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Some Corvette engine combinations prefer more spark-plug gap thanothers. A gap of approximately 0.025 inch is commonly used inconjunction with early Corvette point-triggered ignitions. On the otherhand, contemporary electronics can easily fire gaps in the range of0.045 to 0.060 inch (or more).
How to Select and Service Spark Plugs

Some Corvette engine combinations prefer more spark-plug gap thanothers. A gap of approximately 0.025 inch is commonly used inconjunction with early Corvette point-triggered ignitions. On the otherhand, contemporary electronics can easily fire gaps in the range of0.045 to 0.060 inch (or more).  View Related Article

 

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