Go Back   EcoModder Forum > Introductions
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 05-19-2008, 12:35 AM   #1 (permalink)
EcoModding Lurker
 
Join Date: May 2008
Location: Minnesota
Posts: 29

FWD - '04 Honda Civic Si
90 day: 34.09 mpg (US)

RWD - '04 Honda S2000 NA
90 day: 27.25 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
04 Civic Si - New member from Minnesota

I have been reading about hypermiling and found this website/forum.

I already read through many of the posts and read about some of the extreme aeromods you guys did to your cars. Kudos to you for achieving such high mpg with simple, cost affective mods.

I daily drive a 04 Civic Si 5spd hatchback with a 2.0L K20A3 motor. I like the car because its fuel efficient yet sporty. I recently learned that Vtec in K20A3 works more like a Vtech-E than a regular Vtec. It apparently runs on 3 valves per cylinder upto 2200Rpm and then switches to 4valves per cylinder. After finding that out, I figured I will drive efficiently and see if I can make a game of getting some extra mileage out of my car. In typical pedal to the metal driving I was getting 25-26mpg.

Today I had some time so I decided to try hypermiling. I inflated the tires to 38 psi (makes the car very bumpy due to its stiff springs), filled up the tank and went for a A-B-A trip of 74.1 miles. Trip included city driving (I tried shifting below 2200), stop and go traffic on the intercity for about half a mile, and then 55-60mph driving on the interstate. I would say total of 50/50 city/hwy drive. I came back and filled up the tank until if won't take any more fuel. It took 1.823 gallons to do 74.1 miles. That comes to 40.64 miles per gallon. I found this astonishing! My assumption is that the Vtech-E is the reason for such great gas mileage without any mods at all.

My car is in need of tires and I am thinking about picking up some LRR Michelins to help with the FE. Seems like Michelin Energy MX4 is the way to go.

I will continue to hypermile and see if I can manage to maintain the same FE.

Just for kicks here is a picture of the car.



GreenWar - towards a greener tomorrow.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 05-19-2008, 12:38 AM   #2 (permalink)
Dartmouth 2010
 
SVOboy's Avatar
 
Join Date: Nov 2007
Location: Hanover, NH
Posts: 6,427

Vegan Powa! - '91 Honda CRX DX
Team Honda
90 day: 66.52 mpg (US)
Thanks: 92
Thanked 113 Times in 82 Posts
Send a message via AIM to SVOboy Send a message via MSN to SVOboy Send a message via Yahoo to SVOboy
Good old EP3 can turn out some decent numbers eh? It sounds like you've got a good handle on hypermiling, but have you seen our hypermiling tips yet?

Welcome to ecomodder!
  Reply With Quote
Old 05-19-2008, 12:45 AM   #3 (permalink)
EcoModding Lurker
 
Join Date: May 2008
Location: Minnesota
Posts: 29

FWD - '04 Honda Civic Si
90 day: 34.09 mpg (US)

RWD - '04 Honda S2000 NA
90 day: 27.25 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by SVOboy View Post
Good old EP3 can turn out some decent numbers eh? It sounds like you've got a good handle on hypermiling, but have you seen our hypermiling tips yet?

Welcome to ecomodder!
Yeah, I checked out the hypermiling tips. I tried using some of them today.

Ep3s have electric power steering so I bet that kind of helps. BTW, do you guys sell any window stickers? People tend to get offended if I am driving slow even if I am at the right most lane. Perhaps a window sticker will give them some idea why I am driving at 55 when speed limit is 60 or 70.
  Reply With Quote
Old 05-19-2008, 12:47 AM   #4 (permalink)
Dartmouth 2010
 
SVOboy's Avatar
 
Join Date: Nov 2007
Location: Hanover, NH
Posts: 6,427

Vegan Powa! - '91 Honda CRX DX
Team Honda
90 day: 66.52 mpg (US)
Thanks: 92
Thanked 113 Times in 82 Posts
Send a message via AIM to SVOboy Send a message via MSN to SVOboy Send a message via Yahoo to SVOboy
We do indeed have some clings: http://forum.ecomodder.com/showthrea...-page-239.html
  Reply With Quote
Old 05-19-2008, 12:50 AM   #5 (permalink)
EcoModding Lurker
 
Join Date: May 2008
Location: Minnesota
Posts: 29

FWD - '04 Honda Civic Si
90 day: 34.09 mpg (US)

RWD - '04 Honda S2000 NA
90 day: 27.25 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Sweet. I will order one of those stickers asap.
  Reply With Quote
Old 05-19-2008, 01:03 AM   #6 (permalink)
Depends on the Day
 
RH77's Avatar
 
Join Date: Nov 2007
Location: Kansas City Area
Posts: 1,761

Teggy - '98 Acura Integra LS
Sports Cars
90 day: 32.74 mpg (US)

IMA - '10 Honda Insight EX
Team Honda
90 day: 34.76 mpg (US)

Tessie - '06 Acura TSX Base
90 day: 28.2 mpg (US)
Thanks: 31
Thanked 40 Times in 34 Posts
Welcome

Welcome to EM...

Nice ride. The Si is a great package. Functional, high-performance, efficient.

I miss my '99 Si Coupe (B16A2). Honestly, the best vehicle I've owned -- also black (NBP) and efficient if I kept it out of VTEC. Silly me -- traded it for an Evo. Not kidding -- big mistake.

Anything above 35 for a K20 is great. You have the perfect car on your hands: fun when you want -- efficient when you need it.

Enjoy the site and keep up excellent testing -- A-B-A, etc. Get that sticker ASAP! It improves FE by at least 5%

Best FE to ya...

RH77
__________________
“If we knew what we were doing, it wouldn't be called research” ― Albert Einstein

_
_
  Reply With Quote
Old 05-19-2008, 02:42 PM   #7 (permalink)
EcoModding Lurker
 
Join Date: May 2008
Location: Wellington, FL
Posts: 9

Toaster Of Doom - '06 Honda Element EX-P
90 day: 20.96 mpg (US)

92 Integra DD - '92 Acura Integra RS
90 day: 27.84 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Your car doesn't have "Vtec-E" it's regular i-Vtec but only on the intake cams, not the exhaust cams like the RSX-S (k20a2 motor).

It makes it more fuel efficient and a pig on the road because of it. (I had an '02)

I highly suggest lowering the car on the stock shocks with progressive springs. It's a modest drop and won't effect the OEM shocks much at all.

Welcome to the site from another new member.


Steve
  Reply With Quote
Old 05-19-2008, 02:50 PM   #8 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 10,826

CM400E - '81 Honda CM400E
90 day: 58.68 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
90 day: 45.07 mpg (US)
Thanks: 2,176
Thanked 2,298 Times in 1,391 Posts
Welcome to the site. Definitly check out the tips posted and look into a scangauge for more feedback from your car. If you can keep it out of open loop mode you should be able to hit over 40 without too much trouble.
__________________
Current project: Help me kill my alternator - it is stubborn and won't die
  Reply With Quote
Old 05-19-2008, 07:54 PM   #9 (permalink)
EcoModding Lurker
 
Join Date: May 2008
Location: Minnesota
Posts: 29

FWD - '04 Honda Civic Si
90 day: 34.09 mpg (US)

RWD - '04 Honda S2000 NA
90 day: 27.25 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the warm welcome guys.

RH77, I bet you loved driving that Evo, so don't regret it. As you will find out, EP3 Si wasn't really as performance oriented as the previous generation. Redline is only at 6750.

K-series, you are right. I read at honda-tech that K20A3 works like a Vtec-E, but its not a Vtec-E. There is no lean burn mode. I won't say its dog slow, but its not fast. I have a rwd honda that I will call fast.

Daox, Thanks for the tips. I will get the scangauge II for sure. It will be cool to monitor mpg while driving. What do you exactly mean by open loop? I will do some search to find out, but in case you feel like repeating yourself.
  Reply With Quote
Old 06-25-2008, 08:51 AM   #10 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 10,826

CM400E - '81 Honda CM400E
90 day: 58.68 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
90 day: 45.07 mpg (US)
Thanks: 2,176
Thanked 2,298 Times in 1,391 Posts
Open loop is when the engine stops using the oxygen sensor and (almost always) makes the engine run rich. Some engines can dump up to 25% more (possibly even more) fuel while in open loop. This negates pretty much any benefit you would have seen from accelerating properly. On modern OBDII engines you really only kick into open loop upon very agressive acceleration. On my Matrix I literally have to put the pedal to the floor to get it into open loop. If you just accelerate at about half throttle (still pretty brisk acceleration) and keep the rpms at about 2000-3000 (under vtec engagement I assume) you should be doing pretty good.

__________________
Current project: Help me kill my alternator - it is stubborn and won't die
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Why I'm Choosing a Civic Over a Metro Wayneburg General Efficiency Discussion 43 03-02-2011 05:11 PM
04 civic mod questions Hayseed Aerodynamics 4 06-26-2008 02:07 PM
HILARIOUS!!! Civic Si For sale DifferentPointofView For Sale 9 04-05-2008 11:31 AM



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