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Ignition Compensation on E85

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Old 06-11-2018, 08:03 AM
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2x0
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Default Ignition Compensation on E85

I was looking at my ignition compensation tables and I think I see why my car feels like a turd when it gets really hot. For example sometimes cruising around town my IAT will get up in the 140's, and my ECT will get up to 200-205. At this point the stock ignition tables are retarding my timing like 5° when combined. I understand this is for detonation safety on gasoline.

Question is with E85 can I reduce the amount of ignition retard somewhat with these IAT and ECT levels more safely? Car loses a ton of power currently in these conditions. What is everyone else using for these values?
Old 06-15-2018, 07:47 PM
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Default Re: Ignition Compensation on E85

Isn't that the huge benefit of running e85; virtually no risk of det?
Old 06-15-2018, 08:44 PM
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Default Re: Ignition Compensation on E85

Yeah, I backed down my temperature related timing retard A LOT, and have been driving around on hot days doing pulls with no issue. Drives much better now.
Old 06-16-2018, 05:09 AM
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Default Re: Ignition Compensation on E85

Sweet deal! From what I have been reading up, that seems to be the main reason E85 is a good move. You may use more to get to a comparable power level vs gasoline, but the det risk is nearly nonexistent, removing knock limitations. I'm sure you're well aware of the benefits though lol. I'm compiling my head rebuild and am looking to switch when I complete that.
Old 06-16-2018, 07:11 AM
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Default Re: Ignition Compensation on E85

Originally Posted by Txdragon
Sweet deal! From what I have been reading up, that seems to be the main reason E85 is a good move. You may use more to get to a comparable power level vs gasoline, but the det risk is nearly nonexistent, removing knock limitations. I'm sure you're well aware of the benefits though lol. I'm compiling my head rebuild and am looking to switch when I complete that.
Yep, it’s pretty awesome. Problem is I had to rebuild my calibrations from a stock map basically, so I am still finding little areas that are not set up ideally for e85. Such as all the different variables that causes it to pull timing

Its getting there, slowly but surely.
Old 06-16-2018, 08:19 AM
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Default Re: Ignition Compensation on E85

Originally Posted by 2x0


Yep, it’s pretty awesome. Problem is I had to rebuild my calibrations from a stock map basically, so I am still finding little areas that are not set up ideally for e85. Such as all the different variables that causes it to pull timing

Its getting there, slowly but surely.
You can dooo eeeeet!! Or spring for the e-tune!
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