plug choice

[sweet89s13]

i have a 03 4.6 with a p1sc & intercooled and i wanted to change the stock plugs to better ones. I just wanted to know if I should go a step colder or stay stock? any help would be greatly appreciated.

 

[DropTopPony]

NGK TR6 is a very popular plug on Boosted applications...i think its 1 range cooler if i remember correctly.

 

[Kilgore Trout]

With s/c you are going to want to be 1-2 steps colder.

 

[sweet89s13]

i kinda figured so, but i just wanted to know what plugs you guys with superchargers run for plugs so i know what to get. Thanks for all the input so far

 

[Kilgore Trout]

Motorcraft and NGK would be the only brand of plugs I would recommend.

I personally use Motorcraft AGSF12-FM1 @ .032 (two heat ranges colder than "stock")

Here is an informative thread for you to read: http://www.svtperformance.com/forums/showthread.php?threadid=26529