I can only assume it is somewhere but I couldn't find the answer. Putting a fairly aggressive cam in a 5.3 RCSB any reason to put anything other then a stock plug? Regardless of stock or not what is the recommended plug?

 

Tr5 on weak timing, tr6 with a lot.

 

We will be putting the timing 1 degree past detonation! TR6 is one colder just like nitrous?
What is the part number?

 

Ive been running my truck with stock plugs for over 60k miles with no problems.

 

Tr6 is 4177

Yes is colder. Stopped all of my knock.

 

Stock will be fine for cam only

 

Depends on cam and other mods. I would probably go one step colder on the plug too.

 

Atomic. Will we loose anything going one colder?
Fuel economy or performance? He may be driving this down to TX to work for an oil company.

That being said I would assume taking the truck to the heat of TX would warent the colder plug more then saving .01 MPG heading down there?

 

What brand is the 4166. I think I put NGK in THE HD but I don't remember and don't feel like tracking through the muddy back yard to the garage.

 

No you wont loose anything going 1 step colder. Ambient temps are nothing compared to the temps in the combustion chamber.