[W126 Coupe] optimum air to fuel ratio

[Dan Landiss]

David Fatovic wrote:

>Yeah, but there is less O2 to burn it.  Think of it in
>terms of altitude.  Why don't cars run as good up here
>as they do at sea level?  No oxygen to burn the fuel. 
>  
>
But David, we are not talking about depriving the engine of air. To 
reduce the air-fuel ratio without changing the altitude is simply to 
inject more fuel. It will not be burned as efficiently, but the HP gain 
from the extra fuel is greater than the loss from poorer efficiency. 
Kills gas mileage, of course<G>!

>You can put as much fuel in there as you want, if you
>don't have the proper amount of oxygen to burn it you
>are just wasting fuel.
>
Not quite. A very slightly rich mixture does produce more HP than the 
"ideal" ratio. Look for "lambda" charts on the Net, or I will will scan 
one from a Bosch fuel injection book later.

--
Never argue with a dragon, for you are crunchy and taste good with ketchup.