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SVTPerformance's Chain of Restaurants
The Distillery
E85 life span?
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<blockquote data-quote="c6zhombre" data-source="post: 16616986" data-attributes="member: 76381"><p>It's not a linear relationship between let's say E85 or E50....E50, even as low as that sounds.....has 90% of the detonation suppression that 85% has. E50 will still allow elevated boost and timing levels and will kick the living shit out of E10 93 gas capability.</p><p></p><p>The issue that can be argued is if you are running a factory computer, and the tune is static to ethanol fluctuations....you and your tuner might decide a tune swap might be necessary if a large enough fluctuation happens at the pump. I.E. - you are originally tuned on 85% ethanol, and somewhere down the line you fill up with E50. Technically you are going to run rich in that scenario since lower ethanol % require less fuel. The opposite would happen if you were originally tuned on E50.....get a tank of 85% you will be lean. In these cases, you and the tuner might decide to drop in a tune revision. Easy enough with the handheld.</p><p></p><p>For most people, they won't ever see such wild fluctuations at their pump. For me, I test about E87 all year and every year for years now. So, even though I actually have an E70 tune in my handheld, just in case....I've never had to use it. I've been on the E87 tune for the entire time I've been doing this. But....I have the revision if need be.</p></blockquote><p></p>
[QUOTE="c6zhombre, post: 16616986, member: 76381"] It's not a linear relationship between let's say E85 or E50....E50, even as low as that sounds.....has 90% of the detonation suppression that 85% has. E50 will still allow elevated boost and timing levels and will kick the living shit out of E10 93 gas capability. The issue that can be argued is if you are running a factory computer, and the tune is static to ethanol fluctuations....you and your tuner might decide a tune swap might be necessary if a large enough fluctuation happens at the pump. I.E. - you are originally tuned on 85% ethanol, and somewhere down the line you fill up with E50. Technically you are going to run rich in that scenario since lower ethanol % require less fuel. The opposite would happen if you were originally tuned on E50.....get a tank of 85% you will be lean. In these cases, you and the tuner might decide to drop in a tune revision. Easy enough with the handheld. For most people, they won't ever see such wild fluctuations at their pump. For me, I test about E87 all year and every year for years now. So, even though I actually have an E70 tune in my handheld, just in case....I've never had to use it. I've been on the E87 tune for the entire time I've been doing this. But....I have the revision if need be. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Distillery
E85 life span?
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