LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Spark Plug Question

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Old Jul 28, 2004 | 01:35 PM
  #1  
klpps's Avatar
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From: Thousand Oaks
Spark Plug Question

It's time to replace my plugs and was wondering what your guys' opinion was on replacing my denso iridium plugs or just going w/ the tr6's. The difference is about 50 bucks. You guys think its worth going w/ the idiridium?
Old Jul 28, 2004 | 02:54 PM
  #2  
truedualws6's Avatar
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From: Downey, CA
Re: Spark Plug Question

Although I only have about 500 miles on then I went with the
Delco Rapidfire #14 plugs at the last change. I really liked the
way they looked and reports from others were good too. Just
my $.02.
Old Jul 28, 2004 | 03:07 PM
  #3  
Ultra_Dog's Avatar
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Re: Spark Plug Question

I just replaced my Autolite 103s with Desno Iridiums, and I can honestly say they did not make a squirt of difference.
Old Jul 28, 2004 | 03:14 PM
  #4  
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From: Sellersburg, IN, USA
Re: Spark Plug Question

Save the $$ and go with the TR6's

-Tony
Old Jul 28, 2004 | 03:48 PM
  #5  
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From: Elkins Park, PA
Re: Spark Plug Question

I thought the plug to use was a TR55?? gapped at .050/ Isnt that the replacement plug from NGK
Old Jul 28, 2004 | 04:11 PM
  #6  
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From: Sacramento, CA 95820 USA
Re: Spark Plug Question

Originally Posted by truedualws6
Although I only have about 500 miles on then I went with the
Delco Rapidfire #14 plugs at the last change. I really liked the
way they looked and reports from others were good too. Just
my $.02.
what is the difference between teh ac delco 14 and 41-906?
Old Jul 28, 2004 | 04:18 PM
  #7  
Mystic95Z's Avatar
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From: Sellersburg, IN, USA
Re: Spark Plug Question

He has N20 listed in his mod list. You should use a colder plug gapped at .035 for N20.

-Tony

Originally Posted by 95z6spd
I thought the plug to use was a TR55?? gapped at .050/ Isnt that the replacement plug from NGK
Old Jul 28, 2004 | 06:09 PM
  #8  
95z6spd's Avatar
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From: Elkins Park, PA
Re: Spark Plug Question

ok gotcha. I missed the N20
Old Jul 29, 2004 | 12:17 AM
  #9  
truedualws6's Avatar
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From: Downey, CA
Re: Spark Plug Question

Originally Posted by tomatocity
what is the difference between teh ac delco 14 and 41-906?
Oops, I missed the N20 too. My bad.

The 41-906s are the original/stock plats that everyone complains about. The
puck comes off and they don't look as nice as the Rapidfires.

Rapidfire Plug

Last edited by truedualws6; Aug 2, 2004 at 08:57 AM.
Old Jul 29, 2004 | 12:01 PM
  #10  
klpps's Avatar
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From: Thousand Oaks
Re: Spark Plug Question

how many mi's after you should replace your plugs? my iridium plugs have about 40k on em, u think I should just tell my mechanic to leave em in?
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