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2011-2014 Mustangs
Engine/Tuning
Flex fuel tunes available for Boosted Coyotes:
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<blockquote data-quote="Shaun@AED" data-source="post: 15156726" data-attributes="member: 32381"><p>You can technically run any mixture of Gas and Ethanol and the ECU will adjust the fueling properly, however I recommend having at least 70% Ethanol when running the Race tune.</p><p>The only real benefit I can think of for this style of tune is never having to use the 'Fuel Pump' tune to drain the fuel tank when swapping fuels.</p><p></p><p>The Flex Fuel 'Race' tune would be equivalent to any E85 tune you currently have from me, however the Flex Fuel tune would be more 'refined' as ethanol blends change over the seasons.</p><p></p><p></p><p></p><p>The Flex Fuel 'Race' tune would perform identical to your current E85 tune. The Flex Fuel 'Performance' tune would be slower, but still FAR more powerful than if you were running gasoline.</p><p>All fueling requirements would be the same. IE, you would need to have a fuel system that can fuel the engine properly on E85.</p><p>Flex fuel tuning takes careful consideration with fuel trims in a certain area of the maf curve. I would require data logs on gasoline in order to ensure a proper Flex Fuel tune.</p><p></p><p></p><p></p><p>Marc is correct. I have fixed ignition timing that will not adjust with Ethanol for 2 reasons, but I'll only list the big one:</p><p>In the unlikely event an exhaust leak occurs near the O2 sensors the ECU will infer a change in Ethanol content. A lean O2 reading means Ethanol has been added to the fuel. This means an exhaust leak near the O2 sensor will cause the ECU to ADD Timing if allowed to, and if the engine is running gasoline the results on an 11:1 compression boosted engine can be disastrous, especially when we are talking about an 8-10+ degree change in ignition timing. My solution is to have a completely safe Flex Fuel tune for Gasoline or any blend of Ethanol and a 'Race' tune dialed in for Maximum power only on E70 or higher.</p></blockquote><p></p>
[QUOTE="Shaun@AED, post: 15156726, member: 32381"] You can technically run any mixture of Gas and Ethanol and the ECU will adjust the fueling properly, however I recommend having at least 70% Ethanol when running the Race tune. The only real benefit I can think of for this style of tune is never having to use the 'Fuel Pump' tune to drain the fuel tank when swapping fuels. The Flex Fuel 'Race' tune would be equivalent to any E85 tune you currently have from me, however the Flex Fuel tune would be more 'refined' as ethanol blends change over the seasons. The Flex Fuel 'Race' tune would perform identical to your current E85 tune. The Flex Fuel 'Performance' tune would be slower, but still FAR more powerful than if you were running gasoline. All fueling requirements would be the same. IE, you would need to have a fuel system that can fuel the engine properly on E85. Flex fuel tuning takes careful consideration with fuel trims in a certain area of the maf curve. I would require data logs on gasoline in order to ensure a proper Flex Fuel tune. Marc is correct. I have fixed ignition timing that will not adjust with Ethanol for 2 reasons, but I'll only list the big one: In the unlikely event an exhaust leak occurs near the O2 sensors the ECU will infer a change in Ethanol content. A lean O2 reading means Ethanol has been added to the fuel. This means an exhaust leak near the O2 sensor will cause the ECU to ADD Timing if allowed to, and if the engine is running gasoline the results on an 11:1 compression boosted engine can be disastrous, especially when we are talking about an 8-10+ degree change in ignition timing. My solution is to have a completely safe Flex Fuel tune for Gasoline or any blend of Ethanol and a 'Race' tune dialed in for Maximum power only on E70 or higher. [/QUOTE]
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Engine/Tuning
Flex fuel tunes available for Boosted Coyotes:
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