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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 02-10-2010, 02:52 AM   #21 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
You're going tank by tank and testing mods with each tank?

Why not try eliminating some variables and running each mod for more than one tank?

If you get a 5% increase from a mod, with your 22mpg, it's only going to equate to ~1mpg, Mike.

You'll likely dismiss it as "noise", but you'll have a better test bed if you had some sort of instrumentation that could quantify changes in the way your vehicle operates, even a vacuum gauge. IF you're getting better MPG, you should notice lower vacuum numbers while cruising.

Stickers is remarkably clean underneath, by the way.

__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 02-10-2010, 09:18 AM   #22 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,532

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 54.46 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car Mirage - '14 Mitsubishi Mirage ES (base)
90 day: 62.14 mpg (US)
Thanks: 4,082
Thanked 6,978 Times in 3,613 Posts
(Merged the 'testing' of the belly pan thread with the building thread.)
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
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 02-10-2010, 12:02 PM   #23 (permalink)
Master EcoModder
 
AeroModder's Avatar
 
Join Date: Jan 2010
Location: Oregon
Posts: 471

Tank - '96 Ford Aspire 4 door
Team Ford
90 day: 46.75 mpg (US)
Thanks: 15
Thanked 65 Times in 48 Posts
Thanks for merging them. It works better this way...


I've actually been thinking about getting some kind of guage, but I'm not sure what would work on a 1991.

Ideally, I should be testing each mod for 3 tanks with no other variables to give myself a better average to work with. However, seeing as how much I enjoy working on my car, It's hard for me to go two weeks without touching up things.

Though I probably will end up pulling panels off one at a time, run it for a few tanks without it, and see what kind of a difference each one makes. If I get better economy without one, then my design was flawed.
__________________
In Reason we Trust
  Reply With Quote
Old 02-10-2010, 12:16 PM   #24 (permalink)
EcoModding Lurker
 
stonebreaker's Avatar
 
Join Date: Feb 2010
Location: Fort Worth, Texas
Posts: 48
Thanks: 0
Thanked 9 Times in 6 Posts
As Christ mentioned, a vacuum gauge would work:
Sunpro CP7803 Actron Vacuum & Pressure Tester
  Reply With Quote
The Following User Says Thank You to stonebreaker For This Useful Post:
AeroModder (02-10-2010)
Old 02-10-2010, 12:59 PM   #25 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
Talk to dcb - a MPGuino should work on your car, I'm fairly certain you either have CPI or MPFI on there?
__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Old 02-10-2010, 01:22 PM   #26 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,532

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 54.46 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car Mirage - '14 Mitsubishi Mirage ES (base)
90 day: 62.14 mpg (US)
Thanks: 4,082
Thanked 6,978 Times in 3,613 Posts
I'm not a fan of tank-to-tank testing. Still too many variables (weather, being the biggest, but not only one).

See: http://ecomodder.com/forum/showthrea...ery-11445.html

I'd be more inclined to do A-B-A coastdown testing, where you're only looking for a relative difference in coastdown time/distance in relatively controlled circumstances, rather than trying to measure MPG change in the real world.
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
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
The Following 2 Users Say Thank You to MetroMPG For This Useful Post:
AeroModder (02-10-2010), Christ (02-10-2010)
Old 02-10-2010, 03:41 PM   #27 (permalink)
Master EcoModder
 
AeroModder's Avatar
 
Join Date: Jan 2010
Location: Oregon
Posts: 471

Tank - '96 Ford Aspire 4 door
Team Ford
90 day: 46.75 mpg (US)
Thanks: 15
Thanked 65 Times in 48 Posts
Christ: I believe the 2nd Gen Tempos have MPFI. I'll look into the MPGuino too, since I've been interested in mapping MPG vs. speed for a while. Without the proper instruments, I've mostly been running blind.


Stone: Thanks for the link. That's not very pricy at all, so I just might get that when I get some money.

Metro: I've actually been doing some coastdown tests using speed limit signs as a guide. It definitely seems to be slowing more gradually from 45 to 35 than before, but the mileage still isn't as high as I'd like. I'm going to try pulling out the K&N filter and put the Fram back in and see what that does for a couple tanks. Maybe I can do some simple, reversable changes to the engine and see what that gets me.
__________________
In Reason we Trust
  Reply With Quote
Old 02-10-2010, 10:54 PM   #28 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
Quote:
Originally Posted by AeroModder View Post
Christ: I believe the 2nd Gen Tempos have MPFI. I'll look into the MPGuino too, since I've been interested in mapping MPG vs. speed for a while. Without the proper instruments, I've mostly been running blind.


Stone: Thanks for the link. That's not very pricy at all, so I just might get that when I get some money.

Metro: I've actually been doing some coastdown tests using speed limit signs as a guide. It definitely seems to be slowing more gradually from 45 to 35 than before, but the mileage still isn't as high as I'd like. I'm going to try pulling out the K&N filter and put the Fram back in and see what that does for a couple tanks. Maybe I can do some simple, reversable changes to the engine and see what that gets me.
Mike (That is your name, isn't it?)

I think you'd be able to tell quickly if you have MPFI by popping your hood. If you've got an intake manifold that's about the length of the engine, and curves up over the valve cover kinda, it's MPFI.
__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Old 02-10-2010, 11:10 PM   #29 (permalink)
Master EcoModder
 
AeroModder's Avatar
 
Join Date: Jan 2010
Location: Oregon
Posts: 471

Tank - '96 Ford Aspire 4 door
Team Ford
90 day: 46.75 mpg (US)
Thanks: 15
Thanked 65 Times in 48 Posts
Yes, it's MPFI. I wasn't sure what the difference between the different fuel injection types were.
__________________
In Reason we Trust
  Reply With Quote
Old 02-10-2010, 11:13 PM   #30 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
Quote:
Originally Posted by AeroModder View Post
Yes, it's MPFI. I wasn't sure what the difference between the different fuel injection types were.
CFI - single injection point, basically an electronic carb.

MPFI - individual runners/injectors for each cylinder and a main plenum, to which there is a throttle body attached.

If you have MPFI, you should be able to use the MPGuino.

After reading this message, click the word MPGuino and it will take you to the thread that explains what it is and where/how to get one. dcb makes them pre-assembled, so you can get one and just hook up 4 quick wires and spend some time calibrating it, and you're golden.

EDIT - Seems like it's not autolinking?

__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
The Following User Says Thank You to Christ For This Useful Post:
AeroModder (02-10-2010)
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
efficient engine design user removed EcoModding Central 27 11-24-2014 02:02 AM
PCB design for led bargraph battery monitor mora DIY / How-to 30 10-20-2011 12:02 PM
Win $100.00 in Free Gas! Design Contest: Ecomod my Ride XFi EcoModding Central 127 02-17-2011 01:07 AM
Efficient Engine Design ??? pgfpro EcoModding Central 110 02-12-2010 02:53 PM
Civic grill block, front undertray, tire deflectors daqcivic Aerodynamics 24 05-13-2009 04:52 AM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com