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About LinkBackscurrently running a 3.4 with a supporting mods and few more, had al104 coppers but when upgrading wires plug cracked so was think of going with a better plug maybe iridium plugs... which is the best to get?
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spark plugs
This is a discussion on spark plugs within the 3.8L V6 Supercharged (L67)(L32) forums, part of the Engine category; currently running a 3.4 with a supporting mods and few more, had al104 coppers but when upgrading wires plug cracked ...
- 07-02-2011 #1SE Level Member
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spark plugs 
MODS: 3.0 MPS, CAI, SD Headers w/Custom 3"DP, 160* T-Stat, NGK TR6, Full Size intercooler, #42.5s, Ported LIM & Gen III, LS1 TB w/85mm MAF , s1x Cam, #90 Springs, Intense Pushrods, EGR Delete, Cat and U Bend Delete, Magnaflow Resonator & Mufflers, Fully Built ZZP Trans, 2800 stall Tuned by KHP Peformance
- 07-02-2011 #2#AINTCARE
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Re: spark plugs Most people run AL104s without any issues on a 3.4 pulley.
I believe a 3.2 pulley is when you want to drop to AL103s.2005 Grand Prix Base For Sale: 135k Miles, Runs and Drives Great- PM for more info.
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- 07-02-2011 #3Totally Banned, Bro.
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Re: spark plugs Copper plugs for modding...replace the 6 plugs for a buck a piece...vs. the what...6 or 7 bucks A PLUG for iridiums?
Buy some more AL104's and gap them at .050"...done and done.01gpgt01 likes this.1998 Silvermist GT Coupe - All the N/A couldn't help it...
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- 07-02-2011 #4SE Level Member
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Re: spark plugs Could maybe a bad wire cause it to crack or maybe when installing them it maybe broke and didnt notice til idle was off a bit
MODS: 3.0 MPS, CAI, SD Headers w/Custom 3"DP, 160* T-Stat, NGK TR6, Full Size intercooler, #42.5s, Ported LIM & Gen III, LS1 TB w/85mm MAF , s1x Cam, #90 Springs, Intense Pushrods, EGR Delete, Cat and U Bend Delete, Magnaflow Resonator & Mufflers, Fully Built ZZP Trans, 2800 stall Tuned by KHP Peformance
- 07-02-2011 #5SE Level Member
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Re: spark plugs Gap to 0.50 or 0.60 cause thats what i was told to gap to?
MODS: 3.0 MPS, CAI, SD Headers w/Custom 3"DP, 160* T-Stat, NGK TR6, Full Size intercooler, #42.5s, Ported LIM & Gen III, LS1 TB w/85mm MAF , s1x Cam, #90 Springs, Intense Pushrods, EGR Delete, Cat and U Bend Delete, Magnaflow Resonator & Mufflers, Fully Built ZZP Trans, 2800 stall Tuned by KHP Peformance
- 07-02-2011 #6Pretty colours
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Re: spark plugs start at .050 then move up to .060 till it starts missing, then tighten it up a bit.
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