On the value of frequent plug changes. Gap difference after 9k mi.

[EfiniX]

Thanks, 89Patches. This is right along the lines of where I'm at. 25psi on 92oct. supporting mods, but I don't flog the car hardly ever. 0.026" gap on BR7ES plugs and swap them every other oil change seems like a perfectly reasonable way to go.

 

[G]

Gst, look at the electrode on the Iri race pic I posted. They also make one step more extreme with no electrode for massive boost or long endurance racing.

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[prove_it]

1.3% more power!! Holy crap that's like almost not completely worth the extra money!