Thread: LS9 spark plugs
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Old 09-10-2013, 07:36 PM   #2
dan0617
 
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Drives: 2011 Inferno Orange SS Convertible
Join Date: Apr 2012
Location: Tyrone, PA
Posts: 640
If shut down at WOT to do a plug read, white means lean. Don't look for that heavy tan of the days of old. Slight tan, mostly clean, black up in the crevices. Look up some pics of plug reading by an Internet search, just remember ours will be cleaner than the carb setups. Also fuel and fuel additives change the coloring.
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2011 SS IOM Vert. ECS Vortech 13+ psi, Water/Meth, ID850’s, ZL1 pump with MSD Voltage Booster, 2800 stall, LT headers, Drag radials, Drag alignment, Cradle Bushings. A million other supporting mods. Tuned by Ted.
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