Model Forum / Radio Controlled / Water Models / July 2008

i know that they rate carbs by the ventury size butt what does that
mean
what i really whont to know is how do i figure out the proper size carb
for a 25cc homi by the numbers. like the way you can figure what size
carb  you need for a v-6 from the rpm,s and displacment of the motor.
does the size of the ventury hint at how much air the carb will flow i
know the bigger the ventury the more flow butt i am looking to know the
numbers. thanks