after market airflow meters

[Tlsalt at aol.com]

Ron wrote:

As a first order aproximation with a constant A/F ratio and rpm is that
power is proportional to the amount of air that you are getting in the
engine.  With 30"Hg(0 psia) being no power and 0"Hg (14.7 psia) being
absolute max for a non-turbo engine a linear interpolation would be 3 1/3%
per inch.  Other factors such as tuned stacks would have some affect too
but this is the biggest factor.

With your example you are right, less than 5% (Unless you can also increase
rpm).

Hello Ron,

    Have you ever seen any published empirical data that verifies this 
concept ?  Unless there is substantial error in MAP sensor readings, it does 
not prove out in my experience. Where does the linear hp/inHg assumption come 
from ? The error may be in the assumption 30 Hg = 0.  What happens to your 
theory when VE exceeds 100% ? 

Paul Saltwick
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