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Re: Bosch 4s
I'm probably the only person here that likes Bosch plugs, although I don't have them in my Blazer (I'm doing pretty good with splitfires and I'm only using those since there were 6 new ones in the glove box)
But when I was thinking about those Bosch 4 plugs I kinda figured that they have all the spark in the world. But in theory they block the fuel mixture from getting to the spark.
And this theory is partly proven from Dyno testing where they index the plugs (aim the plugs so the spark is facing the valves) Which does give the motor a little power gain.
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