Go Back   EcoModder Forum > EcoModding > Success Stories
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 12-11-2016, 10:11 AM   #31 (permalink)
Furry Furfag
 
Baltothewolf's Avatar
 
Join Date: Nov 2013
Location: Apple Valley
Posts: 2,084

Winsight - '00 Honda Insight
90 day: 56.69 mpg (US)

Miaderp - '95 Mazda Miata
90 day: 28.53 mpg (US)
Thanks: 67
Thanked 409 Times in 313 Posts
4.08 gearing, so you shortened the gearing up, why? The stock HX is 3.73, BTW.

__________________

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 12-11-2016, 11:24 AM   #32 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,299

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,373
Thanked 2,172 Times in 1,469 Posts
You engine bay poc shows an exhaust manifold on which the upstream O2 sensor is missing. If that is how you are actually running, how are you managing fuel trim? You cannot get lean burn that way. Also, Balto's question above. Your gearing is too short. Given all these mods, I'd say 36 mpg at 60 mph sounds increadibly good. You'll likely get much lower numbers on average. Engine bay looks great, though. Seems you ae building more of a street racer than a fuel sipper. Is that what's up?
__________________
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 12-11-2016, 11:58 AM   #33 (permalink)
EcoModding Lurker
 
Join Date: May 2016
Location: columbia sc usa
Posts: 37
Thanks: 4
Thanked 8 Times in 6 Posts
im using a 4-2-1 oem manifold off of a 98 civic ex with the cast upper 4-2 part. it alows you to use the oem 5 wire and read all 4 cylinders right after the head ports and make the most low to mid range torque.

as for the 4.08 final drive out of the lx civic 4 door. i used this for the build because of the toques multiplication of the shoeter gearing and the rpm range that the hx likes to use lean burn is 2200 rpm up to 3200 rpm. this gearing puts me in the ideal rpm range in 5th gear at 60 to 70 mph. 60 mph =2400rpm and 70 mph= 2900rpm. this also drops the lode on the engine and i can get lean burn in all gears but 1st.
  Reply With Quote
Old 12-11-2016, 03:28 PM   #34 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,299

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,373
Thanked 2,172 Times in 1,469 Posts
Oh, yeah. That O2 is a bit lower. I could not see it behind the AC exchanger (I took mine out). Where did you read about that RPM band for lean burn? For example here is a guy who says 1800 to nearly 4000 (!) works: http://ecomodder.com/forum/showthrea...tml#post473444

Just wondering... there is a lot of contradictory info out there!
__________________
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 12-11-2016, 03:42 PM   #35 (permalink)
EcoModding Lurker
 
Join Date: May 2016
Location: columbia sc usa
Posts: 37
Thanks: 4
Thanked 8 Times in 6 Posts
Quote:
Originally Posted by California98Civic View Post
Oh, yeah. That O2 is a bit lower. I could not see it behind the AC exchanger (I took mine out). Where did you read about that RPM band for lean burn? For example here is a guy who says 1800 to nearly 4000 (!) works: http://ecomodder.com/forum/showthrea...tml#post473444

Just wondering... there is a lot of contradictory info out there!
i have a few ways to watch lean burn in my car and im as master ase tech so i have alot of acces to oem info. the vx had a low rpm lean burn mode and the hx has been said to have it also but the the hxhas whats like a variable leanburn that will pick how lean to go baced on feed back from the sensors. i have seen low rpm leaning out in the 16.1 afr but have not seen lean burn ie 19.1 and lower till 2200 and not past 3200 rpm i have 2 defrent ecus for my car both non cali and they act the same. i have a new ngk 5 wire. have set the fuel presser to the oe speck. new bosh ev6 injectors that are the oem 185 cc and a spotless egr system so all the systems are working lol. i also watch true rpm feedback from the ecu so its dead one.
  Reply With Quote
The Following User Says Thank You to 98hxman For This Useful Post:
California98Civic (12-11-2016)
Old 12-31-2016, 09:08 AM   #36 (permalink)
5 pin sensor
 
Join Date: Sep 2014
Location: Dallas
Posts: 350

Zippy - '96 Honda Civic Hx
Team Honda
90 day: 40.77 mpg (US)

Boring - '11 Ford Fusion Sel
90 day: 21.88 mpg (US)
Thanks: 38
Thanked 73 Times in 56 Posts
The shorter gearing really makes the car more fun to drive and increased my gas mileage because you could get into lean burn at lower speeds. I think on my black car in the sig I could get into lean burn at 52mph and it would stay in lean burn down to 47mph. It also had a replacement flywheel that was not oem so it was heavier, I could hear the idle air control valve constantly fluttering at idle to keep the car at its idle speed from the extra weight

The y5 had dished pistons and lower compression. The new higher compression car probably isn't as effecient as the lower comp one in lean burn because it's adding more fuel to less air volume. Probably runs alot better though, but no advantage to gas mileage.

To update my trolling in page 2 my red car has been getting 42mpg city after fixing a major oil pan leak and replacing the factory pcv valve
__________________
Current: 1997 civic lx
Past: 1998hx/1996hx/1997lx/1997hx Cali/1997hx
OG lean burn member

My civic thread
  Reply With Quote
Old 02-01-2017, 11:17 AM   #37 (permalink)
EcoModding Lurker
 
Join Date: May 2016
Location: columbia sc usa
Posts: 37
Thanks: 4
Thanked 8 Times in 6 Posts
i used .50 over bore y5 pistons so the shape is the same. the higher compression is from the .009 head mill and the .030 3 layer head gasket.

  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com