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HI
when unrestricting the flow of air and gas through the engine --as a rule from my racing days--the engine requires a richer fuel mixture---which i do believe the computers in these cars will adjust for
pull out a plug and look at how it is burning--it should be a brown paper bag color --if white you are lean--not good causes heat in the cylinders--if much darker you are running rich
REGARDS TONY
 
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