Quote:
Originally Posted by priobe
ERA Chas,
I really dont under why race gas is need to analyze a plug. I understand there are detergents and ethenol in gas now-a-days but you can still read plugs with this fuel
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Other than pig rich or
oil soaked you cannot get the fine color grades because of the gas additives used at the pump. They impart their own plug deposits which mask the actual combustion characteristics.
A quote from Barry Rabotnick's book on page 143:
"Unleaded fuel won't give good visual data."
More expensive but far better for Weber analysis would be wide band oxygen sensor equipment.