What plugs and gap for 5.3 with supercharger
10-05-2011, 08:07 AM
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10-05-2011, 03:33 PM
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To each his own, but I would say run the BR6EF vs. the TR6. The TR6 has a projected tip which will work, but why take a chance. I've run TR6's (9psi boost) and didn't have problems and others have run more boost, but typically in boosted applications its recommended to run non-projected plugs.
I would keep the heat range the same though (BR6EF). FWIW, I just switched out some BR7EF's for the BR6EF's today. I was running a very aggressive tune last year and was borderline knock so I was running a little colder plug (BR7EF). Since I added the meth injection, the knock is a thing of the past so I went one heat range hotter (BR6EF). I'm happy with these thus far and it seems like my idle is a little cleaner.
NOTE: The 6's are one range colder then stock. The 7's are two ranges colder. I gapped my plugs at .035.
Good luck.
I would keep the heat range the same though (BR6EF). FWIW, I just switched out some BR7EF's for the BR6EF's today. I was running a very aggressive tune last year and was borderline knock so I was running a little colder plug (BR7EF). Since I added the meth injection, the knock is a thing of the past so I went one heat range hotter (BR6EF). I'm happy with these thus far and it seems like my idle is a little cleaner.
NOTE: The 6's are one range colder then stock. The 7's are two ranges colder. I gapped my plugs at .035.
Good luck.
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