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best spark plugs for LS1

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Old May 4, 2010 | 09:17 PM
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Default best spark plugs for LS1
General question what are the best brand spark plugs for a ls1 motor
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Old May 4, 2010 | 09:56 PM
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NGK TR55's
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Old May 5, 2010 | 09:41 AM
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For an NA combo I would go NGK TR55's. You will have to replace them more frequently than say a Delco but for the price and performance, you can't beat them. If you plan on putting a small power adder on the car, I would change to a TR6 from NGK. Let me know if you need a set. We have several of both on the shelf.

Jon
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Old May 5, 2010 | 09:48 AM
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I put the platnum NGK TR55's in my car, I wonder how long they will last.

See link...
https://ls1tech.com/forums/generatio...omend-why.html
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Old May 5, 2010 | 01:33 PM
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Well if your LS1 is a picky bastard like mine you will run the stock AC Delco 41-110. I had tried the NGK's in my 99 T/A and had no issues. Used them in many other cars as well. Well got my 04 GTO and installed the NGK's and it ran like crap. Had random miss fire codes and so i bought some more plugs ( same NGK's ) still doing it. Changed wires. Kept doing it. Said screw it bought the AC Delcos and never had a miss fire since.
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Old May 5, 2010 | 02:09 PM
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I put them new E-3 plugs in my 02 SS and they seem to work great and i get about 22mph in the city.
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Old May 5, 2010 | 07:23 PM
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my vote is for the NGK TR5IX iridiums
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Old May 5, 2010 | 09:09 PM
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I run and recomend regular old plan autolite 103s
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Old May 19, 2010 | 07:51 AM
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Originally Posted by mark21742
I run and recomend regular old plan autolite 103s
x2! the platinums though.
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Old May 19, 2010 | 06:38 PM
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Originally Posted by buddha845
my vote is for the NGK TR5IX iridiums
Thats what I run ^.
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Old May 20, 2010 | 12:15 AM
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i have the NGK TR6s...i will be installing them tomorrow. does anyone know off the top of their head what the gap is supposed to be? if i remember correctly its .5 but could be wrong.
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Old May 20, 2010 | 12:53 PM
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Originally Posted by bwilde86
i have the NGK TR6s...i will be installing them tomorrow. does anyone know off the top of their head what the gap is supposed to be? if i remember correctly its .5 but could be wrong.
I've got my 6's at .038
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Old May 21, 2010 | 12:18 AM
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Originally Posted by buddha845
my vote is for the NGK TR5IX iridiums
Same here. My car didnt seem to like the TR55s after running the Iridiums for a while, so switched back to the Iridiums and seems like she was happy again.
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Old May 21, 2010 | 12:22 AM
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i went with ac delco iridiums gapped at.040.....no complaints
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Old May 21, 2010 | 12:24 AM
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TR55's, and they're $1.89 at your local parts store.
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Old May 21, 2010 | 08:21 AM
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^^^yep, I been running a .050 gap for a while with no issues.
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Old May 21, 2010 | 01:05 PM
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running platinum TR55s gapped to .50, car seems to run a little smoother than it did with the regular TR55s.
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Old May 21, 2010 | 01:44 PM
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Originally Posted by blk/slvr02ss
I put them new E-3 plugs in my 02 SS and they seem to work great and i get about 22mph in the city.
Me too, no idea what my gas mileage is but it seems a little better
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Old May 21, 2010 | 02:20 PM
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AC Delco 41-110
at .50 gap.
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Old May 21, 2010 | 06:10 PM
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I had NGK's on my Grand Prix (the beater) and it ran crappy. I switched to Autolites and it smoothed out. I'll be using AC Delco's on the T/A though
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