love67

iTrader: (7)

Hi,
I was wondering how much will my MPG improve if i ask my tuner to tune a "gas saving map" for street use? will this "map" do better than stock map or is this even doable?

xhomm02

Well, it is possible via timing/MIVEC/WGDC changes, but do not expect miracles, 5-10% saving is possible.

Wrex1977

You'd probably be better off to drive slower and shift earlier.

tipoytm

There's a cruise mod by Hiboost that I've used for over a year now. Just search for the thread. I probably saved 2-3 mpg on highway cruising.

love67

iTrader: (7)

im driving slow and shift so early already...but because my tune the MPG went soo low...
just wondering what is the MPG r u guy able to get? i only have 16-17 MPG with freeway....

Robevo RS

iTrader: (16)

there is such a thing as a gas saving map or transit map in rally, but you need a proper ecu for that , so you can switch between maps. Actually there is 3 different map rally guys using. Race - test - transit/gas savings

Probably you will able to do that with Cobb., not as simple as the rally cars but still.

RazorLab

iTrader: (8)

You can switch maps with the stock OEM ECU while the car is running, so owners already have a "proper" Ecu.

droppinbottom

iTrader: (5)

Then something is terribly wrong. Are you running in open loop all the time?

JEP

iTrader: (2)

16 to 18 is all I get also...

droppinbottom

iTrader: (5)

I get that around town but definitly better on the highway. And my data is from hand figuring it not by the dash display.

Robevo RS

iTrader: (16)

Why nobody tunes two maps for the evo then, like one for race and one for DD?
I think that would be something people would pay extra money. For many reasons, besides the gas savings.
I am around Evo tuners and so, at least in the states 8 years now, and i never heard of this on OEM ECU. But at least i know now, this is possible too
It is an awesome thing to have two maps, does anyone have that type a tune currently?
How do you switch maps, with a button like the other ECU's do, the cruise control switch or similar?

thanks for the info .

love67

iTrader: (7)

^^ Evo X has that...
"EVO X Dyno Tuning for Dual Maps.

Your stock GSR ECU can be programmed to store two maps that you can switch between at will. This feature can also be used as a fail safe for water/methanol injection systems. The maps are switched using the cruise control switch. The cruise control still continues to work normally." copied from road race Engineering...
I already e-mailed my tuner(from road race engineering), now just waiting for his reply and see how much better could it work...because now the gas price is really killing me...im about 3-4 days per tank...

dj_rock101

I easily get around 18-19 in the city and 24-25 on the freeway. The key is not only to shift early, but let the car decelerate on its own without mashing the brake pedal a lot. Just get a normal tune and you'll see a bump in the fuel economy since stock X runs super rich.

disturbedfan121

iTrader: (3)

just need the tuner to lean afr's out a bit while not in boost and when the car enters boost it would richen up. i had a map on my miata that made 250whp and still netted me 30+mpg my best rating was 36mpg, but it was rwd and only 2300lbs so its not an apples:apples comparison, but still it can be done, maybe not 30mpg, but upper 20's sure.

BakaUnchi

I have 29 mpg evo X maps ;-p