Lower Grill Block 2005 Honda Civic
I finally received my Scanguage yesterday, so I decided to run an experiment on a lower grill block. I drove 8-mile runs on Highway 16 from Hartland (H) to Oconomowoc (O), WI and then back.
Here are the results (average mpg) in the order in which they occurred: With grill block (cruise set on 52 mph): H to O: 46.2 mpg O to H: 45.9 mpg Without grill block (cruise set to 52 mph): H to O: 44.9 mpg O to H: 44.9 mpg Without grill block (cruise set to 51 mph): H to O: 45.0 mpg O to H: 46.0 mpg (see notes on this stat below, underlined) With grill block (cruise set to 51 mph): H to O 46.2 O to H 46.2 A couple of notes: The grill block consisted of layers of packing tape, so it was not flush with the bumper. The stats on the Scanguage were reset at the same specific points (road signs) at the beginning of each run. Resulting stats were recorded at the same specific points (road signs) at the end of each run. The car was up to speed and set on cruise at least a quarter of a mile before the beginning of each run. The road was slightly wet, but there was no rain or puddles. I did not use the wipers. Weather: Temp: 38 degrees F UV Index: 0 Low Wind: From WNW at 4 mph Humidity: 96% Pressure: 29.45 in. Dew Point: 37°F Visibility: 8.0 miles This experiment took place between 2:00 AM and 4:00 AM CST. I stayed in the right lane at all times. I kept the radio and fan off, so the headlights were the only device I had on. I was passed by only one car on each run, going in each direction. The exception was the last run without a grill block (O to H: 46.0 mpg), when a semi passed in front of me for the last 60 seconds of the run, most likely providing improved stats due to drafting. There were no other modifications to the exterior of the car, including the upper grill. |
Good stuff! So a LGB (new acronym) is worth 2.5%...at low temps and high humidity :p
2-4am...and you didn't get pulled over for driving erratically? You: "I'm doing a fuel economy experiment" Officer: Pulls you out of the car, drunk test, checks car for drugs, calls for backup :rolleyes: |
That road has officers all over it at that time of night. I was followed a couple of times. I did intend to use that excuse, plus point out that my bumper was covered with several layers of tape.
Oh well, there's always next time..... :) |
good test Arminius.
Could you post some pictures of your car and your aero mods? |
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no problem.
You use the foam spray for fill the back bumper, I am interesting at your experience |
It's always nice to see a little testing in action, :)
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Like I said before, all the changes I make must be unnoticeable to my wife, since this will be her car in the future. If/when I do use the foam, it will be way in the back, only, so that she can't see it. I will also paint it the color of the car so that it doesn't stand out. |
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One more thing: I'm making a sign for my back window that says, "Efficiency Testing / Ecomodder.com" so the cops don't pull me over for going too slow.
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Well I tried to test the back bumper this morning. I filled the bumper with cardboard and "secured" it with tape. The problem is that I could not get the tape to hold to the underside of the car, so the cardboard kept falling off. I'm going to fill the bumper (and more) with foam tonight, unless something goes wrong. I will put the information concerning the modification on my car's EMGarage info, but I will not be able to test its "before and after" efficiency. After looking under the car this morning, I realized how many openings there are that can be covered and smoothed over. Honda made great improvments on the smoothness of the underbody of this model of Civic compared to previous models, but I think this should help at least as much as the grill block. At least I'm hoping........ |
Well I tried to test the back bumper this morning. I filled the bumper with cardboard and "secured" it with tape. The problem is that I could not get the tape to hold to the underside of the car, so the cardboard kept falling off. I'm going to fill the bumper (and more) with foam tonight, unless something goes wrong. I will put the information concerning the modification on my car's EMGarage info, but I will not be able to test its "before and after" efficiency.
After looking under the car this morning, I realized how many openings there are that can be covered and smoothed over. Honda made great improvments on the smoothness of the underbody of this model of Civic compared to previous models, but I think this should help at least as much as the grill block. At least I'm hoping........[/QUOTE] Hey post some pics! :thumbup: of all espescially the back. Pleeasse:D |
Great numbers any pictures of the grill?
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