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Mustang Forums
2011-2014 Mustangs
Engine/Tuning
How much timing are people seeing on e85
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<blockquote data-quote="AKDMB" data-source="post: 15298831" data-attributes="member: 162770"><p>Once you hit MBT (Max Brake Torque, timing where you make the most power, normally you can't hit it due to octane limitations, but on e85 you can) you won't make any more power even if you keep increasing timing. Power adder cars pick up so much power on e85 because they are octane limited on pump gas . Most tuners back it off when they stop picking up significant power with timing increase. There is a flex fuel MBT adder ( bumps up the spark ceiling in the tune with more ethanol content), so I don't know if the MBT timing values in the tune are actually MBT or just a general ceiling for ignition timing that they call "MBT". MBT should be a condition specific to a motor not a fuel, but idk for sure. I can't imagine taking timing much past the low thirties.</p></blockquote><p></p>
[QUOTE="AKDMB, post: 15298831, member: 162770"] Once you hit MBT (Max Brake Torque, timing where you make the most power, normally you can't hit it due to octane limitations, but on e85 you can) you won't make any more power even if you keep increasing timing. Power adder cars pick up so much power on e85 because they are octane limited on pump gas . Most tuners back it off when they stop picking up significant power with timing increase. There is a flex fuel MBT adder ( bumps up the spark ceiling in the tune with more ethanol content), so I don't know if the MBT timing values in the tune are actually MBT or just a general ceiling for ignition timing that they call "MBT". MBT should be a condition specific to a motor not a fuel, but idk for sure. I can't imagine taking timing much past the low thirties. [/QUOTE]
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Engine/Tuning
How much timing are people seeing on e85
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