LS2 Sparkplug Gapping
01-10-2011, 09:36 AM
#1
Launching!
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LS2 Sparkplug Gapping I've been wanting to get some iridium plugs for my car and was thinking some NGK tr55ix's or possibly densos. I found several sites saying the gaps from the factory are .060 but also have found one or two that said the stock gap was .040 
.
When I went to advanced, autozone, and napa I couldn't find them pregapped at .060, only other random gaps from .035 to .050.
Can anyone shed some light on this?
Thanks,
Eric
. When I went to advanced, autozone, and napa I couldn't find them pregapped at .060, only other random gaps from .035 to .050.
Can anyone shed some light on this?
Thanks,
Eric
01-12-2011, 02:49 PM
#5
I've been wanting to get some iridium plugs for my car and was thinking some NGK tr55ix's or possibly densos. I found several sites saying the gaps from the factory are .060 but also have found one or two that said the stock gap was .040 .
When I went to advanced, autozone, and napa I couldn't find them pregapped at .060, only other random gaps from .035 to .050.
Can anyone shed some light on this?
Thanks,
Eric
. When I went to advanced, autozone, and napa I couldn't find them pregapped at .060, only other random gaps from .035 to .050.
Can anyone shed some light on this?
Thanks,
Eric
They need nothing special, especially gaps.
Buy either the NGK TR5 or TR55 plugs, they are both identical plugs, they just come gapped differently from the factory.
Buy a gapper and gap them to .050. That gap works perfectly for any LSx engine, whether its bone factory stock or a 600 RWHP N/A big stroker engine.
Unless you have nitrous or forced induction you can't perform better with a .040 or a .060, you will see ZERO difference. I've tried gaps from .035 to .060 when I was stock and with my current 427ci. ZERO difference in performance and/or gas mileage. Engine runs 100% identical throughout the rpm range, at 30 mph and when I do 175 mph runs. Why, because its nothing special, its a normal every day V8. Don't put too much thought into it.
Iridiums....waste of money. They will do nothing that the regular NGK won't do.
.
01-12-2011, 07:34 PM
#6
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LS1, LS6, LS2, etc.......they are all the same ole V8 engine. There are no special gap sizes for the LSx line of blocks. They are just different blocks and they are every day, regular V8 engines, they are nothing special in the automotive world.
They need nothing special, especially gaps.
Buy either the NGK TR5 or TR55 plugs, they are both identical plugs, they just come gapped differently from the factory.
Buy a gapper and gap them to .050. That gap works perfectly for any LSx engine, whether its bone factory stock or a 600 RWHP N/A big stroker engine.
Unless you have nitrous or forced induction you can't perform better with a .040 or a .060, you will see ZERO difference. I've tried gaps from .035 to .060 when I was stock and with my current 427ci. ZERO difference in performance and/or gas mileage. Engine runs 100% identical throughout the rpm range, at 30 mph and when I do 175 mph runs. Why, because its nothing special, its a normal every day V8. Don't put too much thought into it.
Iridiums....waste of money. They will do nothing that the regular NGK won't do.
.
They need nothing special, especially gaps.
Buy either the NGK TR5 or TR55 plugs, they are both identical plugs, they just come gapped differently from the factory.
Buy a gapper and gap them to .050. That gap works perfectly for any LSx engine, whether its bone factory stock or a 600 RWHP N/A big stroker engine.
Unless you have nitrous or forced induction you can't perform better with a .040 or a .060, you will see ZERO difference. I've tried gaps from .035 to .060 when I was stock and with my current 427ci. ZERO difference in performance and/or gas mileage. Engine runs 100% identical throughout the rpm range, at 30 mph and when I do 175 mph runs. Why, because its nothing special, its a normal every day V8. Don't put too much thought into it.
Iridiums....waste of money. They will do nothing that the regular NGK won't do.
.
I'm aware what exactly a lsx engine is, but I thought that the plug gap could vary depending on the stroke, head setup, and how much fuel is being dumped.
So what would you need to gap a plug for if they will be identical from .035 to .060?
