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ALJDIAMANT
Cruiser Expert
PT Cruiser Club Member
Posted: Apr 18, 2008, 7:52 PM
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Iridum spark plugs...
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Has anyone had experience using Iridum spark plugs for street use?Unmodified GT Turbo. These plugs normally require very low resistance wires.
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Posts: 127 | From: NAPLES, FLORIDA
| Registered: Apr 9, 2008, 4:50 PM
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eldersptgt
Cruiser Expert
Posted: Apr 18, 2008, 11:06 PM
Post #2 of 12
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Re: [ALJDIAMANT] Iridum spark plugs...
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Quote:
Has anyone had experience using Iridum spark plugs for street use?Unmodified GT Turbo. These plugs normally require very low resistance wires.
even w/ an unmodified PT Turbo a set of 1 stage cooler Iridiums and some MSD wires or even Mopar wires makes a big difference. Only trouble is gapping the Iridium plug since you cant just gap it like you would a copper core. you must grab the outer electrode w/ pliers Etc and gap very carefully to the tip .035 so as not to break off the Iridium. runs smoother.
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04 "SRT-4" PT Cruiser w/ AutoStick (in Sea Mist Green, 1 of 146) Stage 1, Mopar BOV, MagnaFlow 2 1/2 cat back exhaust, MSD black 8.5mm wires, Stock Champion Plugs gapped at .035, S&B Cold air intake, H&R sport springs, Progress 27mm front sway bar, Energy Suspension motor mount inserts, 06' tail lights, 06' Hood emblem, T-handle on rear glass, SRT-4 badges, factory chrome accent group, chrome door cups, 8" Mopar sub, ClearBra. 205/50ZR17 Sumitomo HTRIII tires
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Posts: 343 | From: El Dorado Hils, Ca
| Registered: Jun 15, 2007, 6:33 AM
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mean green
Cruiser Addict
Posted: Apr 18, 2008, 11:35 PM
Post #3 of 12
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Re: [eldersptgt] Iridum spark plugs...
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Quote:
Quote:
Has anyone had experience using Iridum spark plugs for street use?Unmodified GT Turbo. These plugs normally require very low resistance wires.
even w/ an unmodified PT Turbo a set of 1 stage cooler Iridiums and some MSD wires or even Mopar wires makes a big difference. Only trouble is gapping the Iridium plug since you cant just gap it like you would a copper core. you must grab the outer electrode w/ pliers Etc and gap very carefully to the tip .035 so as not to break off the Iridium. runs smoother.
What's the big difference? On my modifed 336 hp '05 SRT-4 I'm using the stock copper plus plugs gapped at .035 with MSD wires. The car pulls like an insane beast. The irridium plugs may last a little longer, but they cost more. My stock plugs cost around $7 for all four......Actually if you feel you absolutely have to have irridium plugs to feel better then a better gap is .028. 
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2005 Stone White SRT4
2004 Graphite Auto
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Posts: 821 | From: Oregon
| Registered: Feb 19, 2002, 12:00 AM
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eldersptgt
Cruiser Expert
Posted: Apr 18, 2008, 11:42 PM
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Re: [mean green] Iridum spark plugs...
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Truth be told... I have the Champions in my PT w/ the stage one Kit installed and Mopar wires. I have heard from most folks that the swap makes for a better idle for the pt while in drive at a stop light. mine shakes and rattles every thing in the car i have to pop it into N and its fine.
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04 "SRT-4" PT Cruiser w/ AutoStick (in Sea Mist Green, 1 of 146) Stage 1, Mopar BOV, MagnaFlow 2 1/2 cat back exhaust, MSD black 8.5mm wires, Stock Champion Plugs gapped at .035, S&B Cold air intake, H&R sport springs, Progress 27mm front sway bar, Energy Suspension motor mount inserts, 06' tail lights, 06' Hood emblem, T-handle on rear glass, SRT-4 badges, factory chrome accent group, chrome door cups, 8" Mopar sub, ClearBra. 205/50ZR17 Sumitomo HTRIII tires
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Posts: 343 | From: El Dorado Hils, Ca
| Registered: Jun 15, 2007, 6:33 AM
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ALJDIAMANT
Cruiser Expert
PT Cruiser Club Member
Posted: Apr 20, 2008, 12:49 PM
Post #5 of 12
(575 views)
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Re: [eldersptgt] Iridum spark plugs...
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Quote:
Quote:
Has anyone had experience using Iridum spark plugs for street use?Unmodified GT Turbo. These plugs normally require very low resistance wires.
even w/ an unmodified PT Turbo a set of 1 stage cooler Iridiums and some MSD wires or even Mopar wires makes a big difference. Only trouble is gapping the Iridium plug since you cant just gap it like you would a copper core. you must grab the outer electrode w/ pliers Etc and gap very carefully to the tip .035 so as not to break off the Iridium. runs smoother.
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Posts: 127 | From: NAPLES, FLORIDA
| Registered: Apr 9, 2008, 4:50 PM
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ALJDIAMANT
Cruiser Expert
PT Cruiser Club Member
Posted: Apr 20, 2008, 12:56 PM
Post #6 of 12
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Re: [ALJDIAMANT] Iridum spark plugs...
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Two questions. Why are Idium plug users gaping at half the recommended gap (.25 vice .50 recommended even for Idium)? Why user a step cooler plug when the car will be used street only? The Chapion Idium are unique as the ground electrode is platinum. They run $7.25 each.
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Posts: 127 | From: NAPLES, FLORIDA
| Registered: Apr 9, 2008, 4:50 PM
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eldersptgt
Cruiser Expert
Posted: Apr 20, 2008, 7:34 PM
Post #7 of 12
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Re: [ALJDIAMANT] Iridum spark plugs...
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Two questions. Why are Iridium plug users gaping at half the recommended gap (.25 vice .50 recommended even for Idium)? Why user a step cooler plug when the car will be used street only? The Champion Iridium are unique as the ground electrode is platinum. They run $7.25 each.
DCX TSB on Turbo Motors is the .050 gap is too large and caused misfire engine codes if i remember right it Goes on to state that the new gap recommended is i think like .040 but most guys already run them at .030 to .035. About the Iridium plugs and such check out this... A spark plug is a heat exchanger. a "cooler" spark plug draws more heat out of the combustion chamber so you can have a cooler charge every time it fires. But read this tech article its really good.
http://ngksparkplugs.com/tech_support/spark_plugs/index.asp?mode=nml
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04 "SRT-4" PT Cruiser w/ AutoStick (in Sea Mist Green, 1 of 146) Stage 1, Mopar BOV, MagnaFlow 2 1/2 cat back exhaust, MSD black 8.5mm wires, Stock Champion Plugs gapped at .035, S&B Cold air intake, H&R sport springs, Progress 27mm front sway bar, Energy Suspension motor mount inserts, 06' tail lights, 06' Hood emblem, T-handle on rear glass, SRT-4 badges, factory chrome accent group, chrome door cups, 8" Mopar sub, ClearBra. 205/50ZR17 Sumitomo HTRIII tires
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Posts: 343 | From: El Dorado Hils, Ca
| Registered: Jun 15, 2007, 6:33 AM
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sent1
Cruiser Expert
Posted: Apr 29, 2008, 6:25 AM
Post #8 of 12
(470 views)
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Re: [ALJDIAMANT] Iridum spark plugs...
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This is what I know: I took out stock plugs and put in NGK Iridiums right out of the box. PTC ran better than ever (even off the lot).
I have also heard basically hotter plugs are best for mostly city driving and cooler plugs for highway or racing. I know I'm good with what I've got and will take my 34 MPG highway anyday.
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DC1 #1610--5-speed. Its got some stuff.
'03 Inferno Red--Its getting some stuff too!
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Posts: 424 | From: Salem, Oregon
| Registered: Apr 14, 2007, 8:56 AM
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ALJDIAMANT
Cruiser Expert
PT Cruiser Club Member
Posted: Apr 29, 2008, 6:57 AM
Post #9 of 12
(465 views)
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Re: [eldersptgt] Iridum spark plugs...
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Are you using the Champion Idium plugs? I have seriously been looking at them. They seem to be unique as the ground electrode is platinum tipped.
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Posts: 127 | From: NAPLES, FLORIDA
| Registered: Apr 9, 2008, 4:50 PM
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eldersptgt
Cruiser Expert
Posted: Apr 29, 2008, 7:42 AM
Post #10 of 12
(457 views)
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Re: [ALJDIAMANT] Iridum spark plugs...
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Quote:
Are you using the Champion Idium plugs? I have seriously been looking at them. They seem to be unique as the ground electrode is platinum tipped.
Nope stock Copper core's. O don't have the money right now. i am buying a house and I just lost my Job Great Combo there huh! No really out motors are Japanese and a the NGK's are teh best even just the V-Power plug w/ a heat range cooler works really great.
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04 "SRT-4" PT Cruiser w/ AutoStick (in Sea Mist Green, 1 of 146) Stage 1, Mopar BOV, MagnaFlow 2 1/2 cat back exhaust, MSD black 8.5mm wires, Stock Champion Plugs gapped at .035, S&B Cold air intake, H&R sport springs, Progress 27mm front sway bar, Energy Suspension motor mount inserts, 06' tail lights, 06' Hood emblem, T-handle on rear glass, SRT-4 badges, factory chrome accent group, chrome door cups, 8" Mopar sub, ClearBra. 205/50ZR17 Sumitomo HTRIII tires
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Posts: 343 | From: El Dorado Hils, Ca
| Registered: Jun 15, 2007, 6:33 AM
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garyerrol
Cruiser Expert
Posted: Apr 29, 2008, 9:29 AM
Post #11 of 12
(450 views)
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Re: [ALJDIAMANT] Iridum spark plugs...
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I'm getting confused. I have an '01, I'm getting ready to replace the plugs and wires as I have no idea how old the originals are. Do I want Iridium or Platinum plugs? I'd rather spend a few extra now if one is better than the other for a non turbo engine.
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New owner 2001 Limited Edition. Shale Green Metallic. Factory stock except Voxx 16X7 wheels, Pirelli P3000 P205/55R16 tires, Tyco backup lights, 2006 tailight lenses, shorty antenna.
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Posts: 108 | From: Indianapolis, IN
| Registered: Dec 4, 2007, 11:50 AM
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Bluephrog
Cruiser Addict
Posted: Apr 29, 2008, 3:05 PM
Post #12 of 12
(435 views)
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Re: [ALJDIAMANT] Iridum spark plugs...
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Are you using the Champion Idium plugs? I have seriously been looking at them. They seem to be unique as the ground electrode is platinum tipped.
I have Champion Iridiums and they are great. Recently pulled them and checked them after 30K miles, they still look like new. You may not need iridiums, but they will outlast copper plugs and the very fine center electrode does give a better spark according to all the iridium plug manufacturers. I have a very smooth idle, pulls very strong to redline and have no trouble starting the engine even at 35 below zero. Most Iridium plugs only have the center electrode that is iridium, the ground strap is some other metal usually platinum.
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Posts: 667 | From: Vermont
| Registered: May 24, 2003, 5:25 PM
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