Putting new engine in with mods. I was wondering on what spark plugs and heat range to run. It is a new 6.0 LQ4 with a Vortech Supercharger with a 2.87 pulley, water to air intercooled, Comp Cam Texas Speed .581-.591 lift and .224-.230 at .050 on 114lc. patriot springs, smith brothers pushrods, 90mm throttle body, 75lb injectors, AEM Bruteforce full length headers, no cats, 2.5" duals into 50 series flowmaster muffler. Should run around 12-13lbs of boost. Plan on running Devils Own Stage 2 meth kit in the next month after it is running. Tuned by Justin at Black Bear. Any ideas??

 

Justin will prob tell you to keep the tr 55's in there. Otherwise most of the guys are running the TR-6 plugs. I am however running the 55's

 

The 55's are hotter than the 6's correct? What is stock??

 

TR55s are comparable to stock.. TR6s are the next step colder.

 

I'm using TR-6 at .035", it's a step colder than TR-55

 

TR-6 at.035

 

Thanks for the info. I will start with the TR6's and go from there.

 

Ditto. They look excellent after 30k miles of 10lbs in a daily driver.

 

im using tr-6 at .035 as well

 

same here