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08-29-2009, 06:44 PM | #1 |
Scooby Specialist
Member#: 68448
Join Date: Aug 2004
Chapter/Region:
NWIC
Location: Ellensburg, WA
Vehicle:2008 WRX STi Cobb tunned by Surgeline |
learning view questions on learned afr's
hey guys and gals!
I have added meth/water to my car and I trying to understand the learning view program learned afr's. From what I can see I am not only taking some fuel but adding a lot? Please give me some insight on these numbers. I see the potential in this program, help me use it! Here is the shot This is on a 2008 STi XPT STG2 300cc nozzle progressive spray 9-19 PSI (19 target boost) Thanks!
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Last edited by my02turboWRX; 08-29-2009 at 06:52 PM. |
08-30-2009, 01:23 AM | #2 |
Scooby Specialist
Member#: 26568
Join Date: Oct 2002
Chapter/Region:
NESIC
Location: Brighton, Mass
Vehicle:2003 Yellow Bugeye Version 8-Vf37 |
your concern should be the 40+ g/s section. Your running lean so your car is adding 12% fuel. When you go open loop, your ecu will still continue to add 12% fuel so you might not quite be hitting your a/f ratio targets under load and boost.
but richer is safer, while leaner is meaner |
08-30-2009, 12:12 PM | #3 |
Scooby Specialist
Member#: 68448
Join Date: Aug 2004
Chapter/Region:
NWIC
Location: Ellensburg, WA
Vehicle:2008 WRX STi Cobb tunned by Surgeline |
Its a % factor.. that is the info I am after. So I should be able to look at my map tables to understand why this number is so high.
Thank you for the reply |
08-30-2009, 03:54 PM | #4 |
Scooby Guru
Member#: 70395
Join Date: Sep 2004
Chapter/Region:
MAIC
Location: Da-boonies,Va
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You need to list all your mods. A wideband O2 sensor is the only thing that is going to really tell you whats going on in the "D" range.
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08-30-2009, 07:20 PM | #5 |
Scooby Specialist
Member#: 68448
Join Date: Aug 2004
Chapter/Region:
NWIC
Location: Ellensburg, WA
Vehicle:2008 WRX STi Cobb tunned by Surgeline |
well the only mods I have is a 3" catless DP back to stock muffler , KN filter, water/meth injection
other than those few things its all in the laptop dyno AFR shows 11.2 clean up top dropping to about 10.5 to redline at 22 psi I have never delt with water/methanol so thta is why I think I am getting confused at the numbers I see. (meth was recommended by the dyno shop... meth and lower boost to 19) I have read that methanol and water will throw AFR numbers way off. That is why I am looking for input on these numbers. |
08-30-2009, 08:58 PM | #6 |
Scooby Guru
Member#: 140444
Join Date: Feb 2007
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NWIC
Location: Near Seattle, WA
Vehicle:05 Stage Free LGT ATP 3076, 6MT, AVO FMIC |
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08-30-2009, 11:00 PM | #7 |
Scooby Specialist
Member#: 68448
Join Date: Aug 2004
Chapter/Region:
NWIC
Location: Ellensburg, WA
Vehicle:2008 WRX STi Cobb tunned by Surgeline |
on the nose.. thanks!
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08-31-2009, 04:51 AM | #8 |
Sammo Hung
Moderator Member#: 10613
Join Date: Sep 2001
Chapter/Region:
South East
Location: N Fla / S Ga
Vehicle:2002 USDM WRX WRB |
which water / meth kit do you have?
i would follow the manufacturer's recommendation for afrs. yes water / meth will show a richening of afr. so if you're wideband indicated 11.0:0 you're actually at 12.0:1 without the water / meth. |
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