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The Terminator
Engine/Tuning
Whipple 2.9 gen 3 install.
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<blockquote data-quote="c6zhombre" data-source="post: 16186814" data-attributes="member: 76381"><p>There is no issue having two tunes and swapping fuel types at a gas station if you have to. Just run the tank down as far as you can, fill up with the new fuel, drop in the tune, drive away. If you were on the E85 tune and are making the switch to E10 gas....you will run ever slightly lean for that tank because of the residual 85% ethanol. If you were on the E10 gas tune and make the switch to E85....you will run ever slightly rich for that tank. It should be minuscule a/f difference if you have run the tank down to reserve. I've done this several times over the past 7 years. I'm sure if you wanted to get very specific about it.....you could have adjusted tunes for those "swap over" tanks and begin flogging WOT immediately. Otherwise, just take it easy, there won't be a problem. That 2nd full tank let her rip like normal.</p></blockquote><p></p>
[QUOTE="c6zhombre, post: 16186814, member: 76381"] There is no issue having two tunes and swapping fuel types at a gas station if you have to. Just run the tank down as far as you can, fill up with the new fuel, drop in the tune, drive away. If you were on the E85 tune and are making the switch to E10 gas....you will run ever slightly lean for that tank because of the residual 85% ethanol. If you were on the E10 gas tune and make the switch to E85....you will run ever slightly rich for that tank. It should be minuscule a/f difference if you have run the tank down to reserve. I've done this several times over the past 7 years. I'm sure if you wanted to get very specific about it.....you could have adjusted tunes for those "swap over" tanks and begin flogging WOT immediately. Otherwise, just take it easy, there won't be a problem. That 2nd full tank let her rip like normal. [/QUOTE]
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Whipple 2.9 gen 3 install.
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