Go Back   EcoModder Forum > EcoModding > General Efficiency Discussion
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 04-10-2008, 11:48 AM   #1 (permalink)
Master EcoModder
 
tasdrouille's Avatar
 
Join Date: Jan 2008
Location: Mirabel, QC
Posts: 1,672

The Guzzler - '08 Hyundai Elantra GL
90 day: 33.12 mpg (US)

Got Soul? - '11 Kia Soul 2U
Thanks: 35
Thanked 85 Times in 56 Posts
Brake Specific Fuel Consumption: A Really Useful Concept



There's a very interesting article on BSFC over at Autospeed. It's a must read for anyone concerned about FE.

http://www.autospeed.com/cms/A_110216/article.html

__________________



www.HyperKilometreur.com - Quand chaque goutte compte...
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 04-10-2008, 02:45 PM   #2 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,175

CM400E - '81 Honda CM400E
90 day: 51.49 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
Mitsubishi
90 day: 56.69 mpg (US)
Thanks: 2,475
Thanked 2,538 Times in 1,530 Posts
Very good article. It cleared up a few things I had thought (and was wrong about).
__________________
Current project: A better alternator delete
  Reply With Quote
Old 04-10-2008, 11:32 PM   #3 (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 41 Times in 35 Posts
Great find!

It seemed to explain quite a lot that remained unclear...

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

_
_
  Reply With Quote
Old 04-11-2008, 11:52 AM   #4 (permalink)
Hypermiler
 
PaleMelanesian's Avatar
 
Join Date: Dec 2007
Location: Texas
Posts: 2,320

PaleCivic (retired) - '96 Honda Civic DX Sedan
90 day: 69.2 mpg (US)

PaleFit - '09 Honda Fit Sport
Team Honda
Wagons
90 day: 44.06 mpg (US)
Thanks: 611
Thanked 428 Times in 280 Posts
I have. Pulse & Glide is the best way to take advantage of BSFC.
__________________



11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles
  Reply With Quote
Old 04-11-2008, 01:50 PM   #5 (permalink)
Master EcoModder
 
tasdrouille's Avatar
 
Join Date: Jan 2008
Location: Mirabel, QC
Posts: 1,672

The Guzzler - '08 Hyundai Elantra GL
90 day: 33.12 mpg (US)

Got Soul? - '11 Kia Soul 2U
Thanks: 35
Thanked 85 Times in 56 Posts
CVT transmissions are based on this concept.
__________________



www.HyperKilometreur.com - Quand chaque goutte compte...
  Reply With Quote
Old 04-11-2008, 02:26 PM   #6 (permalink)
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,175

CM400E - '81 Honda CM400E
90 day: 51.49 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
Mitsubishi
90 day: 56.69 mpg (US)
Thanks: 2,475
Thanked 2,538 Times in 1,530 Posts
I just wish that manufactuers published this info! Its almost impossible to find BSFC charts for cars.
__________________
Current project: A better alternator delete
  Reply With Quote
Old 04-11-2008, 04:37 PM   #7 (permalink)
Hypermiler
 
PaleMelanesian's Avatar
 
Join Date: Dec 2007
Location: Texas
Posts: 2,320

PaleCivic (retired) - '96 Honda Civic DX Sedan
90 day: 69.2 mpg (US)

PaleFit - '09 Honda Fit Sport
Team Honda
Wagons
90 day: 44.06 mpg (US)
Thanks: 611
Thanked 428 Times in 280 Posts
I've been tempted to go out and make my own bsfc chart. Using the scangauge, do multiple runs on a flat level road. Start at 1000 rpm so and run up through the rpm range. One run at 5% throttle, one at 10%, etc... Rig up a video camera for review and chart out the Gallons / hour vs rpm.

or something like that...
__________________



11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles

Last edited by PaleMelanesian; 04-11-2008 at 05:17 PM..
  Reply With Quote
Old 04-11-2008, 06:07 PM   #8 (permalink)
Hypermiler
 
PaleMelanesian's Avatar
 
Join Date: Dec 2007
Location: Texas
Posts: 2,320

PaleCivic (retired) - '96 Honda Civic DX Sedan
90 day: 69.2 mpg (US)

PaleFit - '09 Honda Fit Sport
Team Honda
Wagons
90 day: 44.06 mpg (US)
Thanks: 611
Thanked 428 Times in 280 Posts
I used it to determine the optimum rpm and load for the pulse. I don't have a chart for my engine, but looking at several others, it seems that 1500-2000 rpm and about 3/4 throttle is the peak. That's what I use for the pulse part of my P&G. This way, when you do use the engine, it's at its best (lowest?) bsfc. And when you're not doing that, it's off.

It works, too. Grille block, tire pressure, scangauge, and P&G give me the numbers I have.
__________________



11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles

Last edited by PaleMelanesian; 04-11-2008 at 06:19 PM..
  Reply With Quote
Old 04-11-2008, 11:04 PM   #9 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,275

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

MPGiata - '90 Mazda Miata
90 day: 52.07 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)
Thanks: 3,811
Thanked 6,690 Times in 3,468 Posts
I've changed my P&G technique since finding the BSFC map for my engine.

The little 3-cyl mill's peak efficiency is at a higher RPM than I'd been going to previously. It's basically centered just above 3k RPM, where I was aiming for low 2k range before. Makes for brisker acceleration.

__________________
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: Oops, I did it again! Bought another cheap, 3-cylinder Mirage. Mods in progress...
Ecodriving test: Manual vs. automatic transmission MPG showdown



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
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine braking without using fuel idea Dane-ger EcoModding Central 38 02-04-2010 11:35 AM
Why SUV fuel economy is so much more important than small car fuel economy... SVOboy General Efficiency Discussion 30 02-23-2009 07:26 PM
Motorcycle Fuel Consumption (gas mileage) guide ginni650 Motorcycles / Scooters 0 01-16-2008 07:57 AM
Illustrated: fuel consumption at higher speeds MetroMPG Hypermiling / EcoDriver's Ed 1 11-28-2007 07:58 PM
Basic EcoDriving Techniques and Instrumentation SVOboy Instrumentation 2 11-17-2007 12:38 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com