How to get better gas mileage thread - Page 2 - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #26  
Old 09-02-2005
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Originally Posted by rwenzing
Install large diameter tires out back and small in the front - that way, you're always going downhill...

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  #27  
Old 09-02-2005
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Originally Posted by NHBubba
Here's some other great solutions! Definite must haves right here..

http://www.pickupspecialties.com/Tornado/Tornado.htm
http://www.nmoa.org/Products/fuelsaver.htm
Hah! Mere toys. Get serious! These scammers promise an average of 30% more MPG!
Quote:
You can do something about high gas prices by installing the The Fuel Vaporizer 2000™! It installs in parallel with your gas line whereby wasted liquid gas is recovered, vaporized, and injected directly into your intake manifold. You experience an immediate gas savings with increase mileage per gallon, more horsepower and better responsiveness with lower hydrocarbon emissions to boot! With a carbureted engine you'll simply feel like you have a constant tail wind and not deliver so much liquid gas with the accelerator, here is where your driving habits will an impact as well.
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"I installed the Fuel Vaporizer 2000™ on my 98 Chevy Van. I've had a whopping 80% increase in gas mileage, I used to get 9 miles per gallon, I'm averaging 16.2 miles per gallon now. It's like I have a tailwind all the time, it just doesn't take as much gas to go places now. I paid for this thing the first month I installed it! " Jim
This is classic snake oil. They tell you to replace your oxygen sensors when you install their kit. I'll bet that 50% of the claimed fuel economy improvement comes from the new sensors and the other 50% is the result of incorrect FE calculations and wishful thinking.

http://www.increase-gas-mileage.com/...s-mileage.html
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  #28  
Old 09-02-2005
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im highjacking!!!! does going 55mph really save gas? if you really think about it, when i go 65, the tach only goes up maybe 150rmps... yes it burns more gas then but i get there much faster thus, in theroy, useing less gas because im driving for less time....

sound reasonable or was i dropped on my head
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  #29  
Old 09-02-2005
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Originally Posted by 2x4XLT
im highjacking!!!! does going 55mph really save gas? if you really think about it, when i go 65, the tach only goes up maybe 150rmps... yes it burns more gas then but i get there much faster thus, in theroy, useing less gas because im driving for less time....

sound reasonable or was i dropped on my head
Friction from the tires and drivetrain is fairly constant at any legal speed but aerodynamic drag increases as the square of velocity.

Aerodynamic drag = kV˛

Below 35 MPH, road friction predominates; above 35, aero drag is more important and increases at a much faster rate than the velocity. If all else stays the same and you double your speed, the drag goes up 4 times. So, even though you would get there in half the time, you have to overcome 4 times the aero drag.

According to Ford, driving at a constant 55 MPH instead of 65 MPH would probably save you about 15%.



The RPM argument does not hold up because how much fuel you use is a matter of RPM and throttle position. The simple truth is that it takes more fuel per mile to travel as your road speed increases.

Last edited by V8 Level II; 09-02-2005 at 08:18 PM.
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  #30  
Old 09-02-2005
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lol kinda confusing and first but now i understand... thats good to know tho, im probably gunna cut down on my speed from now on... i never really paid attention to drag tho so that prob why it seem reasonable to me. thanks though
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  #31  
Old 09-03-2005
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how many mpg will a cold air intake get you
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  #32  
Old 09-03-2005
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Thanks Bob, that helps me too. I always wondered why I got insane gas mileage when going to our hunting land on roads that are 45. I know it switches over to O/D then and it's only about 1500 rpm but the drag stuff I learned will keep me from doing the 75. Now if the stupid politicians around here would read this to stop the highways from going to 75mph speed limit.... It's insane!
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  #33  
Old 09-03-2005
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Quote:
Originally Posted by 2003stealthedge
how many mpg will a cold air intake get you

Read my old post, it was a good amount.
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