hey motor heads

[buck futter]

has anyone noticed a correlation between the size of a combustion chamber and the size of the transfers? What do you make of it?

Buck

 

[Ronco_70]

bigger bore needs more air/fuel mix thus bigger carb ,ports & exhaust.

 

[buck futter]

well, I have seen some jugs for the same saw just a variation that may have the same displacement but different combustion chambers and transfer sizes?

 

[Ronco_70]

lots of varibles,cleaning out old exhaust , swirling effect , crush , compresion
pri & sec rpm volume air needed, timed area or taypud oh and cost of manufacturing.