Re: spark plug heat range advice
Thats what im trying to get my head round, correct me if im wrong.....
i have gone from a grade 6 plug to grade 8 (2 steps colder i belive) to dissipate heat from the plug more due to increased power and boost etc
What im trying to find out is that seeing as my plug is colder due to the water/meth do i need to be 2 grades colder, or would a grade 7 be more suitable
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