conversion question +

[Joeri de Haas]

Todd,

Have you considered boost dependent ignition retard as one of the possible
cause of EGT rise ? Also Turbocharged engines usually run lower compression
ratios leading to a less efficient expansion which also gives higher EGT 's.

Joeri de Haas


>     A couple of questions; a) what is the conversion for gal/hr to 
>     pounds/hr for gasoline? b) Also, with the turbo cars we see a dramatic 
>     rise in EGT during a 1/4 mile pass, with EGT typically rising to 
>     1550-1700F by the end. Can anyone comment on the big picture here, 
>     energy, phyics or otherwisewise, as to what is going on with turbo 
>     engines and EGT at wot? I realize that the exh manifold up to the 
>     turbine is at much higher pressure than for n.a., the turbine is 
>     extracting energy from the exh flow, etc. but is this EGT rise 
>     "necessary" for the turbo to keep up at wot/high compressor pressure 
>     ratios/high flows, ie is the high EGT sort of indicative of the 
>     potential energy "well" existing in the manifold, necessary for the 
>     turbo to draw from to "keep up" with it's chores on the comprssor 
>     side? Wow, I'm clear as mud here, right? :-)
>     
>     Todd       tking at scic.intel.com 
>