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Old 08-13-2013, 11:21 AM   #1
TurboRex
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Member#: 8635
Join Date: Jul 2001
Location: Texas
Vehicle:
04 STI, 07 FXT

Default Tuning IAT Timing Offset

I noticed the stock map has timing retard with a higher iat. This seems appropriate but the offset seems exaggerated more than it should. Has anyone ever experimented with these to get a more accurate adjustment table? The stock map adjusts up to 8 degrees at high temps while I saw a stage 2 only take away 1 degree at high temps. Again, the stock ecu would increase timing at colder temps.

For instance, heatsoak will dramatically raise the iat but the true temp at the tb is likely not much different. Anyone willing to share any experience in tuning this timing compensation parameter?

Thanks.
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Old 08-13-2013, 01:18 PM   #2
wgr73
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Member#: 232458
Join Date: Dec 2009
Chapter/Region: SWIC
Location: Las Cruces, El Paso
Vehicle:
2008 STi (OBP)
CAMTuning ftw

Default

What I do (on pump gas) is starting at 104* I'll pull 1*, 122 I'll pull 2*, and 140 pull 4*.

On E85 I won't pull any timing until 140*, where I'll pull 2*.

At the track I'll be more aggressive with pump IAT compensations (i.e start pulling timing at 122*) but I'll log. If I'm on E85 at the track I'll just zero out all IAT compensations that way I know I won't pull timing due to high intake temps


I am on SD (maf relocation) and a fmic though so my IAT is more accurate.
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Old 08-14-2013, 12:46 AM   #3
TurboRex
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04 STI, 07 FXT

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Since most of my tuning is at an iat of 115 degrees, i think I will not take away timing until 50 degrees C(1 deg),then take away 2 at 60, 4 at 70 and so on. I dont feel comfortable adding timing at lower temps until the weather cools off and i can log. Again, I still cant see adding much unless i knew someone has actually had experience with this.
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Old 08-14-2013, 10:15 AM   #4
wgr73
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Member#: 232458
Join Date: Dec 2009
Chapter/Region: SWIC
Location: Las Cruces, El Paso
Vehicle:
2008 STi (OBP)
CAMTuning ftw

Default

Quote:
Originally Posted by TurboRex View Post
Since most of my tuning is at an iat of 115 degrees, i think I will not take away timing until 50 degrees C(1 deg),then take away 2 at 60, 4 at 70 and so on. I dont feel comfortable adding timing at lower temps until the weather cools off and i can log. Again, I still cant see adding much unless i knew someone has actually had experience with this.
I don't ever want the ecu to add timing. I zero out all of the positive timing values in this table.
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