^^^ I see you got jokes, huh?

Don't lie to us, like you never ran a motor that lean before.

 

I lean it out until the plug looks good and we stop picking up. My wideband says 12.3-12.5 but I only use it as reference check

 

Don't get a better answer than that^^^^

 

thx guys....ill be going to the track this weekend , gona try to break 10s...let's see how it does with the new plate

 

You are certainly right...and I guess I should have been a little more clear...

I am basically saying that my tune-up consisted of a lot more then "back of the box" jetting.

I am sure there are a ton of threads that cover the correct way to read plugs, interpret wide-bands, monitor fuel pressure and etc.

My tune-up was a balance of all these items. Anyone who solely relies on the input of a single wide-band sensor, should really rethink the limit and safety of there tune. As someone mentioned before, wide-bands should be used for nothing more then reference. Its impossible for a single sensor (or even two) to tell the full story of all eight cylinders.

So to be more specific, the leanest my dual channel FAST ever registered was 12.2, and this was on a tune where all 8 cylinders looked very good every pass, with consistent bottle pressure, and rock solid fuel pressure.

However, keep in mind everyones wide-band will register a little different due to manufacture variance, location, exhaust design and etc.

Like it has already been stated, use your wide-band as a reference, tune off the plugs. And in my opinion, pull EVERY plug, not just a few.