Thread: Original Tires/Spark Plugs

Spark plugs are iridium (read, expensive and a waste of money). The original wires are probably along the lines of AC Delco.

You do not want to put original type spark plugs in the car anyway, the cars are prone to KR in stock form as it is. Do yourself a favor and get one step colder on the plugs.

Tires should be whatever you feel comfortable running...but most of the time the factory tire size is 225/60/R16.

As for plugs...old motor technology...use old spark plugs. Autolite 606's gapped @ .055".

Done. For wires...get Duralast Lifetime warranty ones from AutoZone,

AL 606's are one step colder, correct? I've got AL 104's and I know those are 2 steps colder.

No, AL606's are stock equivalent...605's are just a tad cooler.

Originally Posted by quickster

Good information, thanks. I was thinking the same thing. Having to change them more often, as hard as the back ones are to get to, doesn't look fun. But I will take your advice and go with the Autolites. So, the concensus is AL 606 @ .055"?

Yes stick with the stock heat range you don't need colder plugs on a NA car.

just walk up the counter and ask for autolite plugs. I dont think they list them on the internet on there website.

Yeah, don't tell them what it's for, just say you need 6 autolite 606 copper plugs.

Originally Posted by starscream5000

Yeah, don't tell them what it's for, just say you need 6 autolite 606 copper plugs.

That is exactly what I did at Advanced Auto.

Ok, so I have an 05 GTP, 80k miles, probably a good idea to change them by now... What do you guys recommend I put in there? I'm new to the whole boost stuff... I've got lots of experience in N/A... Are the NGK TR55's cooler then my stockers? Or should I go TR6's? Or should I stay away from NGK's with boost? I'm running NGK TR55's in my Vette N/A.

I ran tr6's in mine, I liked the plug. I got Less misfires at idle then with the autolight 103s, but alittle bit more KR. If your stock NGK TR55: 1 Heat Range Cooler. TR6=2 colder. Not sure of the stock heat range NGK plug, But there fine to run on boosted car Ls1freek

Originally Posted by 01gpgt01

I ran tr6's in mine, I liked the plug. I got Less misfires at idle then with the autolight 103s, but alittle bit more KR. If your stock NGK TR55: 1 Heat Range Cooler. TR6=2 colder. Not sure of the stock heat range NGK plug, But there fine to run on boosted car Ls1freek

Thanks man... Hmm, mabe I should be running a hotter plug in my Vette lol

Oh BTW, how many miles will the TR's normally go?

50K miles+. There Iriduim

Hmmm.....