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Piston Travel vs Crank Rotation

Posted: Tue Oct 14, 2014 8:54 am
by Luders
For anyone using a programmable ignition who needs to calculate the above, I found this useful calculator

http://www.dansmc.com/mc_software2.htm

a = ignition advance in degrees
T = ignition advance in mm
R = engine stroke divided by 2
L = conrod length in mm

T = L + R·(1-cos a)-√L² -(R·sin a

Sorry, the equation was the best I could get it to look using the character map

Re: Piston Travel vs Crank Rotation

Posted: Tue Oct 14, 2014 7:12 pm
by JanBros
it is also included in my head calculator, both ways.

http://users.telenet.be/jannemie/Head%20Calculator.xlsx