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#8 (permalink)

06-15-2009, 04:33 PM

Bobcat

CC Member

Join Date: Apr 2007

Cobra Make, Engine: # 757 ERA 427 SC , 482 Al. big block

Posts: 896

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Just curious .... when I was racing and checked plugs for detonation , we always looked for flecks of aluminum ( silver specs ) on the insulator . Those specs were small bits of the piston(s) coming off and depositing on the insulator . I`m not familiar with the grey color you mention .... but I learn new things every day .

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