Go Back   EcoModder Forum > EcoModding > Hypermiling / EcoDriver's Ed
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 03-12-2008, 01:15 PM   #21 (permalink)
EcoModding Apprentice
 
jwxr7's Avatar
 
Join Date: Dec 2007
Location: mid michigan
Posts: 136

the metro experience (retired) - '94 geo metro 4 dr HB
90 day: 66.44 mpg (US)
Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by tasdrouille View Post
There's a real fuzzy one in there for the 1.0 GEO SI engine
Thanks, Wow that is fuzzy and it looks like a small peak efficiency island compared to the saturn 1.9l's.

__________________


Best tank= 81.23 mpg on 07-01-2008
Longest range= 791 miles on 9.74 gallons
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 03-12-2008, 01:30 PM   #22 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 20,785

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

MPGiata - '90 Mazda Miata
Last 3: 51.27 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 58.31 mpg (US)
Thanks: 2,638
Thanked 5,544 Times in 2,845 Posts
Thanks for finding/posting that! First map I've seen for the 1.0 .

That's interesting - the best case island is higher up the RPM scale than I've been aiming for during P&G.

Though, having said that, the XFi cam shifts the peak island to a lower RPM...
__________________
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
Old 03-12-2008, 02:52 PM   #23 (permalink)
EcoModding Apprentice
 
jwxr7's Avatar
 
Join Date: Dec 2007
Location: mid michigan
Posts: 136

the metro experience (retired) - '94 geo metro 4 dr HB
90 day: 66.44 mpg (US)
Thanks: 0
Thanked 1 Time in 1 Post
For those with a vortech 4.3l GM engine. I found info for my truck engine here http://www.bucksengines.com/Data/24.pdf. All the way down on page 71 it has a BSFC chart. There is a wealth of other neat info there too, like % power loss vs intake air temp and intake air restriction.

sorry bbb3108 if this is taking over your thread .
__________________


Best tank= 81.23 mpg on 07-01-2008
Longest range= 791 miles on 9.74 gallons
  Reply With Quote
Old 03-17-2008, 05:31 AM   #24 (permalink)
mazdaspeed3 - 27 mpg
 
optiwatch's Avatar
 
Join Date: Feb 2008
Location: Georgia
Posts: 8

MS3 - '07 Mazda Mazdaspeed3 mazdaspeed
90 day: 27.85 mpg (US)

speedy3 - '07 Mazda Mazda 3 mazdaspeed3
Thanks: 0
Thanked 0 Times in 0 Posts
Built for acceleration, not MPG

My mazdaspeed3 has 6 gears, but the gearing is target at 0-60 acceleration. I can shift into 6th at 45-50 mph, but driving at 80 mph leaves me wanting for a 7th gear. Can I avoid changing out the gears by installing larger tires?
__________________
power, performance, and fuel economy - can't they all just get along
  Reply With Quote
Old 03-17-2008, 09:53 AM   #25 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 20,785

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

MPGiata - '90 Mazda Miata
Last 3: 51.27 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 58.31 mpg (US)
Thanks: 2,638
Thanked 5,544 Times in 2,845 Posts
Yes, though you'll also raise the vehicle, which may increase drag (e.g. Lexus claims a Cd .01 decrease for a 1 inch drop).

Your car and mine are vastly different, but note that by lowering my RPM 20%, my steady state fuel economy improved by about 5%. You could use that as a starting point for some rough calcs. There are many tire size calculators out there for figuring out how a circumference change affects diameter & RPM.
__________________
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
Old 03-17-2008, 10:52 PM   #26 (permalink)
Giant Moving Eco-Wall
 
DifferentPointofView's Avatar
 
Join Date: Dec 2007
Location: The Dale, IL (or A-Dale)
Posts: 1,120

The Jeep! - '95 Jeep Grand Cherokee ZJ Laredo
90 day: 23.75 mpg (US)

The Caliber - '07 Dodge Caliber R/T
90 day: 30.6 mpg (US)

The 'Scort - '98 Ford Escort LX
Thanks: 0
Thanked 7 Times in 6 Posts
On all the car audio-video forums they refer ICE as In Car Entertainment.

Your engine is generally most efficient at 70-80% throttle, but you then run into the aero problem again.

Ever try to run against 45 mile per hour winds during a storm? you don't get very far, and you get tired pretty quickly. A car at 70mph is having to push through all that air, which is also pushing you back. you go slow, you have an easier time. So most vehicles (autos specifically) have a sweet-spot between 45-55 range. Generally, that spot is around 45-52ish. Also, cars usually have a hard drop in FE for every 60mph, especially in trucks and SUV's. Mostly from the wall-like windshield.

I can go a lot farther on a tank going 50, but I rarely get to do that cause I'm usually carting around a lot of impatient people. they don't mind me doing 55.
__________________


Yea.. I drive a Jeep and I'm on a fuel economy site, but you just wouldn't understand... "It's a Jeep thing!" *Jeep Wave*

Did I Use Too Many Abbreviations? Here's The Abbreviations List
  Reply With Quote
Old 03-17-2008, 11:17 PM   #27 (permalink)
Liberti
 
LostCause's Avatar
 
Join Date: Feb 2008
Location: California
Posts: 504

Thunderbird - '96 Ford Thunderbird
90 day: 27.75 mpg (US)
Thanks: 0
Thanked 7 Times in 7 Posts
As all cars will vary, the easiest and most accurate route will be to do some experiments with FE instrumentation at different speeds.

I know automatics will drop off once the torque converter opens up, so 45mph (or whenever the TC kicks on) tends to be the best spot for those cars. My car has such low gearing that at 45mph I'd be running 1000-1200rpm, which is only 400-600rpm above idle. When I drive 55mph, my engine rpm is ~1550-1600, so I do take a pretty significant hit...but I wouldn't stay legal otherwise.

Modifying your engine for low-gearing/low-end torque might spell disaster if it is overdone. I imagine massive forces are going into a drivetrain at loads experienced at such slow speeds. This is mitigated w/ aerodynamics and LRR tires, though.

- LostCause
  Reply With Quote
Old 03-17-2008, 11:23 PM   #28 (permalink)
Giant Moving Eco-Wall
 
DifferentPointofView's Avatar
 
Join Date: Dec 2007
Location: The Dale, IL (or A-Dale)
Posts: 1,120

The Jeep! - '95 Jeep Grand Cherokee ZJ Laredo
90 day: 23.75 mpg (US)

The Caliber - '07 Dodge Caliber R/T
90 day: 30.6 mpg (US)

The 'Scort - '98 Ford Escort LX
Thanks: 0
Thanked 7 Times in 6 Posts
Quote:
45mph I'd be running 1000-1200rpm, which is only 400-600rpm above idle. When I drive 55mph, my engine rpm is ~1550-1600, so I do take a pretty significant hit...but I wouldn't stay legal otherwise.
Huh, same here. What do you run doing 70mph? I go almost 2000rpm, not quite on the line, but close enough. I do about 1200 at 47. TC opens at 45.
__________________


Yea.. I drive a Jeep and I'm on a fuel economy site, but you just wouldn't understand... "It's a Jeep thing!" *Jeep Wave*

Did I Use Too Many Abbreviations? Here's The Abbreviations List
  Reply With Quote
Old 03-18-2008, 05:11 AM   #29 (permalink)
Master EcoModder
 
Join Date: Jan 2008
Location: Victoria , Australia.
Posts: 499
Thanks: 20
Thanked 46 Times in 33 Posts
Quote:
Originally Posted by jwxr7 View Post
For those with a vortech 4.3l GM engine. I found info for my truck engine here http://www.bucksengines.com/Data/24.pdf. All the way down on page 71 it has a BSFC chart. There is a wealth of other neat info there too, like % power loss vs intake air temp and intake air restriction.

sorry bbb3108 if this is taking over your thread .
Great link there. Thanks for posting.

Pete.
  Reply With Quote
Old 03-18-2008, 08:43 AM   #30 (permalink)
EcoModding Apprentice
 
jwxr7's Avatar
 
Join Date: Dec 2007
Location: mid michigan
Posts: 136

the metro experience (retired) - '94 geo metro 4 dr HB
90 day: 66.44 mpg (US)
Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Great link there. Thanks for posting.

Pete
No problem. Too bad it's hard to find comprehensive stuff like that for other engines.

__________________


Best tank= 81.23 mpg on 07-01-2008
Longest range= 791 miles on 9.74 gallons
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
News: Utah Considers Joining 80 MPH Speed Limit Club MetroMPG General Efficiency Discussion 68 11-04-2009 07:25 PM
Field Weakening Experiment for Speed Increase TomEV Fossil Fuel Free 12 04-10-2008 03:53 PM
Series Motor - Speed vs Torque TomEV Fossil Fuel Free 3 03-02-2008 12:27 PM
Video: Driving with a Steady Speed, or a Steady Accelerator? Peakster Hypermiling / EcoDriver's Ed 22 01-11-2008 10:22 PM
Basic EcoDriving Techniques and Instrumentation SVOboy Instrumentation 2 11-17-2007 11:38 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