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Old 06-01-2006, 09:02 PM   #1
Sko
Scooby Specialist
 
Member#: 90396
Join Date: Jul 2005
Chapter/Region: NWIC
Location: Portland, OR
Vehicle:
2005 Legacy 2.5i
Brilliant Silver Metallic

Default Hydra Air Temp Trim Question...

Any of you guys use the air temp trims sugjested in the MR2 Hydra "tuning guide"?

Right now I've got (from -20C to 130C):

4.1 : 3.6 : 3.1 : 2.5 : 1.9 : 1.3 : .6 : 0 : 0 : 0 : .1 : -.4 : -.9 : -1.3 : -2 : -2.5

And the values he sugjests are:

12.7 : 12 : 10.6 : 8.4 : 5.6 : 2.5 : -.6 : -3.2 : -5.7 : -8.1 : -10 : -11.1 : -11.6 : -12 : -12.3 : -12.5

These values seem very differant from one another, so I thought I'd get some input from some other folks before I start using them... or mabe I will say screw it and try them anyways, but I basically want what will give me the most consistant AFRs.

Nick
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Old 06-01-2006, 11:53 PM   #2
Sko
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Join Date: Jul 2005
Chapter/Region: NWIC
Location: Portland, OR
Vehicle:
2005 Legacy 2.5i
Brilliant Silver Metallic

Default

Another question I am asking only to have to come to my own conclusions.

After testing those settings it really leaned out my AFRs at idle, and didn't attempt driving around with those settings, if anyone did get them to work however it would be nice to know how well they do work.

Of course my car came stock with a MAP sensor and not a MAF so the intake air temps might be off by a little bit.

Nick
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Old 06-02-2006, 10:15 AM   #3
Element Tuning
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Member#: 54918
Join Date: Feb 2004
Chapter/Region: MAIC
Location: Gaithersburg, MD
Vehicle:
673 WHP Element
Tuning Pro Comp Engine

Default

Sko,

You cannot use the IAT settings for the MR2 as they are based on the GM IAT and with a corresponding base map.

This is not an area you should concentrate your efforts on. First tune your fuel map and make note of your IAT temps while tuning. If you think for whatever the IAT correction table is off as IAT temp changes under driving conditions then you can modify the table to ensure you are hitting the same AFRs.

Thanks,
Phil
www.elementtuning.com
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Old 06-02-2006, 08:26 PM   #4
Sko
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Member#: 90396
Join Date: Jul 2005
Chapter/Region: NWIC
Location: Portland, OR
Vehicle:
2005 Legacy 2.5i
Brilliant Silver Metallic

Default

Ah, makes perfect sense.

Thanks Phil!

Nick
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