done this with good success?

2. Why is it that with the stock the MAF calibration stage 1 starts at .92 while stage 1+sf start at 1.10 and the 2014 sti with AEM be at .88?

3. For those who have done this, what changes have you guys made or adjusted?

4. If cobb has released maps with AEM in the past, will they release one in the near future?
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Old 04-15-2015, 11:37 AM   #2
snoopy_sti
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PM me if you want the MAF DATA from the 2014 , will send it to you in Excel format and then you can copy and paste it into ATR.

In the simplest answer it just adjust what the ECU see's so that your car will not lean out. All fueling is based on what the MAF sends to the ECU.
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Old 04-16-2015, 02:19 AM   #3
ninjastar310
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So MAF would be the only thing modified right, what about A/F learning? I was told by cobb that it has to be between -8 and 8 but the settings on ATR is 5.60/12.00/50.00?

As far as MAF calibration goes, what is the major difference between stock stage 1 tune and stage 1+sf??

Thanks for the help but someone from cobb was able to send it to me.
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Old 04-16-2015, 07:32 AM   #4
quazimoto
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Quote:
Originally Posted by ninjastar310 View Post
So MAF would be the only thing modified right, what about A/F learning? I was told by cobb that it has to be between -8 and 8 but the settings on ATR is 5.60/12.00/50.00?

As far as MAF calibration goes, what is the major difference between stock stage 1 tune and stage 1+sf??

Thanks for the help but someone from cobb was able to send it to me.
It seems you might not be understanding the tables correctly. The setting you posted for ATR are for the g/s range for the corrections (A/B/C/D). The actual "acceptable" fuel correction should be -8/+8 for each range. The changes to the MAF scale/calibration (g/s) make it so the fuel correction fall within the -8/+8 range across the board. The most common reasons for having to change the MAF scaler/calibration is either the MAF housing inner diameter is bigger or smaller than stock or turbulence.
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Old 04-17-2015, 11:08 PM   #5
ninjastar310
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Quote:
Originally Posted by quazimoto View Post
It seems you might not be understanding the tables correctly. The setting you posted for ATR are for the g/s range for the corrections (A/B/C/D). The actual "acceptable" fuel correction should be -8/+8 for each range. The changes to the MAF scale/calibration (g/s) make it so the fuel correction fall within the -8/+8 range across the board. The most common reasons for having to change the MAF scaler/calibration is either the MAF housing inner diameter is bigger or smaller than stock or turbulence.
Ahhhh so basically based on data logs that I recorded i can adjust the MAF calibration to be within those numbers.
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Old 04-17-2015, 11:47 PM   #6
snoopy_sti
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Its based on more... Hope this helps

http://www.romraider.com/forum/viewt...hp?f=33&t=5321
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Old 04-18-2015, 07:45 AM   #7
quazimoto
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Originally Posted by ninjastar310 View Post
Ahhhh so basically based on data logs that I recorded i can adjust the MAF calibration to be within those numbers.
Not quite. You need a wideband and openloop fueling doesn't use O2 sensor feedback. There are several threads on this forum and Romraider about scaling the MAF. It is not for a novice.
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