E85 Tune with stock manifolds

[JoeCee]

Has anyone had 02 sensor issues with e85 tune while using stock manifolds? I know people have issues with the non-angled o2s with long tubes.

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[Zrussian13]

Ran e85 and stock manifolds for over 40k with no issues. Spent the last 50k running boostane through it turboed and still no issues with the stock o2s. Over 98k miles now and I'm still running the o2s from the factory.

 

[ZeroTX]

What kind of power can you make with a naturally aspirated Gen3 Coyote through stock manifolds/cats on E85? Is there such thing as a flex tune? What if you're on a road trip and no E85 is available?

 

[engineermike]

Is there such thing as a flex tune?

Absolutely and it works especially well on the gen3. Unlike the gen2, the gen3 has the ability to float spark timing, max engine load, and dozens of other parameters as a function of learned ethanol. Now, whether your tuner will do it or not is another story.

 

[robvas]

What kind of power can you make with a naturally aspirated Gen3 Coyote through stock manifolds/cats on E85? Is there such thing as a flex tune? What if you're on a road trip and no E85 is available?

Then you fill up with 93 and switch back to your 93 tune

 

[ZeroTX]

Then you fill up with 93 and switch back to your 93 tune

Isn't that risky mid-trip? Brick the ECM and you're 700 miles from home... Then what.

 

[robvas]

Isn't that risky mid-trip? Brick the ECM and you're 700 miles from home... Then what.

Not sure how often that happens. If you're going on a road trip I guess you will know ahead of time so switch fuels before you leave

 

[junits15]

If you go on a long road trip it would be prudent to not start on an ethanol only tune.

And you do not need special manifolds for e85, the stock O2 sensors and manifolds are not susceptible to any damage from e85.

 

[WildHorse]

what manifolds ?
You drive a f-150 ?

 

[HKusp]

It's pretty much IMPOSSIBLE to brick the PCM on these cars. @Rolls at PCMtec tried and they couldn't do it.

 

[I Bleed Ford Blue]

I think he meant having something go sideways while your loading the tune and you end up with a no start/no run condition, not permanently damaging the PCM beyond repair.

To the OP, if your going on a long road trip, switch over to your 93 tune before you leave home, that way if something does happen, you're at home, not 200 miles from nowhere.

 

[Pistol_91]

If your going on a long road trip, switch over to your 93 tune before you leave home, that way if something does happen, you're at home, not 200 miles from nowhere.

This type of thing used to be called common sense years ago.

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