[Amc-list] Re; Interesting Water Injection for DIY

["dan whitehead" <freebird_58@xxxxxxxxxxx>]

Tom, if I read this wrong then I appoligize.  Turbochargers don't turn 
"waste" exhaust heat energy into intake air.  The velocity of the exhaust 
exiting the engine turns the turbine side of the turbocharger.  The impeller 
side (totally seperate from the turbine) compresses the intake charge 
"forcing" more air/fuel mixture into the combustion chamber.  The turbo heat 
is from the exhaust turning the turbine.  Remember, it's all atmospheric 
pressure that fills the combustion chamber and the pressure of the burnt 
gasses exiting the chamber.  A supercharger just "forces" more fuel charge 
into the chamber.

Dan Whitehead

>If I recall correctly it was big in WWII aircraft, but combustion science 
>and turbocharging mainly did it in; turbochargers turn "waste" exhaust heat 
>energy into intake air which is a huge help at high altitudes obviously.

>ALso water injection was big back in the days when ignition timing was not 
>very well controlled, usually retarded, and compressions were really low. I 
>would suspect that today, short of well-timed direct cylinder water 
>injection, that a lot of ignition timing work would do better than the 
>water -- on a modern (1960's+) motor.

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