E-85 Question

[BlueJay]

I’ve heard that the S550 can run e-85 without running a flex fuel kit. Is this true?
Also would a tune be required for it?

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[WildHorse]

Just a tune is needed.

 

[theslerg]

A tune is def needed. But the injectors and fuel pump can handle it from the factory.



If you ever add any forced induction, bigger injectors and a boost-a-pump or a return style fule system is needed.

 

[pt's21]

Just to be specific: The 18+ (Gen 3) Coyote can run E85 with a tune. The Gen 1 and Gen 2 Coyote need fueling upgrades.

 

[WildHorse]

Gen 2 Coyote need fueling upgrades.

Wrong.

 

[pt's21]

Okay, research proves WildHorse correct. On a completely stock Gen 2, a tune will run E85.

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