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

NGK TR55 SPARK PLUG ? Good plug ?

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Old Nov 15, 2008 | 05:55 PM
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Default NGK TR55 SPARK PLUG ? Good plug ?

I am going to replace some tired AC Delco plugs on my '94. I am looking for a good, reasonably priced, non-platinum, non-iridium plug.

Recommendations ?

NGK a good aftermarket replacement ?

TIA

MikeC4

Last edited by MikeC4; Nov 15, 2008 at 05:57 PM.
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Old Nov 15, 2008 | 06:13 PM
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They are good.
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Old Nov 15, 2008 | 08:21 PM
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PO put them on my car, and they've worked perfectly for me!
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Old Nov 15, 2008 | 10:18 PM
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It's a good plug lots of guys run them especially when running spray.
The Delco plugs get mixed reviews, I have never personally had a problem with any plug. Providing you don't try to run the for 100K miles or ten years whichever comes last just about any normal name brand plug will be fine. Why no platinum plugs need apply ? It came with platinum plugs from the general. I am not suggesting you have to stay with a platinum plug because GM put them in. GM also put 2.59 rear gears in my car from the factory and I was happy to throw them away. I have never heard an argument against platinum plugs though so curious as to why.

Last edited by JD'S WHITE 93; Nov 15, 2008 at 10:23 PM.
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Old Nov 16, 2008 | 01:54 AM
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Originally Posted by MikeC4
NGK a good aftermarket replacement ?

In the 100,000 + miles I had on my LT1 I had 2 set of plugs the ones that came with the car and a set of NGKs.
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Old Nov 16, 2008 | 11:37 AM
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I run NGK TR-55 in my 96 LT1. No problems here. A great plug. I changed my plugs about 4 months ago. It can be a pain in the *** if you have not done it before on a LT1 vette. Many people suggest taking off the inner wheel well covers for easy access to the heads, dont bother. I changed mine without removing anything but the spark plug boot. Have fun with #8, i did. Dont forget the anti-seize! Good luck
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Old Nov 16, 2008 | 11:51 AM
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I've got NGK TR55's in my '93. No problems.
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Old Nov 16, 2008 | 11:56 AM
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You should also clean as much as possible around the plug before taking them out.
Sometimes deposites (possibly metal ?) can sneak in while blind playing the new ones.
tell me how I know !
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Old Nov 16, 2008 | 12:48 PM
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Originally Posted by JD'S WHITE 93
It's a good plug lots of guys run them especially when running spray.
The Delco plugs get mixed reviews, I have never personally had a problem with any plug. Providing you don't try to run the for 100K miles or ten years whichever comes last just about any normal name brand plug will be fine. Why no platinum plugs need apply ? It came with platinum plugs from the general. I am not suggesting you have to stay with a platinum plug because GM put them in. GM also put 2.59 rear gears in my car from the factory and I was happy to throw them away. I have never heard an argument against platinum plugs though so curious as to why.

I have read too many stories about the Platinum "pucks" coming off over time. I am no plug expert, but this sounds like a process where 2 metals are "joined", and over time and extreme heat, the two can/will eventually seperate. If this happens, you are going to be left with excessive gap. Also, I don't think the premium that they charge for "platinum" or any other exotic metal that claims too have superior conduction properties is worth it...... I think alot of it is just hype so they can charge $7 per plug....not worth it in my book.

Rgds,
Mike
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Old Nov 16, 2008 | 12:55 PM
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Originally Posted by frenchyoliver
You should also clean as much as possible around the plug before taking them out.
Sometimes deposites (possibly metal ?) can sneak in while blind playing the new ones.
tell me how I know !
Thanks for the reminder......I usually blow compressed air in the plug area before I remove the old plugs....but sometimes, in haste, I forget to do this...

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Old Nov 16, 2008 | 01:01 PM
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Originally Posted by 96_vette
I run NGK TR-55 in my 96 LT1. No problems here. A great plug. I changed my plugs about 4 months ago. It can be a pain in the *** if you have not done it before on a LT1 vette. Many people suggest taking off the inner wheel well covers for easy access to the heads, dont bother. I changed mine without removing anything but the spark plug boot. Have fun with #8, i did. Dont forget the anti-seize! Good luck
Thanks! yes I have done quite a few C4 plug changes, and I always do the 'ole #8 first !!! I figure better to bloody my knuckles first and get my frustration over with quickly......after that plug is done ...it is all downhill !!!

I have this wierd way off laying my body over the engine and threading the #8 with a plug socket with built on extender. It kinda' looks like I am humping my engine ...


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