Well, since I'm gonna change my cam soon I was gonna' change my plugs at the same time with the TR55s, if I need to. Which plugs do I have now? If I have iridiums or platinums ,then I prolly won't change them unless I can gain something from doing so. I pulled my plug boot and used a mirror to get some #'s from the plug, all I could get was 126623 or 326621 and they were the stock AC Delco and had a blue center on the tip where the plug wire connects. Does this help? I realy don't feel like pulling one ,but I will if need be, but I thought somebody on here might know instead. BTW ,mine is an .03 5.3 Thanks in advance.

 

stock plugs are the platinums. you probably don't want to run iridiums unless you have a SC or NOS

 

Anyone....Bueler?

 

more than likely you have platinum plugs. could be iridiums already though. just pull one and look.

 

HOw can I tell if they're iridiums>? Sorry to be stupid *** on this, but I've never really gandered at iridiums! I know what platinums look like, but what is the "tell" if they're iridiums? Are TR-55's iridiums? or what's the big hoopla with them anyway? I know the advantages of a good spark plug with the right heat index, but WTF would I change platinum 100K plugs for if not to get a real benefit of an upgrade? I guess what I'm saying is, if I don't have iridium, is it worth the upgrade and why? Thanks 02Denali, you da' man!!!!!

 

keep your stock plugs and wires. they are probably platinums.

i think the iridiums and those TR-55's and TR-6's are more used by guys using nitrous or superchargers

 

I posted this before, if they are platinums, change them. I had the little platinum pads missing on 4 of the 8 plugs when I changed mine at 30k.

 

Keuka, after reading a bunch last night I've come to the conclusion most people running NA engines are running the NGK TR55, copper plugs. The TR6's are a colder plug, mostly for folks running boost or juice. I'll prolly go with the tr55's because I have always had great luck with NGKs in the past and could give a rat's *** about platinum plugs. Very interesting what low2000 said, I only have 26K, and hate to change out 100K mile plugs, but for piece of mind, you can't put a price on that!

 

i thought about getting the copper plugs before as well. i never followed through with it yet. let me know how the NGK copper plugs work

 

Will do!!!!!