Going on 45k miles on the 05 with Radix and wondering what folks have seen of the factory plugs life wise.

 

Mine were at about 77,000 when I left them in my old heads. More than 20,000 with the blower at that point.

 

my brothers stock 5.3 had 74k miles on the Iridiums.. it wouldnt idle or run good, come to find out the end of it had a hole clean thru it..

 

I wouldn't wait 100k with a blower, although I've seen Toyota Iridiums go to 150k and beyond with the engine running perfectly.

 

My stock plugs came out at 115,000 miles, and still looked new, even the gap was still correct. Of course, I put the iridium plugs back in(new). After I installed the Radix, I had serious spark-knock immediately, so I installed NGK TR-6 at .035 I think, as recommended by Joe at LeftCoast(he is the man!!)

I have had no problems since, and they are a helluva lot cheaper. Probably good for about 30,000 miles.

 

Thanks,
I'll start looking at changing them. I have no knock so I'll stay with what I know. I was Dyno tuned with the current heat range.
Are there any preferred plug wires out and about?

 

Most say just get some new stockers no difference performance wise unless you just want a pretty color.

 

I've always had nothing but problems with non gm plugs. I'd just put new delco's in and be done

 

Yeah, I hear ya. I had some taylor 409's and they practically fell apart during my LT install. I wasn't prepared so i had to rig them and use some long wires from some old chevy to get me to the auto parts store. funny as ****.