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How much tuning can effect fuel economy?

Old Dec 16, 2012 | 09:58 PM
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How much tuning can effect fuel economy?

Question, what is your personal fuel economy like for your Evo X after being tuned?

Just curious on what it will be like. Does it drastically change MPG?
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Old Dec 16, 2012 | 10:24 PM
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It can. Depends on several factors but, usually mpg will improve a bit, as you'll be tuned a bit leaner. We have a few different maps for different tracks and exhausts and, as the AFR changes a bit with these tunes, so does the burn rate.
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Old Dec 17, 2012 | 07:17 AM
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Pre-tune / post-tune my mixed driving average is only changed by .5-1mpg

However, when my X was new and untuned I would see city around 15-16mpg and now I see 17-18 more frequently.
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Old Dec 17, 2012 | 07:59 AM
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I get 21mpg city driving normal. 26mpg highway after my tune
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Old Dec 17, 2012 | 12:13 PM
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Depends on how much the tune changes, but generally people see better mileage.

It changes more for 08 users since their stock tune was less optimized for mileage.

My 2012 rom almost looked tuned already at first glance. The 0-100 load area is already quite dialed in with regards to fuel economy.

Those same changes on the 08 would show some gain.
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Old Dec 17, 2012 | 04:03 PM
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Usually 2-3. If you have an 2008 maybe even 5.
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Old Dec 17, 2012 | 04:50 PM
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Originally Posted by ugakirk
Usually 2-3. If you have an 2008 maybe even 5.
MPG from my stock tune vs Pro tune was about 4 mpg... favoring the Pro tune map. I was using an mobile application, forgot what it was called, to get true MPG... But I drove like a grandma, not fun. MPGs on our cars are still pretty Sh**ty

Last time I spoke to my tuner, you can run 2 maps... one "perfomance map" and "economy map". How much more economical, I have no idea. Is it worth it?! Tuning fees, Time, etc. vs Gas savings... You can probably get your ROI after a couple of years

Last edited by flipflop; Dec 21, 2012 at 05:48 PM.
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Old Dec 18, 2012 | 10:10 AM
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have to keep your foot out of it for economy. I didn't buy an evo for the gas mileage though. get a DD


Posted from Evolutionm.net App for Android
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Old Dec 18, 2012 | 10:49 AM
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Originally Posted by GsrJake
I get 21mpg city driving normal. 26mpg highway after my tune
What? Surely you jest...

Either that, or you drive like a Chinese 80 year-old...
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Old Dec 18, 2012 | 12:17 PM
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Originally Posted by acm_evo
What? Surely you jest...

Either that, or you drive like a Chinese 80 year-old...
Lol I can't believe this. I shift at 3k when I'm just driving normally..stay out of boost and don't get 21 in the city. You must be grannying more than I am
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Old Dec 18, 2012 | 12:36 PM
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My MPG has stayed practically the same all the way from new to modified. I generally average 18-20 MPG in my daily mixed driving, and 22-26 MPG on the highway depending on speed.

Stock or modified, the best way to save gas is stay out of boost, but what fun is that
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Old Dec 18, 2012 | 04:16 PM
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Keeping it light on the gas pedal is key with every car, a lot of people forget this is a 3500-3600lbs car plus driver, fluids.

This might sound silly but I have done this with all my previous cars. I never fill up past 1/2 of the tank. Its less weight you lug around and fuel is heavy. Granted you need to stop at the pump more often, I don't mind.

The fuel economy is right on the button (AWD, turbo, heavy car). Another thing I do is I throw it into neutral every chance I get when going down a longer steady hill, that I know it is safe to not be in a gear.

Did that with my 1g and 2g dsm and it worked very well. Also be mindful of how much the engine is struggling. Use the gearing to its advantage, for ex. if you floor it in 5th and you are doing 20, you are not going to go anywhere but the ecu will be injecting 100% fuel it can at that point. In 3rd you will only need 25% throttle briefly, sure the higher RPM offsets some of the gains but it works.
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Old Dec 18, 2012 | 10:43 PM
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Pre-tune I usually get around 17 city/21 hwy, maybe about .5-1 mpg better after tune.
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Old Dec 18, 2012 | 10:52 PM
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Originally Posted by CrossRifles
Question, what is your personal fuel economy like for your Evo X after being tuned?

Just curious on what it will be like. Does it drastically change MPG?
thats what I'd like to know
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