E85 mix?

[steelgiant5]

The ecu recognizes the lack of knock and adds timing on its own


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[StealBlueSho]

The ecu recognizes the lack of knock and adds timing on its own


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Right, upto a certain extent... That's where LOR/OAR ratios come into play.. stock the OAR(octane adjust ratio) moves as close to -1 as it can based on feedback from the knock sensor... It's scales spark accordingly.. it's one way the car keeps itself healthy... if it gets constant knock retard it will raise the OAR which reduces the amount of spark...but there has to be a table with predefined limits on how much additional spark the ecu will add.

Mine sits at -.96 .... Maybe adding the E will get it to move to -1... Maybe a half degree of spark? Maybe 1 full degree? I'm planning on testing it out.

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[steelgiant5]

-.96 is pegged... that's what I am at with e20


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[steelgiant5]

Even on factory tune e20 mix will make a difference. On my gas cap thing it says e15 is ok


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[StealBlueSho]

-.96 is pegged... that's what I am at with e20


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You tuned for E20? or are you running a 93 octane tune and adding corn?

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[steelgiant5]

Tuned for it ajp style
And unleashed


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[StealBlueSho]

Yea, your tuned for that little extra corn. Bradley is a good guy. You do the wastegate mod yet?

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[steelgiant5]

Yea, your tuned for that little extra corn. Bradley is a good guy. You do the wastegate mod yet?

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Thinking about it, looking for a used wastegate first, before I buy new


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[yo tony]

Thinking about it, looking for a used wastegate first, before I buy new


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What is this wastegate mod you speak of

 

[StealBlueSho]

What is this wastegate mod you speak of

http://www.ecoboostperformanceforum.com/index.php?topic=6526.0

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[StealBlueSho]

Hahaha. You also have a point.
But you're right. Trying it is the best way to prove my point.

Yup, loaded up on E20 today... gonna give it some time to see if OAR adjusts for it... then datalog to see if there is any hard evidence of this doing anything for you without being tuned for it...

One of the side benefits of E85 is a cooler charge from what I am reading... not sure how much cooler a charge E20 vs E10... but could play a factor as well..

 

[OmaHahn]

Right, upto a certain extent... That's where LOR/OAR ratios come into play.. stock the OAR(octane adjust ratio) moves as close to -1 as it can based on feedback from the knock sensor... It's scales spark accordingly.. it's one way the car keeps itself healthy... if it gets constant knock retard it will raise the OAR which reduces the amount of spark...but there has to be a table with predefined limits on how much additional spark the ecu will add.

Mine sits at -.96 .... Maybe adding the E will get it to move to -1... Maybe a half degree of spark? Maybe 1 full degree? I'm planning on testing it out.

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And if you don't care about knock or want to disable this, get an SSI tune and then hold your breath! What? Did I just open a can of worms with that??

 

[StealBlueSho]

And if you don't care about knock or want to disable this, get an SSI tune and then hold your breath! What? Did I just open a can of worms with that??

Why would you disable LOR/OAR? That would seem to me to be a great way to protect against bad gas...

Although the knock sensor should retard timing on its own upto a point... If you have constant knock then the OAR starts to rise so spark gets scaled back as a whole... Or least thats what I have been informed, read, seen...

Why stir the ***...lol

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[2012korn]

This isn't Facebook. No one cares about ssi here lol

 

[StealBlueSho]

So after E20 and some data logging I see no increase in spark... nothing that would indicate an increase in power. I still need to datalog some temps to see if the E20 is giving any additional cooling effects... Otherwise the only change I see is a small hit to my fuel pressure which I expected...

I think I am sticking with my theory until I can find some concrete evidence... If you are not having any knock issues running a 93 tune... Mixing E20 without tuning for it is not going to net you anything noticeable...

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[steelgiant5]

So after E20 and some data logging I see no increase in spark... nothing that would indicate an increase in power. I still need to datalog some temps to see if the E20 is giving any additional cooling effects... Otherwise the only change I see is a small hit to my fuel pressure which I expected...

I think I am sticking with my theory until I can find some concrete evidence... If you are not having any knock issues running a 93 tune... Mixing E20 without tuning for it is not going to net you anything noticeable...

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Really? I swear this has already been proven.. you are running stock tune correct?


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[StealBlueSho]

I have several tunes... But I decided to test using the LMS 4+X tune which is one of the conservative tunes I run.

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[steelgiant5]

Oh, what I saw was e20 on stock tune..


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[2013blacksho]

Well we will see what 5.2 gals does with and 12 of 89 octane. Next time I'll watch the pump better!! LOL

 

[StealBlueSho]

Yea, when I mixed, I went inside and prepaid for the amount I need so that does t happen LOL. Good luck!

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