Turbo John Racing Uncategorized Spark Plugs or Data Logger?

Spark Plugs or Data Logger?

Who wins the argument? Who helps you make the final tune up call? It’s really a combination of both, but the spark plug was in the hole and started the combustion process! It’s closer to the action than the wideband or what someone else’s similar combination uses. Trust what the plug is telling you! Is it too rich or lean? Need more or less timing? Pull those plugs!!!!!

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