Landracing Forum

Introductions => Formulas => Topic started by: panic on December 22, 2022, 01:56:42 PM

Title: Dynamic compression etc. from IVC, static CR
Post by: panic on December 22, 2022, 01:56:42 PM

I wrote an Excel spreadsheet that inputs # of cylinders, bore, stroke, rod length, IVC, static CR, atmospheric pressure, and ratio of variable heats between 1.2 and 1.4.
Returns effective displacement, effective stroke (inches and %), DCR, approximate torque at low speed, CCP psi (gauge and absolute).

PM me with your e-mail address for a free copy.

Title: Re: Dynamic compression etc. from IVC, static CR
Post by: tallguy on January 14, 2023, 01:43:22 PM

Please tell us more about "variable heats".  Thank you in advance.

Title: Re: Dynamic compression etc. from IVC, static CR
Post by: panic on January 14, 2023, 05:46:47 PM

A factor for the thermal efficiency of the engine (heat loss, % burned). Low value: crude, 1.4 perfect.