expansion of fuel/air mixture

[Camden Lindsay]

>Yep, there is a reasonably accurate way, but it's not a short way !
>
>You need to calculate your way around the cycle, and figure out what you
>have left at BDC . To ballpark it, with an NA engine, at sea level, and at
>WOT, the number will likely be somewhere between 50 and 90 psia (ABSOLUTE)
>at (or near) BDC when the exhaust valve opens.

hmm... would a integral of some function apply to this?
I am working on a boosted car, although the N/A function should be 
considered for initial spool-up.

thanks Greg!
Camden

>
>Greg
>
> >
> >
> >
> >
> >
> >>Better define what you are talking about better.
> >
> >
> >>
> >>For instance, at ignition, there is (ideally) no expansion beccause the
> >>combustion chamber doesn't allow it--so there is a rise in temperature 
>and
> >>a consequent rise in pressure. The rise in temp is determined by the 
>heat
> >>of combustion available and the mass and specific heat of the gas 
>present.
> >>The rise in pressure is then determined by the gas law.
> >>
> >>Greg
> >>
> >
> >
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