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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 01-21-2011, 02:31 AM   #1 (permalink)
EcoModding Apprentice
 
Join Date: Oct 2010
Location: Ivins UT
Posts: 212

the green machine :P - '97 Jeep Grand Cherokee ZJ
90 day: 20.92 mpg (US)

Thee s10 - '00 Chevy S10
90 day: 24.27 mpg (US)

Freedom - '05 Kawasaki Ninja 250EX
90 day: 75.55 mpg (US)
Thanks: 2
Thanked 22 Times in 20 Posts
Talking vacuumizing fuel for better economy

has anyone else added a quart jar of gas to the vacuum lines of the car???? i did and got about 7 mpg increase on my 1997 jeep grand cherokee the only bad thing is that it only really gives my the gains in economy if i hold a sufficiant amount of vacuum. I have a 8 gallon compressor i modifide to fit under my jeep that i'm going to fell with 5 gallons of gas and i want to add a 35 inch pound vacuum pump to it and have a ball valve to control the amount of fuel the pump sucks out by connecting the ball valve to the throttle so i have gains throughout the throttle position.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 01-21-2011, 03:31 AM   #2 (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





__________________



Last edited by Frank Lee; 01-21-2011 at 03:38 AM..
  Reply With Quote
Old 01-21-2011, 09:30 AM   #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 6,693 Times in 3,469 Posts
Quote:
Originally Posted by stovie View Post
has anyone else added a quart jar of gas to the vacuum lines of the car???? i did and got about 7 mpg increase on my 1997 jeep grand cherokee
I think what Frank is trying to say is: sounds a lot like nonsense.
__________________
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 01-21-2011, 11:52 AM   #4 (permalink)
Master EcoModder
 
Ryland's Avatar
 
Join Date: Jan 2008
Location: Western Wisconsin
Posts: 3,903

honda cb125 - '74 Honda CB 125 S1
90 day: 79.71 mpg (US)

green wedge - '81 Commuter Vehicles Inc. Commuti-Car

Blue VX - '93 Honda Civic VX
Thanks: 867
Thanked 433 Times in 353 Posts
How does it compare to dumping the quart jar of gasoline in to your fuel tank?
Basically what you are doing is vaporizing the fuel, leaving behind the thicker varnish.
The good way to truly test this would be to put a valve on your vacuum line so that while you are driving you can disconnect it, otherwise you are just adding fuel vapor to your intake and at that point the question is, what are you going to do with a tank or jar of varnish? most modern cars already run with the fuel tank under a slight vacuum to prevent vapor emissions, you are just taking it to the extreme and causing the fuel to boil in your jar.
  Reply With Quote
Old 01-21-2011, 12:20 PM   #5 (permalink)
UFO
Master EcoModder
 
UFO's Avatar
 
Join Date: Sep 2010
Location: Denver, CO
Posts: 1,300

Colorado - '17 Chevrolet Colorado 4x4 LT
90 day: 23.07 mpg (US)
Thanks: 315
Thanked 178 Times in 138 Posts
I'd like to know how on earth 7mpg gain was calculated.....
  Reply With Quote
Old 01-21-2011, 03:34 PM   #6 (permalink)
EcoModding Apprentice
 
Join Date: Oct 2010
Location: Ivins UT
Posts: 212

the green machine :P - '97 Jeep Grand Cherokee ZJ
90 day: 20.92 mpg (US)

Thee s10 - '00 Chevy S10
90 day: 24.27 mpg (US)

Freedom - '05 Kawasaki Ninja 250EX
90 day: 75.55 mpg (US)
Thanks: 2
Thanked 22 Times in 20 Posts
Quote:
Originally Posted by UFO View Post
I'd like to know how on earth 7mpg gain was calculated.....
21mpg to 28mpg/24 gallon tank to 680 miles!!! i'm 3/8's the way through a tank and i have 320 miles

i know it sounds ridiculous but i'm getting that fuel economy and i'm not doing anything else but acetone it does drop the FE quit a bit driving on the highway though cause i have to stay at a TP that has to low a vacuum to work efficiently
  Reply With Quote
Old 01-21-2011, 03:57 PM   #7 (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 6,693 Times in 3,469 Posts
http://ecomodder.com/forum/showthrea...ery-11445.html
__________________
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 01-21-2011, 04:33 PM   #8 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,190
Thanks: 179
Thanked 1,522 Times in 1,123 Posts
...LOVE Stan Laurel & Oliver Hardy!


...HATE snake-oil MPG contraptions!
  Reply With Quote
Old 01-21-2011, 08:11 PM   #9 (permalink)
MPGuino Supporter
 
t vago's Avatar
 
Join Date: Oct 2010
Location: Cedar Rapids, IA
Posts: 1,766

The Karen-Mobile - '05 Dodge Magnum SXT
Team Dodge
90 day: 26.72 mpg (US)

Fiat Dakota - '00 Dodge Dakota SLT RWD Quad Cab
90 day: 16.67 mpg (US)

The Red Sled - '01 Dodge Durango SLT 4WD
90 day: 16.96 mpg (US)
Thanks: 799
Thanked 682 Times in 437 Posts
I dunno...

On the one hand, it might possibly (and I am going out on a limb here) be a rather novel form of heterogeneous charged combustion. That is, a pocket of stoich air/fuel mix is developed within a homogeneous mixture of much leaner air/fuel mixture, and the result is burned within the combustion chamber. The stoich pocket reliably ignites, and reliably burns the rest of the mixture inside the chamber. Modern cars with direct injection can do this easily.

On the other hand... Well, there is the question of the procedure used to test this claim. I am pretty skeptical right now.
__________________
The Fiat Dakota


The Karen-mobile


The Red Sled
  Reply With Quote
Old 01-22-2011, 02:30 AM   #10 (permalink)
Smeghead
 
Join Date: Oct 2009
Location: South Central AK
Posts: 933

escort - '99 ford escort sport
90 day: 42.38 mpg (US)

scoobaru - '02 Subaru Forester s
90 day: 28.65 mpg (US)
Thanks: 32
Thanked 146 Times in 97 Posts
Quote:
Originally Posted by stovie View Post
21mpg to 28mpg/24 gallon tank to 680 miles!!! i'm 3/8's the way through a tank and i have 320 miles

i know it sounds ridiculous but i'm getting that fuel economy and i'm not doing anything else but acetone it does drop the FE quit a bit driving on the highway though cause i have to stay at a TP that has to low a vacuum to work efficiently
Judging by the fuel gauge is a sure way to see whacked out data. Extrapolating from gauge position is an excellent way to exacerbate that whacked data.

Case in point

In my civic I have a 11.9 gallon tank. I can go 150 miles at 50mpg before it drops off of the full peg (that's 3 gallons used gauged by an MPGuino). If I use an extra gallon to go to 200 miles it drops to just above the 3/4 mark. If I look at the fuel gauge at that point it looks like I have used only a quarter tank on the gauge which is just shy of 3 gallons. 200 miles by 3 gallons is 66MPG that is about a 15 mpg error if I go by the gauge.

Moral of the story is get an average of a couple tanks with the mod and without as a bare minimum for getting an estimate of the effectiveness of your mod. It would be better if you could eliminate the variables of changing driving conditions but we know that it is not always possible when testing a mod for your self. Gauges are indicators, right now you have an indication of a great boost in mileage we are looking forward to some real data. Don't forget to include the fuel you are sucking in the vacuum lines in your total fuel for the tank.

__________________

Learn from the mistakes of others, that way when you mess up you can do so in new and interesting ways.

One mile of road will take you one mile, one mile of runway can take you around the world.
  Reply With Quote
Reply  Post New Thread


Thread Tools




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