TR55's or TR6's on mostly stock?

[Brammer]

My 2002 GP GTP right now only has poly dog bones and a K&N Panel Filter. Eventually I'd like to do more, but for now that's where it stands. It needs a good tune up, would it be detrimental to run either TR55s or TR6s, or would I just be better off with the AL606s?

 

[mguzzo]

tr55 gapped to 0,055 will do just fine

 

[EHB]

if your planning on future mods (pulley drop) i'd go with the cheapest since they'll need changed again , which would probably be the 606's.

 

[Brammer]

Also, what's this I hear about not running Iridiums in supercharged cars?

 

[EHB]

thats what they come with stock ... platinums are the ones you don't want. iridium is ok stock , but if you drop pulley size you need a colder plug

 

[FordMan77]

Spark Plugs - Change out those stock spark plugs with new ones to restore any lost power. Brands that most tend to go with are either Copper Core Autolites or NGK Spark Plugs. Get these at your local auto parts store also. They range as follows in order from hottest to coldest plugs...remember...you want the hottest spark possible...so running a super cold plug on a larger pulley to combat knock isn't the best plan...ACD's, AL606's, and AL605's are basically for stock cars or very small bolt ons still running the stock S/C Pulley or modded N/A guys...you want to keep a hot spark. NGKTR55/AL104's for your 3.4" Setup, TR6's are a tad cooler...best used around the 3.25" pulley area, and AL103's...are for the extreme supercharged application...3.0" pulley or lower. Here is a picture to reference the firing order and the correct coil number if yours aren't numbered or you just need a quick reference picture: http://i33.photobucket.com/albums/d6.../plugwires.jpg

AC Delco Factory Replacements: Stock
Autolite 606: Stock
Autolite 605: 1 Heat Range Cooler
NGK TR55: 1 Heat Range Cooler
Autolite 104: 2 Heat Ranges Cooler
NGK TR6: 2 Heat Ranges Cooler
Autolite 103: 3 Heat Rangles Cooler

 

[jwach]

I have the tr55's in my 97 and all i have is a cai and everything seems to be good. Definitely better than the originals(had 90K on them).