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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 08-26-2018, 07:48 AM   #131 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 12,548
Thanks: 0
Thanked 1,622 Times in 1,447 Posts
Quote:
Originally Posted by roosterk0031 View Post
Don't think any ecoboost are FFV
It does surprise me that most FFVs still rely on natural aspiration and port injection, while direct injection is clearly better to allow easier cold starts and the usage of a higher compression ratio without too many compromises to the fuel-efficiency while running on gasoline.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 10-11-2018, 10:27 AM   #132 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,513

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

MPGiata - '90 Mazda Miata
90 day: 52.71 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 60.16 mpg (US)
Thanks: 4,058
Thanked 6,957 Times in 3,602 Posts
MPG Fail?

EPA ratings for GM's 4-banger truck are out, and the folks in the marketing department have their work cut out for them:


Quote:
The MPG rating for a 2WD 2.7-liter Chevrolet Silverado is 20 city/23 mpg highway/21 combined. As we told you this morning, the V6 offerings at Ford and Ram beat the GM four-banger by a hair.

https://www.thetruthaboutcars.com/20...gine-stack-up/
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
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
The Following User Says Thank You to MetroMPG For This Useful Post:
Xist (07-10-2022)
Old 10-11-2018, 10:30 AM   #133 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,513

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

MPGiata - '90 Mazda Miata
90 day: 52.71 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 60.16 mpg (US)
Thanks: 4,058
Thanked 6,957 Times in 3,602 Posts
Ha! Marketing has decided it's better to just run away from any talk of cylinder count:


Quote:
What’s interesting is that GM chooses to largely refer to this engine as a 2.7 Turbo, scarcely mentioning the words four-cylinder. In fact, that phrase appears nowhere in today’s press release about fuel economy
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
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
The Following 2 Users Say Thank You to MetroMPG For This Useful Post:
niky (10-12-2018), Xist (10-11-2018)
Old 10-11-2018, 09:52 PM   #134 (permalink)
Human Environmentalist
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 12,392

Acura TSX - '06 Acura TSX
90 day: 24.19 mpg (US)

Lafawnda - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Prius Plug-in - '12 Toyota Prius Plug-in
90 day: 57.64 mpg (US)

Mazda CX-5 - '17 Mazda CX-5 Touring
90 day: 26.68 mpg (US)

Chevy ZR-2 - '03 Chevrolet S10 ZR2
90 day: 17.14 mpg (US)
Thanks: 4,189
Thanked 4,378 Times in 3,353 Posts
I get the impression that turbo charging a smaller engine is no longer the fuel efficient way. Perhaps due to the lower compression ratio?
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!
  Reply With Quote
Old 10-11-2018, 10:48 PM   #135 (permalink)
Master EcoModder
 
Join Date: Jun 2016
Location: KY
Posts: 1,346

IGL - '04 Saturn Ion
Team Saturn
90 day: 56.19 mpg (US)
Thanks: 63
Thanked 364 Times in 268 Posts
Quote:
Originally Posted by MetroMPG View Post
EPA ratings for GM's 4-banger truck are out, and the folks in the marketing department have their work cut out for them:


https://www.thetruthaboutcars.com/20...gine-stack-up/
I read an article on Jalopnik that suggested that due to its lower than anticipated mileage it wouldn’t last in the Silverado, but could excel in the Colorado with less weight and size...

Given how badly they missed the mark I wonder if they couldn’t have done a BAS hybrid system on the 4.3 and kept it as base engine... it already got better mileage than the four cylinder does now...

Of course the four cyl is only available at the LT trim level, maybe it isn’t available without 4WD?
__________________
My current Ecotec project...


My last Ecotec project...
  Reply With Quote
Old 10-12-2018, 01:12 PM   #136 (permalink)
Master EcoModder
 
euromodder's Avatar
 
Join Date: Jul 2010
Location: Belgium
Posts: 4,683

The SCUD - '15 Fiat Scudo L2
Thanks: 178
Thanked 652 Times in 516 Posts
Quote:
Originally Posted by redpoint5 View Post
I get the impression that turbo charging a smaller engine is no longer the fuel efficient way. Perhaps due to the lower compression ratio?
Small (0.9 L to 1.2 L) blown engines are the new craze in Europe
Appearing in surprisingly large chariots

It's OK on the test bank
Not so much in real life driving ...
__________________
Strayed to the Dark Diesel Side

  Reply With Quote
Old 10-12-2018, 01:54 PM   #137 (permalink)
EcoModding Lurker
 
Join Date: Oct 2018
Location: Netherlands
Posts: 12

Focus - '02 Ford Focus Trend
90 day: 36.75 mpg (US)

Fizzy - '87 Yamaha FS1 2RU
90 day: 59.71 mpg (US)

Polo - '97 Volkswagen Polo
90 day: 36.21 mpg (US)

Golf - '17 Volkswagen Golf Bluemotion Connected
90 day: 48.93 mpg (US)
Thanks: 6
Thanked 2 Times in 2 Posts
Totally agree with Euromodder there. Have driven a few of them over the last few years, but most of them are only fun while staying before the torque drop-off RPM. Above that they're basically gutless. Best example is Peugeot 107 vs Peugeot 108, in low rev's - and especially city driving - the 108's turbo makes it very fun and economic to drive, but as soon as you get to highway speeds (75-80 MPH) it's fuel economy plummets and with a fair bit of headwind it can't even maintain 80MPH in 5th... The 107 has way less torque, but a much more usefull powercurve for highway driving. Same goes for the Peugeot 208 with the 1.2 turbo, off the line it's quite quick, but as soon as you get out of the max-torque area it feels quite scary during overtaking (due to lack of top end HP).

Talking about chariots: I'm off to my horseriding lessons
  Reply With Quote
Old 10-12-2018, 02:41 PM   #138 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,513

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

MPGiata - '90 Mazda Miata
90 day: 52.71 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 60.16 mpg (US)
Thanks: 4,058
Thanked 6,957 Times in 3,602 Posts
^ How many furlongs per bushel are you getting?
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
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
The Following 3 Users Say Thank You to MetroMPG For This Useful Post:
niky (10-12-2018), ThermionicScott (10-16-2018), Xist (10-12-2018)
Old 10-12-2018, 02:53 PM   #139 (permalink)
Master EcoModder
 
Join Date: Jun 2016
Location: KY
Posts: 1,346

IGL - '04 Saturn Ion
Team Saturn
90 day: 56.19 mpg (US)
Thanks: 63
Thanked 364 Times in 268 Posts
Quote:
Originally Posted by euromodder View Post
Small (0.9 L to 1.2 L) blown engines are the new craze in Europe
Appearing in surprisingly large chariots

It's OK on the test bank
Not so much in real life driving ...
The issue with these tiny engines, is that if they’re moving a fairly large car they’re almost always in boost and not very efficient, especially at highway speed where the biggest load is aero...

That’s not to say that a skilled hypermiler can’t get some phenomenal numbers from these cars, but the masses of people driving these cars aren’t hypermilers...

My ex got 28mpg hwy with her 2011 1.4T Cruze while my 2004 Saturn with its 2.2 liter engine got 30-32hwy when stock, at a similar speed
__________________
My current Ecotec project...


My last Ecotec project...
  Reply With Quote
The Following 2 Users Say Thank You to 19bonestock88 For This Useful Post:
niky (10-12-2018), redpoint5 (10-15-2018)
Old 10-12-2018, 07:28 PM   #140 (permalink)
Master EcoModder
 
Join Date: Aug 2010
Location: Philippines
Posts: 2,173
Thanks: 1,739
Thanked 589 Times in 401 Posts
Quote:
Originally Posted by redpoint5 View Post
I get the impression that turbo charging a smaller engine is no longer the fuel efficient way. Perhaps due to the lower compression ratio?
New turbo engines have relatively high compression. Plus direct injection, which theoretically gets you much better idling efficiency.

-

I think the real problem is heat and load. A small turbocharged engine, when at idle or cruising below boost threshold in relatively mild operating conditions, will get economy similar to (but not as good as) a non-turbo engine of the same size.

Add heat soak and load and etcetera, and that goes away. I've been able to get better numbers out of Ford's turbo four in the Explorer than the V6, but only by really trying. Drive both the same way and the difference is undetectable.

Most economy tests feature milder drive cycles than the real world, so on something like the NEDC, downsized turbos can slip through.

I think the EPA test is more realistic. And more difficult. Which is why the Chevy 2.7 isn't getting great numbers.

  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