Which plugs should I run with e85/350 manifold?

[Niz55]

Lund e85 tune, jlt intake, gt350 manifold,47 injectors.

Do I really need to upgrade my spark plugs or will the stock oem spark plugs work fine with my setup?



If I need to upgrade which one should I get?

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[16s550]

By e85 do you mean flex tune? Or just straight e85? If flex tune I am Interested to see if I need to change my plugs too

 

[GSLSE20B]

By e85 do you mean flex tune? Or just straight e85? If flex tune I am Interested to see if I need to change my plugs too

ive put 4500 miles on straight e90 with my lund flexfuel tune . stock plugs are fine .

 

[16s550]

ive put 4500 miles on straight e90 with my lund flexfuel tune . stock plugs are fine .

Nice. Do you always refill with flex fuel? Is there any dos and donts I should know abouthat? Just placed my order today and I'm new to this kind of tune.. feel free to pm don't want to hijack thread.

 

[Niz55]

Yes flex fuel. I thought e85 was the same as ff?

 

[16s550]

Yes flex fuel. I thought e85 was the same as ff?

Lund told me it's not. They told me to be sure when I did get a tune to make sure I specified flex fuel not straight e85.

 

[TheDivaDanielle]

they could tune it to run very tightly on just e85 and only e85, but the vast majority of us are going to use the available flex fuel option

 

[2morrow]

I asked the same thing of my tuner as I have very similar mods to you and they suggested to keep the stock plugs. If you were to upgrade to FI that would be a different story.

 

[AZ18yote]

Yes flex fuel. I thought e85 was the same as ff?

They offer an e85r tune. Meant for straight e85 no other fuel. Brings in timing much faster. Stronger mid range. The flex allows to switch back and forth between fuels on the same tune.

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