Yeah I always used to run one heat range colder than stock...never the other way.
Which I imagine is what they did when the chose the stock plug, eh?I was taught by a engineer at Ford who has done combustion testing. Run the hottest plug without having pre-ignition, this gives ultimate combustion efficiency while maintaining maximum power through out the fuel curve.
Yes exactly.Which I imagine is what they did when the chose the stock plug, eh?
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