True Ltr/100Klm Calculation? - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Inline 6 Tech
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 03-10-2005, 02:44   #1 (permalink)
AU3 BT1
 
scruba's Avatar
 
Join Date: Jul 2003
Location: North Brisbane
Age: 39
Posts: 199
Question True Ltr/100Klm Calculation?

How is the true Ltr/100Klm calculation worked out on cars not fitted with a trip computer?

I guess it can only be carried out on a full tank of fuel and then at the refill what has been used in ltrs is divided by the klms driven. Is this correct?
__________________
Our new ride - Narooma Blue Forte BT1 06/2002 AU3
My Falcon is here
AU1 Fairmont Galaxy Blue (Company Car)
Brisbane Car Detailers We share your passion for cars
scruba is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 03-10-2005, 04:18   #2 (permalink)
Who wants more than 80kw?
 
Join Date: Jan 2005
Posts: 95
Re: True Ltr/100Klm Calculation?

I wouldnt trust the trip computer that much.

It works out your L/100km based on how many injector pulses are fired over the course of km travelled. The flow given by an injector pulse just follows an equation that says X amount of fuel goes through with injector pulse length Y based on the injector characteristics.

When the injectors get blocked / old, the injector characteristics will change. Over the course of many km, this can give you a false economy reading.

Ive always worked it out starting with a full tank of fuel, running it to the same point (just under 1/4) then filling up:

Economy(L/100km)=Fuel(L)/(KM travelled / 100)
81foXDwagon is offline   Reply With Quote
Old 03-10-2005, 15:49   #3 (permalink)
Registered User
 
Join Date: Dec 2004
Age: 65
Posts: 120
Re: True Ltr/100Klm Calculation?

All good points about the injectors. On my EL XR6 5-sp I compared the trip comp against a manual calculation for fuel usage on the same tank of fuel. That is, I ran the tests simultaneously. Full tank, zeroed the TC and trip meter and away I went on a country trip. After I'd carefully refilled and punched a few buttons on the calculator, I found that there was only 0.2 L/100k difference between the two. I thought that was pretty good, and good enough to believe the TC for all practical purposes.
fordboy98 is offline   Reply With Quote
Old 03-10-2005, 18:38   #4 (permalink)
AU3 BT1
 
scruba's Avatar
 
Join Date: Jul 2003
Location: North Brisbane
Age: 39
Posts: 199
Re: True Ltr/100Klm Calculation?

Cheers.

I've been getting odd numbers lately.

7ltr/100, 12ltr/100, 10.2ltr/100 etc.

Weird. Maybe the odometer is out?
__________________
Our new ride - Narooma Blue Forte BT1 06/2002 AU3
My Falcon is here
AU1 Fairmont Galaxy Blue (Company Car)
Brisbane Car Detailers We share your passion for cars
scruba is offline   Reply With Quote
Old 03-10-2005, 22:42   #5 (permalink)
grippin'n'rippin
 
sleepwalker's Avatar
 
Join Date: Oct 2002
Location: Adelaide SA
Posts: 250
Re: True Ltr/100Klm Calculation?

fill it up to the top, drive around for 100k's and then pull into servo and see how much you need to fill up again.
sleepwalker is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Inline 6 Tech



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
EA true dual exhaust T_Terror Exhaust 22 11-05-2004 14:03
You Know Its True BlueAU The Pub 6 06-14-2004 20:00
Opinion: AU was never a true EL replacement Troutman The Pub 30 11-13-2003 18:28
McDonalds story! is it true? ED Manual The Pub 24 03-27-2002 04:43
True Street Autocross Series Dan [Sac] Ford Probe Forum | Mazda MX6 Forum 0 11-29-2001 12:36

Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 13:20.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.