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Iridium or not?

Author	Comment
stockboy	Iridium or not?	Lead	[-]
GTP World Enthusiast Getting their feet wet!! kudo's master Posts: 5 (07/03/08 08:59 AM) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts Report Post	Tags : None I have heard mixed things about iridium spark plugs in a GP. I currently have NKG Iridium plugs and am wondering if I should go back to a copper, or even platnum core. Any thoughts?
Condore21	plugs	#1	[-]
GTP World Master of torque (4000 club) Knows what to say to help!! kudo's parade!! Posts: 3815 (07/03/08 10:08 AM) GTP World Un-named Man In Waiting Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts Report Post	Here's what I think. If you are stock, then use the NGK IX's. If you have a basic 3.4" pulley, then use the copper autolites. Reason being, the iridiums are good for low boosted applications, we have 6-8lbs stock. Once you start being modded and pushing the 10-12# limits the iridiums might not be your best bet b/c you can not gap them. The tip is too fragile and will break if you try to gap them. They are also not as cold of a plug. They might be a more technologically advanced plug, but I don't know if I would trust it as a better heat extractor than a colder plug. Have a read here and make up your own mind though; http://www.zzperformance.com/grand_prix/products1.php?id=240 __________________________________________________ "Rock it 'til the wheels fall off" '02 Silvermist GTP Coupe. 3.4" pulley, SLP "power flo" cat-back exhaust, 3"Downpipe, SLP ram air hood, SLP cold air intake, TB heat shield, DHP 1.0 PCM, 180 t-stat, Autolite 104's, front/rear strut tower braces, Dual Aeroforce gauges, boost gauge, black headlight housings/xenon bulbs. Still in boxes - SLP Headers, SLP 1.8 RR, ZZP 3.4/3.25" MPS, GMPP Handling Kit, ZZP S1 TB, throttle body spacer, f-body brakes, and ZZP shift kit.
stockboy		#2	[-]
GTP World Enthusiast Getting their feet wet!! kudo's master Posts: 6 (07/03/08 10:15 AM) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts Report Post	Thanks man. I'll probably stick with the IX only because the car is practically stock.
copterdoctor		#3	[-]
GTP World Nobel Prize Winner (1000 Club) Knows what to say to help!! kudo's my friend kudo's Posts: 1737 (07/03/08 11:23 AM) GTP World Top Brass Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts Report Post	I've always been a copper plug man myself. when I do spark plug changes, I also do a compression check to monitor engine wear and potential problems. If I were to run iridiums or platinums they are supposed to be changed 60-100,000 miles depending on manufacturer and such. Since I run coppers, I replace them every 30,000 miles and it forces me to check my engine more often. -Matt +176,000 miles and counting Wizaired cloned, 180* thermistat, AL104, Autotap GM enhanced, EGR delete, rear O2 delete
saxplaya07		#4	[-]
GTP World Janitor (3000 Club) Getting their hands dirty!! kudo's my friend kudo's Posts: 3127 (07/03/08 11:44 AM) GTP World Funk Kid Dynomite Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts Report Post	copper's.......iridiums and platinums retain heat.......if youre stock i'd still go get some autolite 605s(one heat range colder than stock).......thats just me.... Damien. gm's 3.8 litre v6 is just well.............GM3800.......bullet proof stock passenger side corner in the for sale section go check it out LOL
gtpforever		#5	[-]
Talkin' smack! (9000 post club!) Old fart but knows their stuff!! Forced inducted kudo's Posts: 9051 (07/03/08 02:29 PM) GTP World Owner/Administrator Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts Report Post	stockboy wrote: I have heard mixed things about iridium spark plugs in a GP. I currently have NKG Iridium plugs and am wondering if I should go back to a copper, or even platnum core. Any thoughts? Iridium & Platinum are the same thing in the automotive world. True platinum is not used on any plugs from any brand, they all use Iridium cause it is stable in our uses and holds together in which Platinum will not cause it becomes brittle. The Iridium is from the same family as Platinum and looks pretty much identical to it. Its just the physical properties thats makes them different. But since you are stock do like everyone said choose the ones they recommend. Troy Now driving....1998 Silvermist GTP with 155,000 miles! Current Mods: XP Hot cam, Stage 2 Ported Heads, Ported M90, 3.0" MPS, 42.5 Lucas flowmatched Injectors, LS6 MAF, North* throttle body, TOG headers, Intense Shift Kit, CAI, 180 T-Stat, DHP Powr Tuner. All rolling on a GMPP Handling Kit, Sprint 1.6" lowering Springs on SpringTech Struts with an SD rear wing and SD front airdam!

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