Piston Travel vs Crank Rotation

Dodgy Kips motor? CDI? battery? diode? reg/rect? its all gobbledygook to me but some people understand it ask tham a question here
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Piston Travel vs Crank Rotation

Post by Luders » Tue Oct 14, 2014 8:54 am

For anyone using a programmable ignition who needs to calculate the above, I found this useful calculator


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

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Re: Piston Travel vs Crank Rotation

Post by JanBros » Tue Oct 14, 2014 7:12 pm

it is also included in my head calculator, both ways.

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