i got this formula off the web and was wondering if it was correct and applied to sidedrafts, downdrafts, mech and vacuum secondaries.
Engine Size (CID) X Maximum RPM / 3456 = CFM @100% Volumetric Efficiency
i calculated for my engine a 13t that i only needed around 190 cfm at 100% efficiency
i was wondering how you match carbs with engines. given that a dcoe 40 phh carb can suck in 180cfm per cyl.d a 22r carb gets 326 cfm. how does one factor in if its a side draft or downdraft when choosing a carb? do you ultiply the 180cfm by 4 if you have twin dcoe's? i'm just plain confused, any help would be greatly appreciated
Sat, 02 April 2005 05:11
