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

NGK plug cross reference for LT-4.

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Old Feb 14, 2005 | 02:27 PM
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From: Everyday you must choose between the pain of discipline and the pain of regret. Fredericktown, OH
Default NGK plug cross reference for LT-4.

OK, I lost my notes - what' the NGK plug for an LT-4?
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Old Feb 14, 2005 | 03:02 PM
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The TR55 is what everybody runs on the LT1. I imagine that would be the same.
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Old Feb 14, 2005 | 03:18 PM
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Originally Posted by Nathan Plemons
The TR55 is what everybody runs on the LT1. I imagine that would be the same.
I'm almost positive that's what I put in my LT4.
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Old Feb 14, 2005 | 03:31 PM
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http://www.ngksparkplugs.com/apps/ca...uv/results.asp

Seems like this link doesn't want to work....

this should www.ngksparkplugs.com

anyhow it is TR55 like everyone said....

Last edited by LT4BUD; Feb 14, 2005 at 03:35 PM.
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Old Feb 14, 2005 | 04:10 PM
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Originally Posted by LT-4 CE
OK, I lost my notes - what' the NGK plug for an LT-4?
I put an NGK TR6 set in my LT1. They are listed for the Mustang and Lightning SC engines but fit fine. One step colder plug than I had been using.
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Old Feb 14, 2005 | 06:19 PM
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Thanks guys.
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Old Feb 15, 2005 | 06:04 AM
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If you are interested I have a set of Denso IT20, they were in the car about 1000miles.......

They are one stage colder than the IT16 recomended for stock..
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Old Feb 17, 2005 | 06:10 PM
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Are you guys using the TR-55 V-grove (standard) or have you tried the platinum and/or iridium? I am going to stay away from platinum as I am considering spraying the car this summer.

My basic question is iridium worth nearly 5 times as much money?
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Old Feb 17, 2005 | 07:51 PM
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Default It20

Originally Posted by LT4BUD
If you are interested I have a set of Denso IT20, they were in the car about 1000miles.......

They are one stage colder than the IT16 recomended for stock..
I'm running the Denso IT20's in my 94, and they perform great.
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