Spark Plugs

[oleshifty]

I changed my plugs/wires at 100k, I'm at 163k now. Figure it's about time to do it again.


I went with ac delco wires/platinum plugs first time around (since originals were still working great at 100k)


What is everyone on here running?


I've been thinking about upgrading to the MSD wires since they are 8.5mm, they are run about 75 at my work, figure I can get them a little cheaper off ebay. Autozone brand wires are 28, and I've never heard any complaints but they are only 7mm.


For plugs, I'm thinking the new delco iridium plugs. They are $7 a piece. I have heard a bunch of talk about NGK on here. Wasn't sure what part number people use/ how long they get out of them. The iridiums are like $8 and the platinum are $3. Is there any performance/gas mileage difference IF they don't last as long. I don't mind having to change them every 50k miles if they are better.



Thanks

[oleshifty]

Also found a brand called "Rally", the wires are 8.5mm and are only $30. Anyone have any experience with them? Don't want to go cheap, but saving a buck or 2 never hurt anyone.

[truckinL33]

Taylor 98005 ThunderVolt 50 10.4 Wires GM LS1 Truck

NGK TR6 14mm x 5/8" Hex V-Power Resistor Projected Insulator Spark Plug Tapered Seat

[oleshifty]

how long those plugs normally last? And why are they better (but those are the ones I was talking about)

[truckinL33]

They're just copper plugs one step colder than factory. I put new ones in every year, but you can prolly do 30k on them.

[oleshifty]

Better power/gas mileage? Or you just use them because they are cheap? I like idea of every 75k miles lol

[truckinL33]

Helps keep cylinder temps. down, and you can spray 75-100 without having to change the plugs. The ACDelco iridium ones go 80-90k, but you can't gap them really.

[oleshifty]

ya...these will just be in until I get the truck ready for the turbo (which will probably be another 35-40k miles at this rate) truck is N/A now.

Colder plugs on a N/A motor usually HURT power

[truckinL33]

True, but I've only seen power increases with one step colder on LS engines.

[Maui4x4]

NGK TR-5 @ .045. After about 10k miles they still look great and were about $2.25 a plug.