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4.6 cammer

Sep 28, 2006 12:56 PM

what temp spark plugs

need advice for break in plugs on a 4.6 dohc forged everything and ported everthing should be around 400 hp on 93 oct. i dont know what temp range to go with or even which brand, do i need something different for break-in only?
thanks
-chris

Bitemark46

Oct 3, 2006 10:01 AM

I assume you are FI. So you want to go one heat range cooler than stock. NGK TR6's are a great choice. Cheap too. -Mark

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