Compression Calculator as accurate as Indycars

Thanks for posting a quite useful link to a calculator , every tool, used to more accurately calculate the correctly matched combination of components helps reduce problems!

accurate, static compression ratio calculations require accurate volume measurements,
of the combustion chamber ,piston dome or valve relief notches, head gasket thickness cylinder diameter, deck height stroke etc.
not an assumption, and then you'll need to calculate the dynamic compression, which is based on , and really effected by, the valve seats angles, valve shape,
valve diameter and ports shape and size, the cams valve timing, air density and port air velocity /speeds and inertial energy, and exhaust scavenging efficiency, and operational rpm,

http://garage.grumpysperformance.co...r-piston-dome-or-port-volume.2077/#post-35319

http://garage.grumpysperformance.com/index.php?threads/dynamic-vs-static-compression.727/

http://garage.grumpysperformance.co...lsa-effects-your-compression-torque-dcr.1070/

http://garage.grumpysperformance.com/index.php?threads/port-speeds-and-area.333/

http://garage.grumpysperformance.com/index.php?threads/more-port-flow-related-info.322/

http://garage.grumpysperformance.co...nter-angle-vs-lsa-lobe-seperation-angle.3816/
 
What I like is it will figured the both ratios and it gives you options to either use your Intake Closing or you can put in the ADV duration and LSA and it figures it both ways. I put in all the stuff for my engine and did it both ways with duration and lsa, then with intake closing and it was identical. So I know its right, it measures it exactly the same as Indycars calculator both ways.
 
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