EvilDaifu Cruise Whore Moderating Team 5,130 Member For: 19y 5m 4d Gender: Male Location: Melbourne Posted 31/03/17 01:45 AM Author Share Posted 31/03/17 01:45 AM Been a little while since I got back from Adelaide and average fuel economy is still showing as 10.9 l / 100 km. I reckon the way fuel consumption is calculated is the cause for my high readings earlier and my lower than expected readings right now. It would be good to know how its actually calculated if anyone in the know knows ... Link to comment Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 17y 1m 16d Gender: Male Location: Probably above atmospheric pressure Posted 31/03/17 09:15 AM Share Posted 31/03/17 09:15 AM I have wondered about the length of time it keeps readings for when calculating the average. If you never reset it does it have the ability to calculate everything from day dot? Or does it only keep results for say 100 hours? More likely it keeps a truncated average at X distance and changes it as you go I guess. 1 Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 29,127 Member For: 16y 9m Gender: Male Location: Melbourne Posted 31/03/17 09:19 AM Share Posted 31/03/17 09:19 AM (edited) edit: it would just average the latest two readings at each calculation time, I would imagine, to save potential calculation time problems. Now that I think about it, they'd probably go to a max stored array calculation (probably int8 or int16 sized, depending on architecture) and just use a stack style mechanism to push the oldest record out and replace the latest record in the array and just average across that. The FG polls the information much faster than the BA, though, so the numbers might be different so that it's not calculating too many numbers too often. Edited 31/03/17 09:24 AM by k31th Link to comment Share on other sites More sharing options...
Rab WOT? Moderating Team 10,981 Member For: 11y 10m 15d Gender: Male Location: Frankston, 3199 Posted 31/03/17 09:24 AM Share Posted 31/03/17 09:24 AM https://www.google.com.au/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=how+do+car+computers+calculate+mpg&* Pen, paper and odometer vs pump (or an app) over a long term will be the only one really worth worrying about or trusting. Especially if your cars modded 1 Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 29,127 Member For: 16y 9m Gender: Male Location: Melbourne Posted 31/03/17 09:27 AM Share Posted 31/03/17 09:27 AM should just merge this thread into the fuel consumption thread, eh? Link to comment Share on other sites More sharing options...
Box stock T. Member 1,384 Member For: 9y 9m 3d Posted 31/03/17 11:53 AM Share Posted 31/03/17 11:53 AM Do you know any good Moderators who could perform such a task... Link to comment Share on other sites More sharing options...
Rab WOT? Moderating Team 10,981 Member For: 11y 10m 15d Gender: Male Location: Frankston, 3199 Posted 31/03/17 12:05 PM Share Posted 31/03/17 12:05 PM good? Will let Evil make the call - it's his thread Link to comment Share on other sites More sharing options...
Puffwagon Trust me bro... Gold Donating Members 16,045 Member For: 9y 11m 11d Gender: Male Location: South Australia Posted 31/03/17 09:29 PM Share Posted 31/03/17 09:29 PM Something something Am I doing this right? Link to comment Share on other sites More sharing options...
Box stock T. Member 1,384 Member For: 9y 9m 3d Posted 31/03/17 11:57 PM Share Posted 31/03/17 11:57 PM No ya doofus it's anti clockwise. Hahaha Link to comment Share on other sites More sharing options...
4321 Bronze Donating Members 257 Member For: 10y 9m 14d Posted 01/04/17 08:08 AM Share Posted 01/04/17 08:08 AM It depends on what the tuner did. Usually with a high flow cat they dont work efficently & the second sensor will pick this up, log a code & turn the CEL on.Being a stock cat the sensor may have been left operating. I suppose the easiest way to check is crawl under the car & dissconect the plug then take it for adrive & see if the light comes on. Oxygen sensors are not really meant to last the life of the vehicl, at tech they said to veiw them as a long term spark plug Link to comment Share on other sites More sharing options...
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