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


Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 01-06-2010, 06:26 PM   #1 (permalink)
EcoModding Lurker
 
Join Date: Nov 2008
Location: London UK
Posts: 95
Thanks: 3
Thanked 7 Times in 4 Posts
scangauge fuel tank size accuracy

Right. I have a scangauage 2 on my car which has a 9.6 gallon tank.

As the scangauge doesnt have high accuracy on fuel tank size measuremeant I have told it that its 10gallons as per the manual which says round up.

My Question is, does it affect the accuracy as , after a 10 or 20 fillups I have adjusted it to the point where my Miles to empty is now accurate.

Whereas before it used to say emtpy 30 miles before it was actually empty. it now correlates when its actually emtpy.

?
confused

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 01-06-2010, 06:52 PM   #2 (permalink)
epic stock master
 
luvit's Avatar
 
Join Date: Oct 2009
Location: US
Posts: 377

86 Accord LX (carb) - '86 Honda Accord LX
90 day: 35.57 mpg (US)
Thanks: 19
Thanked 17 Times in 15 Posts
i can't answer your question, but no matter what model of car i own, this makes me scratch my head:

when i'm on empty, i almost always pump 2 more gallons than the tank's rated size. -- i don't top off.

makes me mad or something.
__________________
.
single person car thread
.
  Reply With Quote
Old 01-06-2010, 06:54 PM   #3 (permalink)
EcoModding Lurker
 
Join Date: Nov 2008
Location: London UK
Posts: 95
Thanks: 3
Thanked 7 Times in 4 Posts
2 gallons! thats a lot!

When its really really emtpy I sometimes put in 2-3 liters more than the tank size which I attribute to the fuel pipe between the tank and the nozzle and between the engine and the tank.
  Reply With Quote
Old 01-06-2010, 07:19 PM   #4 (permalink)
epic stock master
 
luvit's Avatar
 
Join Date: Oct 2009
Location: US
Posts: 377

86 Accord LX (carb) - '86 Honda Accord LX
90 day: 35.57 mpg (US)
Thanks: 19
Thanked 17 Times in 15 Posts
.
i do this a lot.
.
__________________
.
single person car thread
.
  Reply With Quote
Old 01-06-2010, 07:20 PM   #5 (permalink)
EcoModding Lurker
 
Join Date: Nov 2008
Location: London UK
Posts: 95
Thanks: 3
Thanked 7 Times in 4 Posts
heh same.
  Reply With Quote
Old 01-06-2010, 07:26 PM   #6 (permalink)
Ecomodder en route
 
KITT222's Avatar
 
Join Date: Jan 2010
Location: South of the Cities, Minnesota
Posts: 190

Vib - '04 Pontiac Vibe base
Thanks: 10
Thanked 9 Times in 7 Posts
Automakers alter the gas gauge in your car so even when its on E the car has a gallon or so left. I was driving my dads fiances Corolla the other day, and it was on E. I mentioned it, and she said the car has a few gallons left. In fact when I got off the side roads, and onto the highway the needle went up.

In your case I'd say to round it down to 9 gallons. That means range wont be accurate, but it wont be an overshot. I dont own a Scangauge, so I dont know if theres a .5 gallons, or not, but if there is, than go with 9.5 gallons.
  Reply With Quote
Old 01-06-2010, 07:27 PM   #7 (permalink)
EcoModding Lurker
 
Join Date: Nov 2008
Location: London UK
Posts: 95
Thanks: 3
Thanked 7 Times in 4 Posts
So essentially the mile to empty and rage is more accurate now with the tank size on 10 gallons?
  Reply With Quote
Old 01-06-2010, 07:40 PM   #8 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 528 Times in 355 Posts
alexander.foti -

Since you are in the UK, I am assuming Imperial Gallons. Here's a trick that I haven't tried :

1 - 9.6 Imperial Gallons = 11.529 US Gallons = 43.642 liters (used this converter)

Code:
 9.6   => 10 /  9.6   = 1.0416 => +4.2% tank size error
43.642 => 44 / 43.642 = 1.008  => +0.8% tank size error
2 - Switch to liter units. Enter tank size of 44. Switch back to gallons. You may see 9 or 10 gallons, I don't know. Switch back to liter to verify that the liter value of 44 stayed in the scangauge. If it does, then you should have a more accurate tank size.

I haven't tried this, but it's an easy test.

CarloSW2
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
The Following 2 Users Say Thank You to cfg83 For This Useful Post:
mcrews (01-07-2010), MetroMPG (01-07-2010)
Old 01-06-2010, 08:24 PM   #9 (permalink)
ECO-Evolution
 
Lazarus's Avatar
 
Join Date: Nov 2007
Location: Central Texas
Posts: 1,482

Iron Horse (retired) - '97 Iron horse Intrepid

Ninja - '08 Kawasaki 250R
90 day: 76.23 mpg (US)
Thanks: 17
Thanked 44 Times in 33 Posts
Quote:
Originally Posted by alexander.foti View Post
Right. I have a scangauage 2 on my car which has a 9.6 gallon tank.

As the scangauge doesnt have high accuracy on fuel tank size measuremeant I have told it that its 10gallons as per the manual which says round up.

My Question is, does it affect the accuracy as , after a 10 or 20 fillups I have adjusted it to the point where my Miles to empty is now accurate.

Whereas before it used to say emtpy 30 miles before it was actually empty. it now correlates when its actually emtpy.

?
confused
Not sure I understand the question but when you fill up the amount you put in the tank should match the amount of fuel used on the SG. Mine was accurate to within .1 gallon almost every fillup once I got it adjusted.
__________________
"Judge a person by their questions rather than their answers."

  Reply With Quote
Old 01-06-2010, 09:16 PM   #10 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,191
Thanks: 179
Thanked 1,521 Times in 1,122 Posts
Quote:
Originally Posted by alexander.foti View Post
As the scangauge doesnt have high accuracy on fuel tank size measuremeant I have told it that its 10 gallons as per the manual which says round up.
...uh, which SGII instructions are you reading and following (Ver 4.5, 5.0 or 5.1)?

...early versions mentioned comparing "percent" value, while the newest (ver 5.1) "Quick Setup" mentions comparing "gallons" fuel used.

...I'm sure the "gallons" method described in the "Quick Setup" pamphlet is the most accurate method.

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to calculate MPG / fuel economy formula MetroMPG DIY / How-to 29 11-25-2013 07:47 PM
87 octane vs 89 octane kill-9 General Efficiency Discussion 51 02-14-2013 02:12 PM
Engine braking without using fuel idea Dane-ger EcoModding Central 38 02-04-2010 11:35 AM
Effect of fuel octane number on FE hummingbird EcoModding Central 32 10-28-2009 01:50 AM
Basic EcoDriving Techniques and Instrumentation SVOboy Instrumentation 2 11-17-2007 12:38 PM



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