Quick question

[Len Sabatine]

    Read Plugs , Watch for "pepper" [ 2 much lead  / detonation ]. Tuning 
for Lean
    Best - power is the fastest in both ET and  Engine Melt Down.  Always 
tune to
    Rich -Best power. Not "quite" as fast, At least , you get to make 
another "pass"
    without scraping pistons off the bottom of the pan. Every engine is 
different in
    AFR / Spark tolerance.   In the end,  consistency wins. 100 lbs removed 
from
    car is about a tenth. [ Quick Answer :].
    Len

>Would a 13.2 WOT air/fule ration be considered too lean ?  Going from 11 to
>12 gave me a tenth in the 1/4 mile. Could 13 be considered fairly safe ?
>This is for a speed density TPI Z28 with a 730 ECM and quite a few mods.
>
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