calculating MPG and AFR
Thread Starter
Joined: Feb 2007
Posts: 9,486
Likes: 67
From: Melbourne, Australia
calculating MPG and AFR
Hey Ppl,
2 questions:
1) How can I work out my current fuel usage, is there some formula with RPM/IPW/time that will give me a rough fuel consumption? kinda like a trip computer?
2) Is it possible to work out AFR based on the fact we know how much air AND fuel we are injecting into the engine?
cheers
d.
2 questions:
1) How can I work out my current fuel usage, is there some formula with RPM/IPW/time that will give me a rough fuel consumption? kinda like a trip computer?
2) Is it possible to work out AFR based on the fact we know how much air AND fuel we are injecting into the engine?
cheers
d.
Evolving Member
Joined: Jun 2005
Posts: 282
Likes: 5
From: Kuala Lumpur
I love to know as well... evoscan fuel consumption did have something similar but I don't understand the data logged.
x*[InjPulseWidth]*20*6/[Speed]/1200
x*[InjPulseWidth]*20*6/[Speed]/1200
Last edited by sub7; Jun 9, 2008 at 12:45 AM.
That looks like it should theoretically work correct. Basically just use IDC and speed, the common unit is time.
Not sure on the units though, scaling is in cc's, in the US we'd shoot for gallons, and 1 US gallon = 3 785cc....
Not sure on the units though, scaling is in cc's, in the US we'd shoot for gallons, and 1 US gallon = 3 785cc....
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