Do any of you guys run heat grade 8's? (not F/I)

[MrRy]

Just curious as the HKS plugs I removed from my car were heat grade 8 (denso hks s40i) yet I would only run 7's on an N/A engine unless it was quite highly tuned.

I only ran 8's on my DC2 due to the turbo setup, otherwise I would of ran 7's at most.

Wondered if there were any benefits to grade 8's in a fairly standard K20 engine.

Cheers
Ry

 

[C&S Evo7]

not really, except that they could well be too cold for the na and could cause a misfire, i would stick to 7's myself