C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Which Spark Plugs??

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Old May 15, 2006 | 12:10 AM
  #1  
YoungGunVette's Avatar
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Default Which Spark Plugs??

Been looking around trying to figure out which plugs to run so I figured this would be the best place to get some advice. Its a 1991 L98, stock. I've looked at all the Bosch Platinums, but have heard mixed stories about them, has anyone out there tried the AC Delco Platinum plugs??
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Old May 15, 2006 | 12:29 AM
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as long as it throws a good spark, it really can't get any better or worse...any new plug will be able to fire all that a stock L98 will need.

for heavy forced induction, NGK's really can't be beat (so i hear) - that's what i ran in my talon TSi AWD at 25psi with 660cc injectors and had no issues on stock ignition with 8.5mm wires
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Old May 15, 2006 | 12:41 AM
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NGK is all I use in all my vehicles.
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Old May 15, 2006 | 07:39 AM
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Originally Posted by RRT vette
NGK is all I use in all my vehicles.
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Old May 15, 2006 | 08:18 AM
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Originally Posted by Jansenwins

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Old May 15, 2006 | 09:16 AM
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NGK's are good plugs, but why spend the extra money when AC Rapidfire's are just as good.
I've tried a lot of plugs, and for my money, the AC plugs work the best in a L98.
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Old May 15, 2006 | 10:51 AM
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I run NGK's in mine, too.
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Old May 15, 2006 | 11:36 AM
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NGKs here too...
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Old May 15, 2006 | 11:54 AM
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Just bought NGK for my '86 and they are less than the AC.
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Old May 15, 2006 | 12:16 PM
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Seems like I'm the odd ball...give me ACDelcos anytime, if I can't have them, then it would be NGKs.
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Old May 15, 2006 | 12:58 PM
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Yet another vote for NGK, but spark plugs are just like any other subjective battle. One person will say NGK, another AC, and somebody else will say Autolite. Some people become Chevy fans because they had a Ford or Mopar that died on them, and that can go the other way also.

Take care,

Adam.
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Old May 15, 2006 | 01:43 PM
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Seems like if I go with AC's or NGK's then i'll be alright.
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Old May 15, 2006 | 05:22 PM
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I run NGKs in every one of my Vettes. Some people like the iridium and platinum but I run the copper ones. The next time around I may switch over to the platinum ones.
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Old May 15, 2006 | 08:22 PM
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I had Bosch Platinum 4 plugs and my car was less responsive. I took them out 3 months later and returned them for my money back. I took my old AC delcos that I had and tried the cut-back method with my trusty Dremil for the heck of it. That was 7 months ago. Still runs great but I want to put new set back in.
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Old May 15, 2006 | 08:32 PM
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Rapid fires here...
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Old May 15, 2006 | 09:52 PM
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Originally Posted by cdnguyred88
Rapid fires here...
Same here.
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Old May 15, 2006 | 10:25 PM
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Originally Posted by rick lambert
Seems like I'm the odd ball...give me ACDelcos anytime, if I can't have them, then it would be NGKs.
nope, i agree with you
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Old May 15, 2006 | 10:27 PM
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Beru Silvers
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