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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 03-16-2017, 03:24 PM   #31 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 8,842
Thanks: 1,923
Thanked 2,891 Times in 2,260 Posts
There's one Charger that never made it into the Duke boys hands.

But I call revisionist B.S., the Cannonball ran East to West.

https://en.wikipedia.org/wiki/Cannon...al_Trophy_Dash

Quote:
Originally Posted by gumby79
It gets even more confusing when you enter Oregon with 3 prices for diesle [sic]...
Plus which, if you're out on the coast, to get clear premium you have to take a 5-gallon can out to the end of the pier. On I-5 they're a little more relaxed.


Last edited by freebeard; 03-16-2017 at 03:29 PM..
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 03-20-2017, 08:43 AM   #32 (permalink)
Rat Racer
 
Fat Charlie's Avatar
 
Join Date: May 2011
Location: Route 16
Posts: 2,924

Al the Third, year four - '13 Honda Fit Base
Team Honda
90 day: 42.9 mpg (US)
Thanks: 947
Thanked 1,093 Times in 712 Posts
Hollywood gets everything wrong, you know that!
__________________

Quote:
Originally Posted by sheepdog44 View Post
Transmission type Efficiency
Manual neutral engine off.100% @MPG <----- Fun Fact.
Manual 1:1 gear ratio .......98%
CVT belt ............................88%
Automatic .........................86%

  Reply With Quote
Old 03-20-2017, 03:07 PM   #33 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 8,842
Thanks: 1,923
Thanked 2,891 Times in 2,260 Posts
Yeah, but this time it's important stuff.
  Reply With Quote
Old 03-22-2017, 02:56 PM   #34 (permalink)
EcoModding Lurker
 
Join Date: Jan 2008
Location: Maine
Posts: 57
Thanks: 3
Thanked 1 Time in 1 Post
I wouldn't limit throttle opening, not having enough power when you *do* really need it could be a serious safety issue. Use one of the tools mentioned to improve mileage, or just drive 5 mph slower.
  Reply With Quote
Old 03-22-2017, 04:54 PM   #35 (permalink)
EcoModding Lurker
 
Join Date: Jun 2012
Location: waterloo, Ontario
Posts: 15
Thanks: 0
Thanked 1 Time in 1 Post
half throttle

I did limit the WOT on a friend's Datsun 510. He kept blowing engines, so I put a 2 liter (810) in place of the 1.6 and made it so he could only use a little over half throttle.(he used it for navigational rallying). Needless to say, "Leadfoot Seeley" didn't blow any more Datsun engines. Not sure what the effect was on fuel mileage, but he still managed to get a few speeding tickets.
  Reply With Quote
Old 03-23-2017, 12:21 PM   #36 (permalink)
Eco Dabbler
 
Join Date: Oct 2015
Location: Colorado
Posts: 40
Thanks: 31
Thanked 30 Times in 16 Posts
There are some pretty good suggestions in this thread for User Interface reminders. The Scan Gage as feedback is always good, but so is the idea of a spring that you can push through when needed -- but serves as a reminder that "hey buddy you're dipping in".

Also, as pointed out, limiting HP does not change the internal friction and other losses of your vehicle. Sticking it in Neutral and coasting does.

The key element which has been eluded to is the max conditions of the engine. Every engine has a max efficiency point (most power per fuel), and a max output point (max torque). Both conditions are at near WOT because of the reduction in pumping losses, but the max efficiency point is at a much lower RPM.

Since the greatest consumer of fuel is acceleration and hill climbing, driving a Manual Transmission allows you to be in a high gear at a relatively open throttle -- maximizing efficiency for the given task. (A lot of auto makers enrich the mixture at near WOT to avoid killing the catalyst, so driving at 10% under true WOT is usually best.)

I think the take-away from this discussion is fuel economy (for a given vehicle) is more about attitude than throttle position.
  Reply With Quote
Old 03-23-2017, 12:25 PM   #37 (permalink)
Hydrogen Nut
 
Ptero's Avatar
 
Join Date: Oct 2008
Location: California
Posts: 150

Smart Car ForTwo Pure - '08 Smart Fortwo Pure stripped
90 day: 51.35 mpg (US)

BMW 750iL V12 - '90 BMW V12
90 day: 26.4 mpg (US)

Wildfire 250C - '08 Shandong Pioneer 250C
Thanks: 2
Thanked 32 Times in 22 Posts
Low-tech solution works

A lot of good advice in here. Pulse and glide is good.
But I've found one of the greatest ways to control a sensitive throttle
and increase MPG is to
TAKE YOUR SHOE OFF!
That's right.
Drive in your socks.
Huge difference.
Costs nothing.
__________________
Ptero
  Reply With Quote
Old 03-23-2017, 01:04 PM   #38 (permalink)
EcoModding Lurker
 
Join Date: Jun 2012
Location: waterloo, Ontario
Posts: 15
Thanks: 0
Thanked 1 Time in 1 Post
Although pumping losses are reduced at wide open throttle, it has been my experience that the pumping losses are a lot less than the loss of efficiency caused by running at high manifold pressure (low vacuum). I have always gotten the best mileage when running at Max Torque RPM with the highest manifold pressure possible - which translates to as little throttle opening as possible. At max torque you require less throttle opening for a given power output than at any other speed. Of course, doing this in top gear is obvious.
Some vehicles will get you a speeding ticket on just about any highway at peak torque in high gear. On my Ranger 4.0 2400RPM in top gear is 120kph (3.55 gears and 225-70 16 tires) On the 1975 Celica GT I drove years ago it was closer to 85 MPH,( and with a light foot at that speed 42mpg was not a problem.)
  Reply With Quote
Old 03-23-2017, 04:03 PM   #39 (permalink)
Master EcoModder
 
JRMichler's Avatar
 
Join Date: Feb 2011
Location: Phillips, WI
Posts: 929

Nameless - '06 GMC Canyon
90 day: 36.73 mpg (US)
Thanks: 178
Thanked 352 Times in 227 Posts
My very first car was a 1961 Rambler American with the flathead six engine. When I first bought it, the top speed was 60 MPH, at which speed it got 30 MPG. I soon found that the throttle plate would only open halfway with the gas pedal on the floor. Fixed the throttle linkage, and got 24 MPG.

So yes, a throttle limiter will save gas. But the performance is terrible.
__________________
The vacuum gauge plus wheel covers helped increase summer 2015 mileage to 38.5 MPG, while summer 2016 mileage was 38.6 MPG without the wheel covers. Drove 10,588.6 miles in 2016 at 35.0 MPG.
  Reply With Quote
Old 03-23-2017, 04:23 PM   #40 (permalink)
EcoModding Lurker
 
Join Date: May 2016
Location: Alameda, Ca
Posts: 6
Thanks: 2
Thanked 2 Times in 2 Posts
Not to downplay your idea...but in an emergency you will want full throttle.

  Reply With Quote
The Following User Says Thank You to ejbr For This Useful Post:
Fat Charlie (03-23-2017)
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com