B20 compression ratio math

 
Old 03-04-2018, 02:24 PM
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Default B20 compression ratio math

https://docs.google.com/spreadsheets...it?usp=sharing

Above is a link to view my google spreadsheet I made to calculate the compression ratio of a b20z with ycp pistons (type r copies in 84mm bore), a b16a head, 0.029" head gasket, stock crank and rods.
I compared this ratio to a compression ratio calculator and the numbers were fairly close, but not the same. I got 11.5 using my measured/researched measurements on the following calculator
http://www.zealautowerks.com/bseries.html
So their is only around a 0.1 compression ratio difference, possibly just different rounding (number of bits for a float) for each program?
I believe this to be accurate, however I would love to get some feedback on my calculations.

Last edited by EFort; 03-04-2018 at 02:48 PM.
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