Go Back   EcoModder Forum > Introductions
Register Now
 Register Now
 


Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 08-18-2016, 06:04 PM   #1 (permalink)
EcoModding Lurker
 
Join Date: Aug 2016
Location: Alabama
Posts: 48
Thanks: 27
Thanked 2 Times in 2 Posts
Alabama, and my civic, salute you.

Salutations form north Alabama! I have recently gotten my first car (ever). It's a 2002 Honda civic LX coupe, I have not measured FE before mods so I lack baseline data but I want to assume it was meeting EPA standards. I am starting out with the mods that seem universal and guaranteed to work to some degree or another. I have installed a partial grill block, and belly pan, have also sealed all gaps with silicone. I have plans to move the side mirrors inside and get smooth wheel covers. Any fair estimates on what the finished product will get? I'm hopeful for low 50's but would be happy with low 40's.

Any suggestions for cheap and easy mods? I have considered doing a custom bumper, but that's at least a few months in the future, the mods listed above will be done in the next couple of weeks and then I will measure that as my baseline for FE.

I'm glad to be here and hope to contribute in some way, lurking can only get you so far but here goes nothing!

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 08-18-2016, 07:52 PM   #2 (permalink)
Master Novice
 
elhigh's Avatar
 
Join Date: Jan 2008
Location: SE USA - East Tennessee
Posts: 2,253

Josie - '87 Toyota Pickup
90 day: 28.65 mpg (US)

Felicia - '09 Toyota Prius Base
90 day: 47.14 mpg (US)
Thanks: 387
Thanked 566 Times in 416 Posts
Suggestions for cheap and easy mods? Dude, you're all over this, you're already doing them.

And welcome to the forum, by the way. Funny, trying to read up on North Alabama I see it's sometimes referred to as the Tennessee Valley. I'm also in the Tennessee Valley - the one in East Tennessee.

I see your car weighs in at about 2400 lbs, a featherweight by modern standards but not especially lightweight in the EM garage. Go ahead and start a fuel log for your car, it'll help you keep track of what works and what doesn't. Make one change at a time, watch it for a couple of tankfuls and see what direction the mileage moves.

There's a sticky at the top of the listing under Ecomodding Central that has a bunch of mods you can try.

There's another sticky at the top of the listing under Hypermiling/Ecodriver's Ed that has a bunch of tips to help you hone your technique. Pretty much anyone here will tell you that for return on investment, nothing beats adjusting the nut behind the wheel. It costs nothing to change how you drive.

Anyhoo, welcome.
__________________




"Reliability IS economy." - slowmover
  Reply With Quote
The Following 2 Users Say Thank You to elhigh For This Useful Post:
CappAttack (08-18-2016), MetroMPG (08-24-2016)
Old 08-18-2016, 09:44 PM   #3 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 4,970

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 58.15 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 1,752
Thanked 1,432 Times in 982 Posts
Welcome to EM. Is this a manual transmission or auto?
__________________


See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

  Reply With Quote
Old 08-18-2016, 11:26 PM   #4 (permalink)
EcoModding Lurker
 
Join Date: Aug 2016
Location: Alabama
Posts: 48
Thanks: 27
Thanked 2 Times in 2 Posts
It's an automatic, 4speed (I think). What could I take out to save weight? Not willing to ditch my spare tire/jack or my get home bag, also need all of my seats.

Also gonna switch to full synthetic 0w-20 mobil1 oil on my next change.

Last edited by CappAttack; 08-18-2016 at 11:39 PM..
  Reply With Quote
Old 08-19-2016, 12:14 AM   #5 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 4,970

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 58.15 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 1,752
Thanked 1,432 Times in 982 Posts
The auto constrains you. Fifty+ MPG is probably beyond reach without a lot of really slow driving. You can't coast with the engine off, like we can with the manuals. Weight reduction is a strategy, but before you hack the car... does it get driven in a lot of city or highway conditions? If the former, weiht loss can help because of all the acceleration. If the latter, weight loss matters little.

One of the best places for weight loss is in the wheels. If you have the stock 14 inch steelies, you have a 20lb wheel (excluding tires). If you get 1996-2000 HX rims, you get about 9lbs weight reduction per wheel. But since that is rotational weight, it has the effect of 18-36 lbs per wheel. So youcould count on a 100 lb effect through the rim swap. Cool.

Another option for your car is low rolling resistance (LRR) tires. Get them in a larger than stock diameter, and a thinner than stock width, and you will pick up gearing advantages and aero advantages.

Take off your power steering belt and test the feel of no PS. I go without. NBD. And it will yield an mpg or maybe more.

Your car has deceleration fuel cutoff capability. When you are approaching a hard stop, or need to shead some mph on a freeway, say approaching a far ahead traffic jam, slow down in gear without using brakes until necessary. The computer will turn off the fuel injectors.

Hoping that helps...

james
__________________


See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

  Reply With Quote
The Following 2 Users Say Thank You to California98Civic For This Useful Post:
CappAttack (08-19-2016), MetroMPG (08-24-2016)
Old 08-19-2016, 07:13 AM   #6 (permalink)
Master Novice
 
elhigh's Avatar
 
Join Date: Jan 2008
Location: SE USA - East Tennessee
Posts: 2,253

Josie - '87 Toyota Pickup
90 day: 28.65 mpg (US)

Felicia - '09 Toyota Prius Base
90 day: 47.14 mpg (US)
Thanks: 387
Thanked 566 Times in 416 Posts
I meant to point out that in a 2400-lb coupe, you may not have a lot of room for weight reduction without digging into the comfort of the car. You can shop for lighter seats but those are usually race-oriented, and look kind of cheesy, especially in a daily driven commuter. Weight reduction helps a lot, but only if you're in a lot of stop and go driving. If you're on the highway most of the time, there isn't a lot of advantage to be had from it.

+1 on the lighter wheels. If you can find Insight wheels (especially if you can get the Insight with them!), you can shed some pounds at each corner and they should bolt right up. Less unsprung weight also means a nicer ride, which is important in areas with rough roads.

Check tire pressure. That's another no-cost item. I run about 42 lbs in each tire and it's worth about 2-3mpg on my car. It's well above the door placard recommendation but below the sidewall limit spec.

Taking off the PS belt means, if you like the steering without, you can remove the PS pump entirely. There's a bit of weight reduction right there. It also frees up a tiny bit of space under the hood for wrenching. Save the pump, of course - when you sell the car on, the absence of power steering will probably put every potential buyer off your car.
__________________




"Reliability IS economy." - slowmover

Last edited by elhigh; 08-19-2016 at 07:20 AM..
  Reply With Quote
The Following User Says Thank You to elhigh For This Useful Post:
CappAttack (08-19-2016)
Old 08-19-2016, 10:21 AM   #7 (permalink)
EcoModding Lurker
 
Join Date: Aug 2016
Location: Alabama
Posts: 48
Thanks: 27
Thanked 2 Times in 2 Posts
Will definitely look into a PS delete. I can add the down shifting to my driving technique.

I'm mostly driving on highway. I need a minimum of 12 miles highway before getting anywhere inhabited, I live in the boonies. Average 50-55mph on roads near my house. I usually go 65 on the freeway.


I'm currently running tires at sidewall pressure, 44psi. I will look into rims/wheels when it's time to replace the tires. Previous owner replaced tires as a selling point.

Last edited by CappAttack; 08-19-2016 at 10:44 AM..
  Reply With Quote
Old 08-19-2016, 10:47 AM   #8 (permalink)
EcoModding Lurker
 
Join Date: Aug 2016
Location: Alabama
Posts: 48
Thanks: 27
Thanked 2 Times in 2 Posts
Also gonna look at lowering the car a couple inches. Can't go too low though cause I need to clear some pretty rough railroad tracks and speed bumps.
  Reply With Quote
Old 08-19-2016, 12:16 PM   #9 (permalink)
Master Novice
 
elhigh's Avatar
 
Join Date: Jan 2008
Location: SE USA - East Tennessee
Posts: 2,253

Josie - '87 Toyota Pickup
90 day: 28.65 mpg (US)

Felicia - '09 Toyota Prius Base
90 day: 47.14 mpg (US)
Thanks: 387
Thanked 566 Times in 416 Posts
An air dam, belly pan and lowering all are aimed at improving how the air behaves under the car, and of them I think the air dam is the cheapest and most convenient. We've seen effective air dams constructed out of plain old cardboard.

NOTE: Donkey CRX's two older Civics are running dams put together from Home Depot's Auto Body department. The white car appears to be wearing lawn edging and it looks surprisingly good, whereas the red car is equipped with a snow plow of an air dam from a big sheet of polyethylene. And both of those cars are consistently in the tippy-top of the MPG leaderboard. I don't remember if the cars are lowered, I think one of them is but it's a modest drop.
__________________




"Reliability IS economy." - slowmover
  Reply With Quote
The Following User Says Thank You to elhigh For This Useful Post:
CappAttack (08-20-2016)
Old 08-19-2016, 12:16 PM   #10 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 4,970

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 58.15 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 1,752
Thanked 1,432 Times in 982 Posts
Quote:
Originally Posted by CappAttack View Post
Also gonna look at lowering the car a couple inches. Can't go too low though cause I need to clear some pretty rough railroad tracks and speed bumps.
IIRC, you don't want to go down more than a couple inches, anyway. The benefits stop increasing at some point. One or two inches is enough. Search this site and you'll find discussions of it.

Do you have an ultragauge, or a scangauge? Close monitoring of your driving style, instant detailed feedbck from a gauge that can report RPM, load %, instant and short term MPG, and O2 sensor readings and fuel trim all at once on one screen is very useful. You might be amazed what a difference imperceptible changes in throttling make. I use the UltraGauge. I love it.

__________________


See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com