From a stop should car be gunned up to speed? - Fuelly Forums

Click here to see important news regarding the aCar App

Go Back   Fuelly Forums > Fuel Talk > Hypermiling
Today's Posts Search Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 06-03-2007, 03:46 PM   #1
Registered Member
 
Join Date: Jun 2007
Posts: 4
Country: United States
From a stop should car be gunned up to speed?

O.K. the question is, from a stop, should one quickly accelerate up to a optimum operating speed where there will be the best mpg. Or should one accelerate , gradurally, which will take longer to get there & perhaps burn more gas than a faser accelaration over a shorter time. This is a physics/math question. Voulme = E MC 2, etc. Consider, if one wanted to stay the dryest and was in a stright down rain pour and wanted to go 300 feet to shelter. Should one walk or should one run for it, to stay the dryest? You see if you walk, you are being hit with the regular stright down drops for a longer time (like a slow acceleration). But, if one ran they would get the normal, stright down pour for a shorter length of time but, would also be running into rain that would have otherwise fell to the ground, had they not run into it. Seems like they are getting a double dose of rain but, for a shorter time. Would both ways get the same wetness? We will not consider if a wind was involved? I say they would get wetter to run. (Also, I think a fast acceleration will, over all, use more gas?). (plus the runner will run into rain down their whole front body & get very wet. A walker would mostly get the rain on ther head/shoulders (such would be wetter but the lower body would be dryer than if it ran into rain.) So we can mix MPG, Rain & physics/Einstien together and save money and gas.
__________________

GasSavers_jose is offline   Reply With Quote
Old 06-03-2007, 04:08 PM   #2
*shrug*
 
Join Date: Sep 2005
Posts: 6,195
Country: United States
Here is my take on it: http://crxmpg.com/accelmpg.html

Certainly doesn't apply to every car in every situation though.
__________________

SVOboy is offline   Reply With Quote
Old 06-03-2007, 04:18 PM   #3
Registered Member
 
omgwtfbyobbq's Avatar
 
Join Date: Jul 2006
Posts: 1,516
Country: United States
Yeah. ~3/4 pedal and make sure the car shifts early. When I leaned out my WOT fuel injection is saw what's imo a noticable increase in efficiency, since stock was ~12:1 compared to the ideal of 14.7:1. According to somthing SVOboy linked earlier, that means I could've stood to pick up as much as a 20-30% gain in efficiency during WOT.
__________________
Quote:
Originally Posted by FormulaTwo
I think if i could get that type of FE i would have no problem driving a dildo shaped car.
omgwtfbyobbq is offline   Reply With Quote
Old 06-03-2007, 06:54 PM   #4
Registered Member
 
Join Date: Apr 2007
Posts: 155
Country: United States
You're supposed to accelerate along the torque curve for your vechile. Where you would find a chart of the torque curve I have no idea though.
__________________

atomicradish is offline   Reply With Quote
Old 06-03-2007, 07:22 PM   #5
Registered Member
 
zpiloto's Avatar
 
Join Date: Mar 2006
Posts: 1,225
Country: United States
This will depend on if it's a standard or auto on how to accelerate. This has been covered before do a search and I'm sure you'll find it.
zpiloto is offline   Reply With Quote
Old 06-03-2007, 08:22 PM   #6
Tuggin at the surly bonds
 
Silveredwings's Avatar
 
Join Date: Apr 2006
Posts: 839
Country: United States
Well everyone has just about covered it

...except you could use an umbrella.
__________________
Reality is merely an illusion, albeit a very persistent one. - Albert Einstein
Silveredwings is offline   Reply With Quote
Old 06-03-2007, 09:28 PM   #7
Supporting Member
 
Hockey4mnhs's Avatar
 
Join Date: Dec 2006
Posts: 760
Country: United States
dont laugh at me please what it wot? its been a while since ive seen that used and i forgot what it was
__________________
Hockey4mnhs is offline   Reply With Quote
Old 06-03-2007, 09:30 PM   #8
Registered Member
 
kickflipjr's Avatar
 
Join Date: Sep 2005
Posts: 933
Country: United States
Wot= Wide Open Throttle
__________________
2008 EPA adjusted:


Distance traveled by bicycle in 2007= 1,830ish miles
Average commute speed=25mph (yes, that's in a car)
kickflipjr is offline   Reply With Quote
Old 06-03-2007, 09:32 PM   #9
Supporting Member
 
Hockey4mnhs's Avatar
 
Join Date: Dec 2006
Posts: 760
Country: United States
lol thats why i didnt know it becuse i never do it. thanks for pointing out the obvious
__________________
Hockey4mnhs is offline   Reply With Quote
Old 06-03-2007, 10:27 PM   #10
Registered Member
 
GasSavers_Ryland's Avatar
 
Join Date: Mar 2006
Posts: 1,325
Country: United States
Send a message via AIM to GasSavers_Ryland
WOT = wide open throttle.
on most fuel injected cars I've looked at, when the fuel presure regulator feels the drop in vaccum in the intake manifold, it bumps up the fuel presure so it can dump that extrea fuel in to produce more power, so if you use a light foot on the pedal it's going to keep the fuel mix leaner.
so really it seems like if you feel the need to accelerate faster then accelerat just below that point that you can hear the exaust/engine change in sound.
to go back to the idea of accelerating slowly, think of ridding a bicycle, does it use more of your energy to try to get up to full speed all at once, or slowly? I say being more aware, and shifting at what might feel like being slightly early might be the way to go.
__________________

GasSavers_Ryland is offline   Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuelly badge not updating for about 2 - 3 weeks Need Fuelly Web Support and Community News 18 07-01-2012 03:01 PM
Fuelly Android App - eehokie Fuelly Web Support and Community News 2 07-14-2010 09:59 PM
VW Jetta fast riser coolbreeze General Fuel Topics 5 07-22-2009 12:25 AM
DIY: Wire Tuck!!! SVOboy Experiments, Modifications and DIY 11 09-21-2006 05:17 AM
Condensator orevgym General Fuel Topics 0 07-23-2006 11:25 AM

» Fuelly Android Apps
Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 11:09 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.