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Forum namePerformance/Engine
Topic subjects-afc tuning
Topic URLhttps://forums.2gnt.com/dcboard.php?az=show_topic&forum=i5&topic_id=49733
49733, s-afc tuning
Posted by berzerkled, Apr-24-03 05:12 AM
Can people that have theirs tuned please please put up what points you have your fuel curve at on both high and low? That would be awesome, thanks..I know I should really get it tunned myself but I just want a general idea of what others have it at.

Oh yea i'm running at -16% 1000rpm, -14% 2000rpm, -13 3000rpm etc on high and all 0% on low.
Is that too lean for someone with a high mileage engine and is n/a with only cai and catback exhaust?

49738, RE: s-afc tuning
Posted by Michael_97RS, Apr-24-03 06:48 AM
What pressur esetting are you running? what approximate O2 sensor voltage are you seeing?

It seems a bit high of a correction factor, but what pressure in/out do you have the S-AFC set at.



15.9 @ 86.7mph

Injen CAI, 55mm TB, P&P Intake, Crower Cams, Hooker Header, ERT/Catco Cat, GS-T Muffler, AFX UDP, Crane Ign Amp, S-AFC
49752, RE: s-afc tuning
Posted by berzerkled, Apr-24-03 11:45 AM
okay
in/out i have at 7, pressure setting is the last one, karmen or whatever
o2 sensor voltage is the middle one in the sensors screen right? that one is always around .4 to .9, never seen it over 1
thanks so much man
49753, RE: s-afc tuning
Posted by BoostedGS, Apr-24-03 11:53 AM
The SAFC can't read the Karmen count from our cars. You should change it to read manifold pressure, or whatever the SAFC calls it.
49754, RE: s-afc tuning
Posted by Michael_97RS, Apr-24-03 12:01 PM
The type needs to be pressure.

What are you tuning to then, if you don't have A/F meter? And you may be confusing the TPS signal with the O2 voltage, unless you did the blue wire mod then the S-AFC doesn't read O2 voltage.

If you are NA at WOT, you are looking for .88 to .92 volts at the O2 sensor. Below that and you are lean and could cause some damage.

Do not tune an S-AFC without OA/F Metering, and preferable an EGT!!!



15.9 @ 86.7mph

Injen CAI, 55mm TB, P&P Intake, Crower Cams, Hooker Header, ERT/Catco Cat, GS-T Muffler, AFX UDP, Crane Ign Amp, S-AFC
49757, RE: s-afc tuning
Posted by berzerkled, Apr-24-03 12:20 PM
i'm not tuning it with anything lol i didn't do the blue wire mod either..i just want to know what %'s are safe for me to put in there.
and yea i just checked it's not karmen it's at pressure
49795, RE: s-afc tuning
Posted by VX100, Apr-25-03 05:52 AM
that's probably too lean, at least it will be at high rpms and WOT (the car runs richer in low gears, leaner in high gears)

check here:

http://www.2gnt.com/nuke/modules.php?name=Sections&op=viewarticle&artid=52

that should help a bit ;)
49804, RE: s-afc tuning
Posted by berzerkled, Apr-25-03 08:03 AM
yea i just set up my highs to what he has but what should i put my lows to? just 2% less on each one?
thanks man