Lean OR Rich?

[koukie180]

i recently retuned my ecu. i got variations of the same tune with different levels of fuel. my goal is to make decent power and maximize MPG. im not great at reading spark plugs, and in the market for a wideband AFR. am i running acceptable lean? a bit over lean? or dangerous lean? look below and let me know what you think.

spark plugs was taken off of s13 blacktop sr20det, running 550cc, z32 mafs, and everything else stock besides ecu. pics below showing a tune that gets me average 22-24 mpg (streets & freeway mixed). spark plugs are ngk iridium ix and i did not have to gap them. you can get em at FRSport (http://www.frsport.com/NGK_Iridium_IX_Spark_Plugs_Nissan_S13_S14_S15_SR20 DET_p_1253.html)

http://img443.imageshack.us/img443/6608/image001no9.jpg (http://imageshack.us)
http://img443.imageshack.us/img443/3831/image002oj7.jpg (http://imageshack.us)

[Casascacas]

http://www.ngksparkplugs.com/tech_support/spark_plugs/faqs/faqread.asp?mode=nml

Hope that helps you learn how to read plugs.

[koukie180]

after seeing those pics in the link, mine doesn't look bad at all.

[georgesal]

looks lean ghost white= lean Night black= rich
ghost white= night black= boogey monster

[Casascacas]

after seeing those pics in the link, mine doesn't look bad at all.

Yes they look pretty good to me..however you should get that wideband readout as soon as you can, more for peace of mind than anything else.