How the MAF really works
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Yes, unfortunately the written word loses tone...
My point was to have people think a little about the differences/similarities between the MAF and VE methods of obtaining airmass... after a few years of this thread being dormant maybe someone has new insights.
Greg has a good answer.
My point was to have people think a little about the differences/similarities between the MAF and VE methods of obtaining airmass... after a few years of this thread being dormant maybe someone has new insights.
Greg has a good answer.
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Yeah, I know, he wrote the book "Engine Management: Advanced Tuning"...
Specifically which debate...? There was no mention of any debate ending...?
Are you using a MAF or not, and why/not...?
Specifically which debate...? There was no mention of any debate ending...?
Are you using a MAF or not, and why/not...?
I was just talking about the name calling and stuff.
My car is primarily a street car with the occasional trip to the local track, NA, no gas or blowing on it, that may change my thinking. It depends a lot on the end usage of the car.
Yes, I do use a MAF. I tune my own stuff so the way I see is if the VE tables are set to be the primary "reference" for below 4000 rpms and the MAF picks up the job above that level if I tune the VE to within 1% all the way to WOT and do a MAF only tune after that I will not have any driveability issues. If the STFT and LTFT's are all as close to zero as possible I will be better off when I go WOT because the LTFT's won't be adding any other fuel over my commanded PE.
The VE table is just that, a predetermined reference table that corresponds to the demand of the engine. The MAF can help make that even better by fine tuning the fueling by measuring actual demand and adjusting according.
But then again, to each their own.
My car is primarily a street car with the occasional trip to the local track, NA, no gas or blowing on it, that may change my thinking. It depends a lot on the end usage of the car.
Yes, I do use a MAF. I tune my own stuff so the way I see is if the VE tables are set to be the primary "reference" for below 4000 rpms and the MAF picks up the job above that level if I tune the VE to within 1% all the way to WOT and do a MAF only tune after that I will not have any driveability issues. If the STFT and LTFT's are all as close to zero as possible I will be better off when I go WOT because the LTFT's won't be adding any other fuel over my commanded PE.
The VE table is just that, a predetermined reference table that corresponds to the demand of the engine. The MAF can help make that even better by fine tuning the fueling by measuring actual demand and adjusting according.
But then again, to each their own.
Last edited by 69LT1Bird; Apr 20, 2009 at 06:22 PM.
