Spark Plug Opinions?

saxmanbrad

Member
:
2008 MS3 Black Mica
Hey guys, I know there are a million posts about running colder Densos, etc., but it's hard to get a real answer, as everyone's mods are different. I am running a Cobb SRI into a RPMC inlet, testpipe, and Hypertech flash. Is it worth it to try one step colder? I'm leaning towards no....also, what is a good pre-gapped plug in the stock heat range? Thanks!(freak)
 
No to colder plugs. Stay with stock heat range. HT tune recommends that. I'm one step colder only because I have a catless dp/rp and HT tune. See mods in sig. Even now I'm not sure I need colder plugs, but run them to provide a little extra protection against detonation. But I may be giving up a few horsepower to the hotter plug for that.

Gap your stock plugs at .030. If you experiment with colder ones, go down to .028 or even .026 depending on your boost.
 
No to colder plugs. Stay with stock heat range. HT tune recommends that. I'm one step colder only because I have a catless dp/rp and HT tune. See mods in sig. Even now I'm not sure I need colder plugs, but run them to provide a little extra protection against detonation. But I may be giving up a few horsepower to the hotter plug for that.

Gap your stock plugs at .030. If you experiment with colder ones, go down to .028 or even .026 depending on your boost.
Second the motion
 

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