Great question Neil and one I have been interested in for a long time. I
agree with you about most of the software. Since SAE has some credibility
you might want to look at DynoSim. SAE lists it on their website for either
$149 or $199 depending on options. I just haven't had the time to evaluate
it. Go here
<http://www.sae.org/servlets/otherProduct?PROD_CD=PD220513&PROD_TYP=PDD&COMM
ON_SUCCESS=TRUE> for the SAE page.
Part of its description follows: . . . . The simulation calculates the gas
dynamic, thermodynamic, and frictional physics of virtually any 4-cycle
internal-combustion engine. Horsepower is determined from an analysis and
integration of cylinder pressures from 2000 to 11,000rpm. All basic engine
components and specifications are accurately modeled, including bore,
stroke, 1-to-12 cylinders, a wide range of cylinder heads and port
configurations, valve sizes, compression ratios, naturally-aspirated and
forced-induction systems, airflow, exhaust systems, and virtually any
camshaft timing or valve lift. American and Metric units are supported, and
conversion between unit systems is instantaneous.
-Elon
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