use of MAP in FI calcs

[Greg Hermann]

At 6:51 PM 9/8/00, Bruce Plecan wrote:
>Quess I'm a little too old school.  I'd sure like a IAT post turbo, full
>time baro. and a good MAP system to try this all out on to be sure, but,
>While it might not make any more peak HP, I'd put a coule shiny pennies on
>have a more consistant performing car.
>Bruce
>
>
>
>You actually want _not_ to do a BARO correction in a lot of the
>calculations.  Once you've measured a certain absolute pressure in the
>plenum, you generally don't care what the pressure is on the other side
>of the throttle butterfly.  It doesn't matter if you have the
>supercharger from hell blowing into the throttle or not, a given MAP
>reading will always mean the same amount of air in the cylinders.
>(Actually, barometric pressure will affect cylinder scavenging - and
>there is a correction term for that.)

The big boy turbo motor tuners DO like to have an EGP sensor, upstream of
the turbine. It does help.

Greg
>
>
>
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