Adjusting Boost (Saab's APC system)

[wstrass at eastman.com]

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cc: DIY     --INTERNET DIY

*** Reply to note of 08/11/97 11:43
From: Wayne Strasser (CED Polymer Development)
_______________________________________________________________________
Subject: Re: Adjusting Boost (Saab's APC system)


I am not sure about your horsepower, but in most cases, you can APPROXIMATE
the HP changes with boost by the following:

New HP   New Boost + 14.7
------ = ----------------
Old HP   Old Boost + 14.7


If a vehicle was not previously turbocharged, you just change the
RHS denominator to 14.7*(mean volumetric efficiency/100).

These assume MANY things, but are good approximations over some ranges.

I am sure some SAE paper gives more accurate estimation parameters.

_______________________________________________________________________
        Wayne Strasser
        wstrass at eastman.com