Go Back   EcoModder Forum > EcoModding > EcoModding Central
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 10-07-2009, 12:14 PM   #1 (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
Article: pickup mileage - manufacturers are ecomodding their trucks for better MPG

The Trucktrend web site has posted a fairly interesting/comprehensive article about what steps manufacturers are taking to squeeze more MPG from recent pickups in response to customer demand, the threat of rising fuel prices, and tightening fuel economy rules.



Let's get this out of the way first: the title - "Good to the Last Drop: Getting the Most Possible Mileage Out of a Pickup" - is ridiculous, of course. Obviously they're not getting the best possible mileage. Truck makers are notoriously conservative, and the spectre/excuse of "consumer acceptance" plus fear of halting/reducing the ever-increasing towing/payload specs keeps them from doing anything beyond incremental changes.

But the article does cover a wide range of tweaks, and interestingly it quantifies many of them in terms of effect on MPG.

Weight reduction:
  • aluminum lower front control arms and 17-inch aluminum wheels on the GM XFE trucks
  • GM says "about a 0.7-mpg (EPA combined) benefit per 500 pounds in weight savings."
  • Toyota says: "A 50-pound weight reduction is worth about one percent in fuel economy."
  • Nissan says: "Reducing its weight by 100 kilograms (220 pounds) can boost economy by about 1.5 percent"
I wonder why the formulas disagree. I suspect it's the way the article was written (no context - city? hwy? combined?), rather than fundamental differences between the companies.

Improved aero:
  • better initial design, aided by CFD and wind tunnel testing
  • GM’s XFE pickups have lowered suspension, bigger front air dams, and OEM tonneau covers - " the tonneau cover gives a 0.1- to 0.2-mpg improvement, the air dam maybe 0.05 mpg, and the slightly lowered suspension another 0.05 mpg. "
  • Ford: "aerodynamic improvements on the 2009 F-150s average around 15 counts, or 0.015 Cd. “That 15-count improvement gets you on the order of 0.12 mpg highway"
It's funny that each of the Big 3 manufacturers claims "best" drag coefficient for at least one of its pickup models (depending on style, eg. whether it's a crew cab, long box, short box etc.).

Nissan's engineer comes across as the most pessimistic of the lot:

Quote:
“But a 10-percent [aero] drag reduction is almost nonachievable,” he adds. “That is drastically changing the style of the body. In the real world, two or three percent is really tough for us. And 100 kilograms of weight is almost a hopeless number. That is almost downsizing the truck, which is really tough. Honestly, 1 mpg is a huge number for me.”
Engine mechanical & calibration:
  • DCFO WTF?? Am I reading this right - is deceleration fuel cut-off (DFCO) really a NEW feature in some truck engines?? "Ford F-150: Among these are such fuel-saving features as open valve injection and deceleration fuel cutoff on 4.6- and 5.4-liter V-8s."
  • Also in the Ford: "a substantial 0.5-mpg gain comes from lowering engine idle speeds by about 100 rpm"
  • Dodge added variable valve timing to the available 5.7-liter Hemi V-8 engine, which already had Chrysler’s cylinder-deactivating Multi Displacement System. All this achieved an average 1-mpg improvement over 2008 models
  • Toyota's variable valve timing reduces part-load pumping losses
  • Nissan: friction-reducing measures as piston ring coating and camshaft microfinishing
Engine accessory:
  • Ford: high-efficiency alternators
  • Ford: changed pulley ratios on power steering pumps, and changed water pumps in the engine to make them more efficient
Transmissions & final drives:
  • taller rear axle final drives all around
  • six-speed transmissions: "the F-150’s new six-speed automatic contributes roughly a 0.25-mpg improvement"
  • Nissan mentions a CVT
LRR tires
  • Several trucks use them, and Nissan says: "Reducing rolling resistance by 10 percent can get you 0.2-0.3 percent better economy."
Full article: Good to the Last Drop: Getting the Most Possible Mileage Out of a Pickup - Consumer Feature - Truck Trend

__________________
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
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 10-07-2009, 12:45 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
Haha, I like the first comment:

Quote:
I have often wondered by designers make trucks, especially the F series and Silverado, resemble bricks. Its time for a little more imangination in pickup exterior design. They should not look like a Prius, but why do they have to look like something a child designed?
Quite true.
__________________
Current project: A better alternator delete
  Reply With Quote
Old 10-07-2009, 01:06 PM   #3 (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 noticed that one too. Also, that Nissan engineer's attitude is disappointing.
__________________
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
Old 10-07-2009, 01:27 PM   #4 (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
Quote:
“But a 10-percent [aero] drag reduction is almost nonachievable,” he adds. “That is drastically changing the style of the body. In the real world, two or three percent is really tough for us. And 100 kilograms of weight is almost a hopeless number. That is almost downsizing the truck, which is really tough. Honestly, 1 mpg is a huge number for me.”


Gee, I have a hard time recognizing what type of vehicle that is.
__________________



www.HyperKilometreur.com - Quand chaque goutte compte...
  Reply With Quote
Old 10-07-2009, 06:17 PM   #5 (permalink)
Banned
 
Join Date: Feb 2008
Location: california
Posts: 1,329
Thanks: 24
Thanked 161 Times in 107 Posts
Here is a thought. Don't buy a giant 3+ ton truck. Just imagine how much fuel you'll save.
  Reply With Quote
Old 10-07-2009, 06:37 PM   #6 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,761

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,585
Thanked 3,548 Times in 2,215 Posts
Nope, nope, can't do that!
__________________


  Reply With Quote
Old 10-07-2009, 06:47 PM   #7 (permalink)
Master Novice
 
elhigh's Avatar
 
Join Date: Jan 2008
Location: SE USA - East Tennessee
Posts: 2,310

Josie - '87 Toyota Pickup
90 day: 27.96 mpg (US)

Felicia - '09 Toyota Prius Base
90 day: 48.81 mpg (US)
Thanks: 422
Thanked 609 Times in 447 Posts
Gigantic ladder frame underneath means there's an awful lot of turbulence. Did the engineers forget that the whole truck is a wetted surface?

And what about those GARGANTUAN wheel openings? That drives me crazy, there's enough height above the tire for me to be able to insert my entire head!

In my brain, the winning model is to get the biggest bed you can in combination with the smallest engine. Drive gently, as if going faster cost more. Settle for somewhat less sprightly performance when carrying heavy loads and towing.

I know, common sense and all that. And yet, precious few people buy the big box stripper model. That's a shame.

'Cause the world needs more strippers.
__________________




Lead or follow. Either is fine.
  Reply With Quote
Old 10-07-2009, 08:35 PM   #8 (permalink)
Master EcoModder
 
chuckm's Avatar
 
Join Date: Aug 2008
Location: Monroe, LA
Posts: 308

Exploder - '02 Ford Explorer xlt

Rolla - '02 Toyota Corolla ce
Team Toyota
90 day: 44.43 mpg (US)
Thanks: 11
Thanked 13 Times in 12 Posts
elhigh, you know why they design them with those huge wheel openings, right? Otherwise, in the commercials when they drop that huge load of bricks in the bed from 20 feet (just like you do so often in real life), the tires don't touch the wheel well. I mean, you don't want to get the impression that your suspension will bottom out when you exit the second floor of the parking garage the fast way.
__________________
"Jesus didn't bring 'Natty Lite' to the party. He brought the good stuff."
  Reply With Quote
Old 10-07-2009, 08:40 PM   #9 (permalink)
.........................
 
darcane's Avatar
 
Join Date: Aug 2009
Location: Buckley, WA
Posts: 1,586

Ninja 650R - '06 Kawasaki Ninja 650R
90 day: 52.02 mpg (US)

B*tch - '01 Honda Civic HX
Team Honda
90 day: 38.09 mpg (US)

Ms. Hyde - '06 Cadillac CTS V
Sports Cars
90 day: 16.93 mpg (US)
Thanks: 375
Thanked 480 Times in 311 Posts
Quote:
Originally Posted by elhigh View Post
And what about those GARGANTUAN wheel openings? That drives me crazy, there's enough height above the tire for me to be able to insert my entire head!
On my truck, those huge wheel openings don't even have inner fenders. Air flows in and is directed right at the parachute, er.. rear bumper.

Quote:
Originally Posted by elhigh View Post
In my brain, the winning model is to get the biggest bed you can in combination with the smallest engine. Drive gently, as if going faster cost more. Settle for somewhat less sprightly performance when carrying heavy loads and towing.

I know, common sense and all that. And yet, precious few people buy the big box stripper model. That's a shame.

'Cause the world needs more strippers.
That's what I've got. Silverado W/T model with a long bed. No whiz-bang do-dads, no power locks, power windows, etc. Smallest V8 that's available (The V6 can't tow enough for my needs) and 2wd.

I would have preferred a manual and higher gears, however manuals are virtually non-existant and I got a great deal on the truck I found.
__________________
2001 Civic HX Mods


Past Cars:
CTS-V

2003 Silverado Mods
  Reply With Quote
Old 10-07-2009, 09:36 PM   #10 (permalink)
Master EcoModder
 
Join Date: Sep 2009
Posts: 5,927
Thanks: 877
Thanked 2,020 Times in 1,303 Posts
Something like the T100 with a 4 cylinder and a 6 speed. It would carry the regulation 4X8 sheet of plywood if memory serves me right.

regards
Mech

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Court Voids Mileage Standards for Light Trucks SVOboy General Efficiency Discussion 6 01-13-2013 05:27 AM
EcoModding for Beginners: Getting great gas mileage. SVOboy EcoModding Central 55 08-21-2012 12:34 AM
Interesting article: 110 mpg bio-d motorcycle conversion MetroMPG Motorcycles / Scooters 7 02-21-2011 03:39 PM
My introduction to hypermiling the Smart Ptero Hypermiling / EcoDriver's Ed 12 10-28-2008 08:32 PM
Article: 57 mpg? That's so 20 years ago SVOboy General Efficiency Discussion 17 12-23-2007 10:56 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