Question on spark plugs - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-25-2007, 11:31 AM   #11
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autolite 605'* are good also
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Old 06-25-2007, 03:48 PM   #12
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alright thnx for the adivice.wheres the best place to get the ngk tr55'*, and how do i order them 1 heat range colder?
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Old 06-25-2007, 09:54 PM   #13
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Quote:
Originally Posted by lammers
alright thnx for the adivice.wheres the best place to get the ngk tr55'*, and how do i order them 1 heat range colder?
Napa has them. Should be less than $2/plug. NGK TR55'* ARE 1 heatrange colder - they don't come any other way.


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Originally Posted by willwren
I prefer the NGK V-Power TR55. One heatrange colder than stock (good for any stock SC pulley or one step down), gap at .055", not .060".

I'm running NGK TR55'* @ .060" with my currently stock setup (except for the FWI). Should people be running them at .055" in stock */C applications?
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Old 06-26-2007, 12:33 AM   #14
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Doesn't make that much difference. But if you gap smaller now, you're set for the next step down.
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Old 06-26-2007, 09:40 AM   #15
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Point of note. When using NGK plugs.. always check the end to ensure the cap is screwed on tightly where the plug wire clips on. These are screw on pieces and should be doubled checked. (It saves hair pulling)

Autolite plugs do not have the screw on type caps. They are solid.
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Old 06-29-2007, 02:32 PM   #16
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thnx for the help guys. when i took off the back plugs, i noticed how bad the front plugs actually were. almost all of the center diode was gone!!!! i am guessing that means the front 3 plugs are the ones that fire reverse polarity. i took willrens advice and picked up the v-power tr-55'*, got them at a decent price, $1.89 ea alot more affordable then the platinums too.
again thnx for the help.
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