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Cobra Forums
2013-14 Shelby GT500
Race tune advice
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<blockquote data-quote="STTOCK" data-source="post: 15105254" data-attributes="member: 165608"><p>E85 has the octane properties of 105 when tuned for. But requires more fueling. Aka larger injectors + BAP or return style fueling. E85 was a no brainer for me because of the price and ease of getting it compared to race fuels. With 93 you will run out of octane at 18psi. </p><p></p><p>With E85 the stoich you know with gasoline (14.7:1 or 14.3:1 depending on ethanol content) becomes a little confusing. It's stoich is 9.8:1. Hence the need for more fueling.</p><p></p><p>I switched between 93 and E85 every few tanks due to the corrosive nature of E85. Have had no problems. 5k+ miles.</p><p></p><p>Just my .02, hope it helps. Good luck.</p></blockquote><p></p>
[QUOTE="STTOCK, post: 15105254, member: 165608"] E85 has the octane properties of 105 when tuned for. But requires more fueling. Aka larger injectors + BAP or return style fueling. E85 was a no brainer for me because of the price and ease of getting it compared to race fuels. With 93 you will run out of octane at 18psi. With E85 the stoich you know with gasoline (14.7:1 or 14.3:1 depending on ethanol content) becomes a little confusing. It's stoich is 9.8:1. Hence the need for more fueling. I switched between 93 and E85 every few tanks due to the corrosive nature of E85. Have had no problems. 5k+ miles. Just my .02, hope it helps. Good luck. [/QUOTE]
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2013-14 Shelby GT500
Race tune advice
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