I know there have been hundreds of posts on correct WOT A/F ratios (which I am fine on upper 10's to upper 11's), but what is normal for other driving conditions, or is it that important?

I just changed my exhaust to a Invidia V4 with a HFC and I seem to be a little bit leaner at partial throttle situations, but I really didn't pay that much attention to the UEGO before I put the exhaust on unless I was going WOT. Here is what I am seeing:

cold start idle - 15.2-15.9
partial throttle cruising - 14.5-15.6
off throttle coasting - goes lean off the scale (I think that is normal)
warm idle seems normal, it fluctuates between 14.5-15.3 or so (trying to get the perfect 14.7)

I am trying to get scheduled for another tune, but am I safe until then.

Thanks guys

 

your right where you should be, partial throttle cruising seems a tad high at 15.5 but don't think its anything to cause concern

GET METH

 

That's good, it just seemed a little leaner after the exhaust. Joey, you are a hell of a spokesperson for meth injection!! I want to do it soon, just have to save a little $$ to do it. Probably will try to do that along with suspension and Seibon vented hood early next year. That's the plan anyway.

 

ahah I know I just love what it does to not only the internals (cleaning) but the reduction in CHT and EGTS, especially with the Greddy Turbo kit is awesome

Only problem is Blue dye all over my Radiator shield form the BOV


I am going to take some pics of my plugs and the inside of my Intake manifold this weekend, both of which look factory, off the lot clean