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SVTPerformance's Chain of Restaurants
The Distillery
if i tune on real e85 will ecu adjust for e70?
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<blockquote data-quote="65fastback2+2" data-source="post: 12871092" data-attributes="member: 58051"><p>going from summer to winter e85 just makes your tune slightly rich.</p><p></p><p>you're talking about 1/2 a point or less in AFR typically which is fine.</p><p></p><p>secondly, your pcm is going to try and add/remove fuel to achieve commanded AFR...if it wasnt, then you could remove all 02 sensors, but everyone knows you cant do that.</p><p></p><p>thirdly, over 60% ethanol, the returns on the benefits are vastly diminishing...and you wont see less than e70 out of a pump anyhow.</p><p></p><p>so, if it was my vehicle, I tune it on summer e85, then forget it and drive the mess outta the thing year round.</p><p></p><p>my 500 rwhp lightning was tuned on winter e85, and I just let it go slightly lean. beat on it year around as well.</p></blockquote><p></p>
[QUOTE="65fastback2+2, post: 12871092, member: 58051"] going from summer to winter e85 just makes your tune slightly rich. you're talking about 1/2 a point or less in AFR typically which is fine. secondly, your pcm is going to try and add/remove fuel to achieve commanded AFR...if it wasnt, then you could remove all 02 sensors, but everyone knows you cant do that. thirdly, over 60% ethanol, the returns on the benefits are vastly diminishing...and you wont see less than e70 out of a pump anyhow. so, if it was my vehicle, I tune it on summer e85, then forget it and drive the mess outta the thing year round. my 500 rwhp lightning was tuned on winter e85, and I just let it go slightly lean. beat on it year around as well. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Distillery
if i tune on real e85 will ecu adjust for e70?
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