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Spark plug issue.

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Old Mar 28, 2018 | 06:55 PM
  #1  
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From: Denmark.
Default Spark plug issue.

Hi guys, I'm from Denmark and I have a carbureted stock LS3 515/376 that makes about 600 hp. I have a spark plug missing a little piece of the tip of it. "don't know the name of it" electrode?
It's cylinder 8, and the engine have very few miles on it.
My question is what spark plugs would you recommend?
Current plugs are acdelco 12621258 41-110.
Thank you ☺
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Old Mar 28, 2018 | 07:27 PM
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The standard here seems to be the ngk tr55.
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Old Mar 28, 2018 | 07:29 PM
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[QUOTE=jaxcam02;19864628]The standard here seems to be the ngk tr55.[/QUOTE

OK, great, I will take a look at that, thanks. ​​​​​​​
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Old Mar 29, 2018 | 08:53 AM
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Default Burned Plug = Read Help REQUIRED

Hi CP, I sell many IGN-1A coils in your area, that last order of 144 pcs. went to Max Tuning in Finland.
TRUST, I know cylinder ignition as do many here at LS-1 Tech.

I ask about your ignition fitted ?

I ASK you to send (post) a picture of your spark plug BOTH a good/bad plug picture.

The Spark Plug has been DAMAGED by a POOR tune is MY Guess.

DID you TDC the Spark Instant for "0" ?

Lance
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Old Mar 29, 2018 | 10:56 AM
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I tried to upload a picture, maybe there is some delay.
​​​​​​I'm sorry but I don't understand your last question .
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Old Mar 30, 2018 | 10:40 AM
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Default LS Spark Verification

Hi CP, sure I will better state.

The LS engine has a reluctor wheel placed into the crankshaft. (24ex ?)

THAT placement is ALWAYS off by up to 13.5* as measured by TDC reference to a "0" mark placed onto the front pulley.

MY IGN-8 allows for a "trim" adjustment for TDC "true" of the Spark Advance value.

I asked for information about the fitted Ignition ?

Lance
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