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

What spark plug

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Old Dec 11, 2011 | 05:57 PM
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Default What spark plug
What rapid fire plug is best for a lt4 with only a hot cam and high flow cats. #12,#14 or what?
Thanks
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Old Dec 11, 2011 | 06:13 PM
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This may not answer your question. But, I've had good luck/performance with NGK TR55's.
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Old Dec 11, 2011 | 10:14 PM
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Keep in mind all a spark plug does in create an arc to fire the fuel to air mixture. Performance plugs are snake oil. I've run the NGK TR55's in my LT1 a couple of years ago. I have a set of Autolite 606 Copper Cores in the heads I've been running over a year or so (got them a great price). The car starts and runs like it's new.
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Old Dec 12, 2011 | 12:28 PM
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Ngk tr55
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Old Dec 12, 2011 | 09:24 PM
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Guess no one runs them any more
I will have to do it the old way a few runs and ck the color
But thank you all any way!
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