Quote:
Originally Posted by UltArc
I spend some time over at Mustang Evolution and Insight Central, and the opinion I have formed is that ECO modes aren't always the best for economy, and PERFORMANCE tunes often help fuel economy.
In Mustangs, people on the forum often just drive the same. They put the tune on, and nothing else changes- maybe they have more fun. Of course there is ZERO testing done whatsoever, but many people note it. True, this is not a fact or established empirically, but often the only difference people notice is more miles per gallon/tank, and improved performance.
People who actively and carefully drive Insights (gen 2s), often mention they get better mileage when driving in Sport mode rather than eco. I think about how the majority of people drive an eco minded car- Prii, Insights, so on. They drive it like an ON/OFF switch, and just think it will get great mileage because they bought that car. So smashing down the pedal in Performance mode vs Eco mode will most likely show better mileage in Eco, but I imagine whatever is done to the computer will help the overall performance (read: more efficient) in Sport mode if driven appropriately.
I am not saying that the fuel economy tune is bad, or to get the most aggressive racing tune, but just offering my experience on why it may be a good idea to try different tunes, and maybe do some testing for the rest of us  |
Yeah I've read the same thing too. I have 3 tunes coming; the fuel economy 87 octane, a performance 87 octane, then a performance 93 octane with harsh shift that will be strictly racing usage. I figured I'd start with the fuel economy since it may have earlier converter lockup, then test out the performance 87 and see if anything changes. After that I'll stick with whichever works best
I wish I knew how to tune that way I could set a super lean AFR for fuel economy while sacrificing some power. I mean I already run 12.8@110 so a 13.0 wouldn't hurt much