Banks OTTOMIND Programmer Excursion V10 - using gas with different octane levels?
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Banks OTTOMIND Programmer Excursion V10 - using gas with different octane levels?
I just had a Banks PowerPack performance kit installed on my 2004 X V10 4x4, including Banks cold air intake, headers, y-pipe and the OTTOMIND PROGRAMMER.
I live overseas where the gas standard octane level is 95 (the highest available in my country, Germany, is "Aral Ultimate" 102). The shop programmed my Ottomind on 91 gas. They told me that using 91 and higher is no problem but using lower than 91 (e.g., 87 like in the US) would require re-programming of the Ottomind.
My question is what would happen if I drove my V10 Excursion on 87 gas with the Ottomind programmed on 91 gas? Is there a risk of damaging the engine? Would perfomance/acceleration suffer?
I live overseas where the gas standard octane level is 95 (the highest available in my country, Germany, is "Aral Ultimate" 102). The shop programmed my Ottomind on 91 gas. They told me that using 91 and higher is no problem but using lower than 91 (e.g., 87 like in the US) would require re-programming of the Ottomind.
My question is what would happen if I drove my V10 Excursion on 87 gas with the Ottomind programmed on 91 gas? Is there a risk of damaging the engine? Would perfomance/acceleration suffer?
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Joined: Mar 2010
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From: West Virginia
It would almost certainly result in detonation/pre ignition and that eventually would damage your engine in the form of burned rings/grooves, blown geadgasket, burned valves, and possibly a broken crank or rod, depending on what the weak spots are in the v10 rotating assembly.
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It would almost certainly result in detonation/pre ignition and that eventually would damage your engine in the form of burned rings/grooves, blown geadgasket, burned valves, and possibly a broken crank or rod, depending on what the weak spots are in the v10 rotating assembly.
thanks a lot for your quick reply!
did I understand you correctly that using lower than the programmed octane level may result in the issues/damages you described? or is that when using higher than the programmed octane level?
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The higher the octane, the slower, more stable the burn is for the fuel, so timing, fuel mapping, compression etc can be increased and more performance can be squeezed from an engine.
The lower the octane, the less stable the fuel and the burn is when compared to a higher octane.
The stability and the faster burn is what allows the fuel to pre-detonate when you have a custom tune set up for a higher octane.
That's also why in older vehicles that have pinging issues when climbing hills and whatnot, going to a higher octane fuel can sometimes cure the pinging.
Stewart
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Correct. You understood him correctly.
The higher the octane, the slower, more stable the burn is for the fuel, so timing, fuel mapping, compression etc can be increased and more performance can be squeezed from an engine.
The lower the octane, the less stable the fuel and the burn is when compared to a higher octane.
The stability and the faster burn is what allows the fuel to pre-detonate when you have a custom tune set up for a higher octane.
That's also why in older vehicles that have pinging issues when climbing hills and whatnot, going to a higher octane fuel can sometimes cure the pinging.
Stewart
The higher the octane, the slower, more stable the burn is for the fuel, so timing, fuel mapping, compression etc can be increased and more performance can be squeezed from an engine.
The lower the octane, the less stable the fuel and the burn is when compared to a higher octane.
The stability and the faster burn is what allows the fuel to pre-detonate when you have a custom tune set up for a higher octane.
That's also why in older vehicles that have pinging issues when climbing hills and whatnot, going to a higher octane fuel can sometimes cure the pinging.
Stewart
Thanks a lot for this clarification! So, the key message is I should not worry using 91 gas and higher.
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