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E85 tune question,

Jc12205

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2020 Ford Explorer st
#1
When getting a E85 tune do I need to upgrade fuel pump? Or do I need to modify anything?
I currently run a 93 tune from ZFG, and get 16 mpg city driving at 4.86$ a gal. And we sell E85 at 2.86$ a gal. Is E85 worth it? Any info would really appreciate it.
 

UNBROKEN

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#2
You can’t run full E85 without upgrading some stuff. You can blend up to E30 on your 93 tune.
 



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