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Plugs for e85 NA motor

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Old 09-19-2012, 08:21 PM
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Default Plugs for e85 NA motor

I want to tune my now stockish ls1 for e85. Eventually I want high compression heads to take full advantage for the higher octane but that will have to wait.

Now I see many people run NGK 55 ( I think that was the plug) in most of their cars the way it is, and e85 needs a warmer plug, so ngk6 would be out of the question.

If I do a tune up here soon, would i be fine getting the 55's for running 93 and eventually e85?


If I am understanding everything correctly I am reading I should be fine just want to throw it out there incase I read something wrong.
Old 09-19-2012, 09:39 PM
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I was fine with 6's when I was stil on the stock stuff. But i had no difference going to 7's

Now with the setup in my sig I run 8's, I got knock with the 6's
Old 09-20-2012, 04:15 PM
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Originally Posted by Grr
I was fine with 6's when I was stil on the stock stuff. But i had no difference going to 7's

Now with the setup in my sig I run 8's, I got knock with the 6's
Was that on stock stuff running e85?

I think I may go ahead and order the 6's with my headers for now, not to expensive to replace if I have to later. Plus its hard to say when I will get to that e85 point

Also, you care if sometime I pm you with e85 questions. Probably wont be for awhile
Old 09-20-2012, 08:40 PM
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go ahead, and yes that was bolt ons only on E85. TR6 is a good plug but when i got all this compression i had to go to a non-projected 8. look forward to hearing from you
Old 09-20-2012, 09:07 PM
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hey i got this ? in a different thread, but thought would ask you quick. Did you do your own tuning? and if so which wideband did you get?
Old 09-21-2012, 07:38 AM
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yes I do my own, I have had 4 different ones. AEM, LC1, LM1, 14point7,
I have a LC1 and XD16 guage because they are very cheap on ebay



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