VE tables

[Gary Derian]

I believe the OBD II systems compare the air flow both ways to self check.
Also,  MAF may max out before max power so speed density is used for the top
end.

Gary Derian <gderian at oh.verio.com>


> When this thread started I was going to reply exactly as
> stated below. This is certainly the theoretical answer. Last
> night I even spent 2 hours adding the 4 VE vs load vs RPM
> tables  to my LT1 editor.
>
> During my two hours of thought on implementing the tables I
> began to question the logic of this answer. VE is certainly
> the % Volumetric efficiency, and we would need to change it
> for items like Cam changes or porting that would effect the
> VE. The problem I have is that we also have a MAF on these
> engines. We therefore have two independent measures of Air
> Flow. Which one does What?? In a Speed Density or MAP based
> system VE would be the only answer, but in a MAF system how
> are these two independent figures used?
>
> Ken