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Default MAF sensor curve
Posted: Tue Jul 08, 2008 11:14 pm
by Fred
This is a fairly meaningless thing that will need to be setup per installation anyway, but I thought I'd post what I am going to do for others to see regardless. Because it doesn't really matter there probably isn't much point in discussing my exact chosen default, but the thread is here, so post your thoughts if you have any on the subject. No 20 questions though ;-)
MAF lookup value = (((ADC/16)+3.5)*0.39)^3.3919
Which produces a nice curve from close to zero through to close to 65535 max unsigned short value.
Fred.
Re: Default MAF sensor curve
Posted: Tue Jul 08, 2008 11:28 pm
by shameem
I was just looking into this over at MS land - so here's the link
http://www.microsquirt.info/mafmap.htm
Usual disclaimer - you may have to copy/paste link in new window/tab for it to work....
EDIT: it actually works - lets see how long though...
Re: Default MAF sensor curve
Posted: Wed Jul 09, 2008 6:45 am
by Fred
It may have worked because you already had the paged loaded (cached, so didn't pull a fresh copy, just displayed what you had already).
Certainly, it's broken now :-) Which isn't necessarily a bad thing, I don't need any of their info anyway.
Pretty hacky way of doing things IMO. Check out their AlphaN "algorithm" too. They translate TPS to fake MAP via a 6x6 table, bizarre.
Having said that, second rate stuff like MAF and TPS control don't deserve quite as much effort as MAP does so I might implement a few hacks of my own. Or, I might do it properly from the start. Not sure yet.
Fred.