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

Which spark plug would you recommend?

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Old Jul 18, 2007 | 03:36 AM
  #21  
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Another vote for the "El Cheapo's" here...I run basic Autolite's in my vette...they are like $1.10 each...I do gap them fairly tight, .030, since I drag race the car almost exclusively...haven't had a problem in 4 years...
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Old Jul 18, 2007 | 09:44 AM
  #22  
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Originally Posted by 91sTeal
Do not use Bosch Platinums ! In my 91 they were cooked after only 100miles. I think stock Delcos are the way to go.

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Old Jul 18, 2007 | 11:08 AM
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Originally Posted by CFI-EFI

However, remember the post above...ZAP...BANG! It isn't as convoluted as some would like to make it. If different plugs cleared up a fouling problem, the plugs being replaced were probably the wrong plugs, either in configuration or at least the heat range. Think about it. What can cause fouling and what is it about a plug that could prevent or cure it? Contrary to impressions left by some, it isn't voodoo or black magic.

RACE ON!!!

i agree. if the Autolites were fouling, they were probably too cold heat range for the engine.

i also agree that spark plugs have a relatively simple function, and that exotic metals only extend useful life, and exotic designs do little of anything, but drain your wallet better...

that being said, theres nothing wrong with copper cores, and generally, the cheaper, the better, IMO.
i`ve had exellent results with Bosch supers, Autolite, Denso, and
AC Delco. you cant go wrong with any of them, so let price be major determining factor in which you pick up.

and for a little more money, the Bosch std. Platinum (not the +2/+4`s)is a great plug too.
i`ve also had plenty of good experience with them as well...
the +2/+4 types offer no real benefits, and are not worth the money, IMO...
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Old Jul 18, 2007 | 11:39 AM
  #24  
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exotic metals only extend useful life

That's why I like platinum plugs. They generally have a longer service life than standard copper-core plugs.

Even with the clamshell hood, an LT1 C4 plug/wire swap ain't no walk in the park and it's one tune-up procedure I personally don't relish.
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Old Jul 18, 2007 | 12:05 PM
  #25  
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then i would suggest conventional Bosch platinums, or Autolite platinums...
both are quite reasonable in price.

from what i`ve seen, the high buck iridiums dont last that much longer. certainly not long enough to justify their outrageous price...

Last edited by BigLee; Jul 18, 2007 at 12:07 PM.
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Old Jul 18, 2007 | 02:55 PM
  #26  
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then i would suggest conventional Bosch platinums, or Autolite platinums... both are quite reasonable in price.

That's why I like the NGK TR-55 Double Platinums. They're around $1.99 each at most auto parts stores.
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Old Jul 18, 2007 | 04:22 PM
  #27  
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Add more confusion...

I use Rapidfires in the LT4...never an issue with the operation...once a year swap.

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Old Jul 18, 2007 | 09:58 PM
  #28  
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I just found Autolite Platinums on sale at wal-mart. They are 4.17 for a pack of two with a two dollar mail in rebate per set. Thats 1.09 each. I think thats a great deal personally. They have a three year money back guarantee.
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Old Jul 18, 2007 | 10:15 PM
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Bought some Autolite 3926's today
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Old Jul 19, 2007 | 08:24 AM
  #30  
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Originally Posted by CFI-EFI

However, remember the post above...ZAP...BANG! It isn't as convoluted as some would like to make it. If different plugs cleared up a fouling problem, the plugs being replaced were probably the wrong plugs, either in configuration or at least the heat range. Think about it. What can cause fouling and what is it about a plug that could prevent or cure it? Contrary to impressions left by some, it isn't voodoo or black magic.

RACE ON!!!
I don't disagree, and again this is purely subjective. My buddy may have put a colder plug in without realizing it, that would be no surprise. The other thing is that the same heat ranges from the different manufacturers may not correlate directly, meaning that a Champion and an Autolite that line up on the cross reference chart may not be exactly the same heat range. Spark plugs are kind of like motor oil, people tend to choose their favorite according to whose marketing they like the best.
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Old Jul 19, 2007 | 10:25 AM
  #31  
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Originally Posted by Bensons86
I just found Autolite Platinums on sale at wal-mart. They are 4.17 for a pack of two with a two dollar mail in rebate per set. Thats 1.09 each. I think thats a great deal personally. They have a three year money back guarantee.
My previous plugs were Autolite Platinums and they never missed a beat. Put more than 30,000 miles on 'em and they still looked good when I swapped 'em out for the NGK's.
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