Go Back   EcoModder Forum > EcoModding > EcoModding Central
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 09-29-2014, 09:17 PM   #1 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,700

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 50.45 mpg (US)
Thanks: 2,146
Thanked 4,932 Times in 2,478 Posts
15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed

Some of you may have seen the thread where I was hunting for a winter car to give the Firefly/Metro a break. I ended up getting a good deal on a 2007 Honda Civic LX (1.8L, 5-speed manual):



Since I got it, I've been busy ecomodding it, getting it ready to put in active duty next month.

Before I began modding, I ran a set of baseline speed vs. MPG runs (2-way averages from 70 through 100 km/h). Yesterday, I repeated the speed/MPG runs with all the mods in place (same flat test road, similar ambient temperature).

The mods:
  • Increased tire pressure
  • 6.5% taller gearing (owing to taller winter tires -- 65 vs. 55 series)
  • Reduced tire/fender gap (due to taller tires and slightly greater wheel offset)
  • 100% smooth wheel covers (coroplast)
  • Civic hybrid style decklid spoiler (CAD ... cardboard... version)
  • Civic hybrid style rear wheel spats (coro)
  • Full upper grille block
  • Partial lower grille block (with pop-out section if it gets warm)
  • Licence plate relocation (better aero than the stock bracket)
  • Daytime running lights switch (DRL's off when not needed)
  • Passenger side mirror delete
  • Driver side mirror folded (highway), with convex mirror mounted on trailing edge
  • 1 wiper delete
  • Vertical spoilers on the rear bumper corners
  • Big @$$ air dam (which scrapes now & again)


A-B test results ...

(UPDATE: the chart below has been updated with calibrated fuel consumption numbers. Original chart was based on a ScanGauge with default fuel offset settings.)




That's an average of 15.1% better MPG than stock.


Thoughts/observations ...

- Take this with an appropriately sized grain of salt. It's not a proper "good as possible" A-B-A test under the same day/conditions. I'm not planning to remove/reinstall this set of mods to do an A-B-A.

- That said, I actually ran the "B" 80 km/h pair twice (repeated it at the end), and the 2nd pair of runs produced the same numbers.

- Those MPG figures honestly seem too good to be true: with all the mods in place, the ScanGauge reported 64 mpg (US) at 80 km/h (50 mph). Unmodified, it showed 55.9 mpg at that speed. I'll just have to wait for a fill-up to calibrate the gauge and see how close to (or far from) reality it is. I'll come back and fix the graph if it turns out these numbers are way off. ... UPDATE ... calbration done and the chart above has been updated.

- Though I would think the relative/percent change should hold, regardless of whether the gauge is calibrated or not.

Coming up: I'm going to post a bunch of pics of the mods. See the project thread for some detailed pics of how some of them were made:

Project "Save the Flea!" Winter beater: 2007 Civic 1.8L, 5-speed

Attached Thumbnails
Click image for larger version

Name:	civic-3-4-and-side-after.jpg
Views:	10998
Size:	76.1 KB
ID:	15980  
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
The Following 5 Users Say Thank You to MetroMPG For This Useful Post:
2000mc (09-30-2014), aerohead (11-12-2014), Cd (11-10-2014), christofoo (10-26-2014), redpoint5 (10-23-2014)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 09-29-2014, 09:18 PM   #2 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,700

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 50.45 mpg (US)
Thanks: 2,146
Thanked 4,932 Times in 2,478 Posts
pics of some of the mods





Above: Air dam, stock (left), ecomodded (right). It's my first classic lawn edging air dam! It scrapes now and again, which tells me it's working. There's about 3.5 inches of clearance (and it scrapes regularly).



Above: went from stock alloy wheels to steelies with winter tires which are taller and fill up the wheel well more. I attached coroplast discs by zip tying coroplast bundles to the wheel rim to use as attachment points for the screws through the disc.



Above: passenger side mirror delete. I'll replace this with a much smaller exterior convex mirror (because I often back into tight parking spaces) and a larger interior one also.



Mounted a convex mirror on the trailing edge of the driver's outside mirror (for highway use).



Added hard "corners" to the rear bumper in the form of vertical spoilers to promote clean flow separation, as on many newer, aero-focused cars (e.g. Volt, Prius, Mitsu Mirage).



Copied the Civic hybrid deck lid spoiler, left. My cardboard test version is just a little bit taller than the hybrid one. I'll reproduce it in coroplast for the winter.



Also copied from the hybrid: rear wheel spats.



Above: showing the stock grille and front plate bracket (left), grille blocks & plate relocation (right). The lower block has a quick-removable section in case things get warm.
Attached Thumbnails
Click image for larger version

Name:	a-b-airdams.jpg
Views:	10663
Size:	16.2 KB
ID:	15956  Click image for larger version

Name:	a-b-mirror-convex.jpg
Views:	10498
Size:	24.7 KB
ID:	15957  Click image for larger version

Name:	a-b-vertical-spoiler.jpg
Views:	10724
Size:	32.2 KB
ID:	15958  Click image for larger version

Name:	a-b-spoiler.jpg
Views:	10557
Size:	27.5 KB
ID:	15960  Click image for larger version

Name:	a-b-rear-wheel-spat.jpg
Views:	10445
Size:	16.1 KB
ID:	15961  

Click image for larger version

Name:	a-b-grilles.jpg
Views:	10624
Size:	30.8 KB
ID:	15962  Click image for larger version

Name:	a-b-wheels.jpg
Views:	10616
Size:	29.6 KB
ID:	15963  
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
The Following 17 Users Say Thank You to MetroMPG For This Useful Post:
2000mc (09-30-2014), aerohead (11-12-2014), christofoo (01-01-2015), ECONORAM (06-18-2015), Fat Charlie (09-30-2014), Joggernot (09-30-2014), kYLEMtnCRUZr (09-30-2014), LegalShieldNden (07-05-2016), niky (09-30-2014), pgfpro (09-30-2014), pletby (10-23-2014), redpoint5 (10-23-2014), silvermazda (10-26-2014), SwamiSalami (11-16-2014), The Other Andy (10-30-2014), whatmaycome14 (12-24-2014), wmjinman (12-07-2014)
Old 09-30-2014, 01:05 AM   #3 (permalink)
herp derp Apprentice
 
Join Date: Oct 2008
Location: Lawrence, KS
Posts: 996

saturn - '99 saturn sc1
Team Saturn
90 day: 26.22 mpg (US)
Thanks: 41
Thanked 296 Times in 214 Posts
Nice mods on a nice car but I'm going to need you to go back and run an ABA on each mod, and various combinations of mods For example, I've thought that my rear wheel skirts might not have shown the improvement I'd hoped for because my rear bumpers corners have the radius of a beachball.
What can you tell me about the construction and attachment of the vertical spoilers? Is it in a hopefully permanent version, or will there be a 2.0?
Also interested to see the trunk spoiler come out of beta testing, I've considered chopping my (currently removed) spoiler down to the width of the trunk lid, but still in fear of mutilating it enough that a handmade spoiler would look better
  Reply With Quote
The Following User Says Thank You to 2000mc For This Useful Post:
Cobb (09-30-2014)
Old 09-30-2014, 06:04 AM   #4 (permalink)
Master EcoModder
 
Join Date: Aug 2010
Location: Philippines
Posts: 1,857
Thanks: 1,004
Thanked 385 Times in 274 Posts
I think it should be fine... just need to get that Scangauge calibrated. Last time I drove a 5-speed like that, I think it did around 19 km/l at 80 km/h (tank-to-tank)... but that was with some tollway traffic... so I think 20-21 km/l would be more representative of stock conditions.

Would be amazing if you really could touch near 3 l/100km with that car! Love the detail work on the decklid spoiler and bumpers!
  Reply With Quote
The Following User Says Thank You to niky For This Useful Post:
MetroMPG (09-30-2014)
Old 09-30-2014, 10:31 AM   #5 (permalink)
Rat Racer
 
Fat Charlie's Avatar
 
Join Date: May 2011
Location: Route 16
Posts: 2,940

Al the Third, year four - '13 Honda Fit Base
Team Honda
90 day: 42.9 mpg (US)
Thanks: 963
Thanked 1,102 Times in 718 Posts
Quote:
Originally Posted by MetroMPG View Post


Mounted a convex mirror on the trailing edge of the driver's outside mirror (for highway use).
Best morror mod ever.
__________________

Quote:
Originally Posted by sheepdog44 View Post
Transmission type Efficiency
Manual neutral engine off.100% @MPG <----- Fun Fact.
Manual 1:1 gear ratio .......98%
CVT belt ............................88%
Automatic .........................86%

  Reply With Quote
The Following User Says Thank You to Fat Charlie For This Useful Post:
Cobb (09-30-2014)
Old 09-30-2014, 10:53 AM   #6 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,700

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 50.45 mpg (US)
Thanks: 2,146
Thanked 4,932 Times in 2,478 Posts
Quote:
Originally Posted by 2000mc View Post
I'm going to need you to go back and run an ABA on each mod, and various combinations of mods
HA - not gonna happen!

Quote:
What can you tell me about the construction and attachment of the vertical spoilers? Is it in a hopefully permanent version, or will there be a 2.0?
Since I'm only keeping this car for the winter, there won't be a version 2.0. Construction: it's just coroplast, duct taped on.

Quote:
Also interested to see the trunk spoiler come out of beta testing, I've considered chopping my (currently removed) spoiler down to the width of the trunk lid, but still in fear of mutilating it enough that a handmade spoiler would look better
I'm just going to replicate it in coro and tape it on. But that style of spoiler would be pretty easy to make with rigid insulation foam board -- I'd put in the time to do that if I were keeping the car.
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
The Following User Says Thank You to MetroMPG For This Useful Post:
aerohead (11-12-2014)
Old 09-30-2014, 11:04 AM   #7 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,700

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 50.45 mpg (US)
Thanks: 2,146
Thanked 4,932 Times in 2,478 Posts
Quote:
Originally Posted by niky View Post
I think it should be fine... just need to get that Scangauge calibrated.
I probably won't have to fuel this car up for a couple of months, so I'm going to ask fellow ecomodder member & Civic owner Philscar (who lives near me and has exactly the same Civic) to calibrate it on his car.

Quote:
Last time I drove a 5-speed like that, I think it did around 19 km/l at 80 km/h (tank-to-tank)... but that was with some tollway traffic... so I think 20-21 km/l would be more representative of stock conditions.
Thanks! That was with a 1.8L?

19 km/L = 45 mpg US = 5.3 L/100 km
21 km/L = 49 mpg US = 4.8 L/100 km

The 2-way averaged constant speed runs I do are typically a little higher than an actual highway trip at that speed. But going by your numbers, it seems like my uncalibrated gauge may be ~10% optimistic (going by the 21 km/L end). I'll ask Phil to calibrate and will report back.
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
The Following User Says Thank You to MetroMPG For This Useful Post:
aerohead (11-12-2014)
Old 09-30-2014, 11:24 AM   #8 (permalink)
Master EcoModder
 
Join Date: Aug 2010
Location: Philippines
Posts: 1,857
Thanks: 1,004
Thanked 385 Times in 274 Posts
Yeah... that sounds about right. Damnit. Should have thought to calibrate the fill-up against the gauges on that eco-run!

Then again... that was a single data point with a very small fill-up, so it could be as low as 5% over... and I only did half the driving... (we swapped cars during the run), so it could be even better.

Still... seeing the lip spoiler and rear kickers... that gets the gears grinding on what might be possible on future experiments...
  Reply With Quote
Old 09-30-2014, 04:23 PM   #9 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 19,700

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

ForkenSwift - '92 Geo Metro EV
Last 3: 95.68 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 50.45 mpg (US)
Thanks: 2,146
Thanked 4,932 Times in 2,478 Posts
I dropped off the Scangauge to Phil. He figures he'll have some calibration numbers in about a week.

Should we start a pool? I'm guessing my graph numbers are 12% high.

UPDATE: calibration over 4 fill-ups showed the gauge was optimistic by 9.3%. Chart in post #1 updated with revised numbers.
__________________
Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
The Following User Says Thank You to MetroMPG For This Useful Post:
aerohead (11-12-2014)
Old 09-30-2014, 04:49 PM   #10 (permalink)
A madman
 
brucey's Avatar
 
Join Date: Mar 2008
Location: WV
Posts: 1,006

BULLSHIT TRUCK - '06 Chevy Silverado 1500
90 day: 17.41 mpg (US)

Pequod - '17 Subaru Outback
90 day: 22.79 mpg (US)
Thanks: 70
Thanked 178 Times in 95 Posts
Send a message via AIM to brucey
Oh come on Metro, you should know without proper A-B-A testing this belongs in the Unicorn Corral. (;

Otherwise, my roof rack delete is worth 40%, cause I got that better mileage that one time I got on the highway instead of driving up my dirt mountain path.


Last edited by brucey; 09-30-2014 at 04:57 PM..
  Reply With Quote
The Following 3 Users Say Thank You to brucey For This Useful Post:
chumly (10-03-2014), kYLEMtnCRUZr (09-30-2014), MetroMPG (10-01-2014)
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com