Use of MAP in FI calcs

[Bruce Plecan]

Bruce Plecan wrote:
> How about as it applies to EGR, and when your working with a couple
million
> cars, and the EPA sometimes close ain't good enough
Yes, BARO is used there.  BARO is also sometimes used in the coolant
temperature advance adjustments.  Some ECMs index by CTS and MAP, some
by CTS and (BARO-MAP), and some can do either.
>  I would think that a few kPa variation in baro would have minimal effect
on
> scavenging.
Here's the relevant table for a Fiero 2.8.  The table's value gets
multiplied into the "regular" VE value.  It is also used in the EGR
calculations.
ExhaustVETable  DC.B 96,32,9    ;<487> Exhaust volumetric efficiency
        ;         8  12  16  20  24  28  32  36  40 '00 RPM
        DC.B    141,141,141,138,134,130,128,128,128 ;75 KPa BAP
        DC.B    134,134,136,134,130,128,128,128,128 ;85
        DC.B    128,128,128,128,128,128,128,128,128 ;95
        DC.B    128,128,128,128,128,128,128,128,128 ;105

Makes absolute sense to me.
They're using it at what apprears to be the top end on the EPA test cycle,
where still in closed loop and before PE.  I'd be interested in using some
thing similiar table wise from 2K to 6K rpm,
then 90-95-100-105 and one for timing, both while in PE..
    Bruce

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