Fuel Saving Speed

[Xefera]

I thought this would be appropriate since there are so many threads on how best to make your ride as fuel efficient as possible.

 

http://www.welltall.com/ymc/discovery/car/fuel_save.html

 

For those who wish to skip all the calculations, just scroll all the way down to read the conclusion. It certainly shifted my paradigm on the whole fuel efficiency theory

 

Happy reading!!

[Landex]

the report only shows the ideal speed for skyline..

 

hw abt for jepun n tomyum sedans on our roads?

 

wld it slower than 25kmh?

 

[Normal_aspirated]

yup, agree with u. driving below 90kmph on 5th or 6th gear in SG expressways, is most fuel efficient.

[Eyke]

stick to the 65-80km/h range for best results.

 

http://library.thinkquest.org/4116/Trip_Planning/speed.htm

 

for the scientific explanation:

 

http://auto.howstuffworks.com/question477.htm

[Robin]

i thought the author was trying to be funny

 

i've a vacuum gauge in my car and from the reading, i believe that 60-79km/h is the best speed to obtain good FC

[Landex]

hmmmmm...

 

so it means dat the leport is bogus??

 

btw... ur abatar is

[Xefera]

If you read the report, the author's calculations are based on the engine alone and not taking into considerations factors like drag coefficient, rolling resistance, etc.

 

Its an interesting point to note though, as it does make sense that the government is trying to help you save fuel by limiting the speed to 90km/h

Edited February 28, 2007 by Xefera

[Enrique]

my car is most efficient when maintaining at 90km/h.

[Landex]

orkeees...

 

moi is not the scientikfic person....

 

so much so for speed limitations...

 

btw.. the ninja on the overhead bridge along bukit timah road is now hiding on the extreme left in the mornings..

 

watch out!!!!!!!!!!!

 

[W33tc]

My guess is that most cars with a 4 or 5 speed gearbox, will be most fuel efficient up to about 90kph. Cars with a 6 speed or more gearbox will have a slightly higher optimum speed for fuel efficiency.... my .0002cents

[Jchuacl]

Rather just purely on speed, I did an experiment before trying to co-relate

the % where the fuel injectors are opened (through throttle control) versus fuel consumption. (I used Bliz R-vit to read OBD info)

 

I did observe that when the fuel injectors are opened with a smaller %, I did observe better fuel consumption.

 

Next, I try to find at which speed where I keep the fuel injectors open at the lowest

% while maintaining the speed.

 

For my car, I've observed it's +- 80km/h.

 

This is as much as I can go to prove through experimental observation rather than just purely stating a number.

 

I thought this would be appropriate since there are so many threads on how best to make your ride as fuel efficient as possible.

 

http://www.welltall.com/ymc/discovery/car/fuel_save.html

 

For those who wish to skip all the calculations, just scroll all the way down to read the conclusion. It certainly shifted my paradigm on the whole fuel efficiency theory

 

Happy reading!!

Edited March 1, 2007 by Jchuacl