ecoboost mpgs

[mcrews]

Originally Posted by pgfpro

My little 2.0L turbo engine can go from 44mpg to 0.55mpg with about 3" of throttle pedal movement.lol

Ain't that the TRUTH!!!!

[aerostealth]

Here is the graph of all my fuel use since the truck was new on Sept 17th. I got the aerolid installed on Nov 15th so I only have two months of data of the truck naked. The goal is to determine as well as possible what the aerodynamics is doing for improved fuel economy not to set a 30 mpg run for a tank or any hypermileing stunts.

The graph shows in Red the the truck naked. I used Blue to show the winter cold weather driving period. I used Green to showcase the warmer weather driving from March on. Trips are labled. There are four dashed lines with represent composite averages of different data sets. The Purple is of the truck naked including the break in period (14.52 mpg). The Red is of the truck naked with the break in period data subtracted (16.67 mpg). The Blue is the average of the truck from new to today (17.3 mpg). The Green is of the truck with aero since Nov 15th (18.56 mpg).

If I make a statement like I achieved 30 mpg at 55 mph it is meant to be a snap shot from a read out under good conditions. By that I mean warm weather, little or no wind, and on level ground. I am not trying to make a general claim of what the truck will do as a composite average over time. For example my composite average over the last 920 miles is 18.7 mpg which is a all time high. Getting to 19 mpg in mixed driving is probably doable in warm weather and good conditions.

I currently average between 26 mpg and 29 mpg at 55 mph on level ground. I think 30 mpg would certainly be doable with a belly pan. I just do not have any long distance driving where 55 mph is the posted speed limit. I do have a trip to Deming on May 9th and a trip to Los Alamos on May 16th to check tank mpg at more or less constant speeds. If the conditions are good I may see some high returns but if windy like conditions have been through April I will not.

Trying to figure out what aero is doing in real world driving is very difficult. I am seeing a little over 10% but that is a composite average of City/Highway/Mixed. Pulling a 30 mpg average on even a pure highway trip would probably not be possible even at 55 mph with a boat tail and a belly pan. It is possible for short distances on level ground, but in the real world there will always be grade climbs, winds, traffic, etc.

I have tried to portray the truck as honestly as I can given the data I have been able to collect and to show the potential of the improvements to aero we have made. Future mods should improve the performance even more. I will try to outline that also. You all can do me a favor and stop comparing my 36 sq ft of frontal area 6K lb truck with a 365 HP engine to your Geo Metros or Diesel Jettas. It is just not germaine.

[Mustang Dave]

Originally Posted by Old Mechanic

Alfa Romeo 158/159 Alfetta - Wikipedia, the free encyclopedia

51 alfa grand prix 1.5 liter was about 2 mpg racing.

regards
mech

I can get my 4-liter Mustang into the 2 MPG range while accelerating in first gear... But I've somehow managed to keep my last 25 consecutive tank averages over 30 MPG. (>50% over EPA combined estimate)

[Arragonis]

So the summary of this is tank to tank is the only measurement worth anything ?

[aerostealth]

I would not agree with that summary at all. There are many metrics an variables. My philosophy is driving the speed limit for one thing. Hypermiler's would not agree with that normally. I live a 4 K ft which means my vehicle does 8% better than equivilant vehicles at sea level. A instant mpg read out is indicative of the work the engine is doing in a given situation so it is useful. It is indicative of potential. Unless you have good controls over what kind of trash driving enters your data stream your tank to tank mileage could be really skewed. Conversely if you do pure highway driving it can be skewed the other way.

[elhigh]

The instant readout is huge fun, regardless of everything else. Whistling up 120mpg for a mile or so is very exciting...even if I know it cannot last.

I look forward to hearing how your long trip turns out. Then is when we see how well the truck does at a steady state, bare, in moderate weather.

[wdb]

Originally Posted by elhigh

The instant readout is huge fun, regardless of everything else. Whistling up 120mpg for a mile or so is very exciting...even if I know it cannot last.

My Fit would get 'infinity' MPGs sometimes. Downhill, DFCO activated, if the hill never ended I would never burn any gas. w00t! Unrealistic, but great fun. My STi on the other hand will go from 20-ish MPG steady state to darned near gallons-per-mile with the noise pedal floored. Also w00t!

I look forward to hearing how your long trip turns out. Then is when we see how well the truck does at a steady state, bare, in moderate weather.

Ditto that. I'm rooting for Ford bigtime. The company is taking tremendous risks with their big push for lower weight and higher fuel economy in the F-Series trucks. It's a huge step, a game changer. Everyone else is chasing. Maybe some other truck will top them in MPGs or some other stat, but that will only be because Ford made that stat matter by putting it at the top of their list. Not to mention that their use of aluminum will probably bring that material into much more regular use in vehicles at all price points -- not just the luxo cruisers.

Please keep us updated!

[Daox]

Any chance we can convince you to update your fuel log on EM? Its a lot easier to view than a picture of a hand made chart.

[aerostealth]

I keep wondering what it is about a on board computer in a vehicle that can count fuel pulses for the engine and revolutions of the wheel to determine mpgs that some people don't get. It can be a excellent diagnostic tool if steps are taken to use it correctly. Yes I have seen it report 99 mpg but I don't report it as a fact. I have seen 44 mpg over a mile at 45 mph but I know it is a elevation change and I have not reported it either. The truck can get from 32 to 34 mpg at 45 mph on level ground however which is a outstanding performance given what it is. As for the fuel log at ecomodder I haven't figured out how to use it yet.

[Daox]

Click the Garage link at the top of the page. Then click on the "Fuel Log" link next to your Ford Stealth entry. Then click on "ADD another fuel log entry for this vehicle" which is right under the chart. Fill out the info, and submit! Rinse and repeat for each fill up.