<VV> Jets for power

[Padgett]

> > The size of the carb is fixed, and as such, hopw much air will flow 
> through
> > it is fixed too ( A 390cfm carb flows 390 cubic inches of air per minute).

OY! First it is cubic feet per minute. Second that is probably at 1.5" drop 
across the venturi (4 bbl - 2 bbls are usually measured at 3").

Next if you hog out the venturi (going from 2" to 2.329" on a Rochester FI 
raised the flow from 620 cfm to well over 800), the flow *for a specific 
drop* will increase. However opening up the venturi will also decrease the 
signal (what makes the gas flow through the jets) so it will require larger 
jets to maintain the same mixture.

Is not trivial to calculate, most is just done by trial and error (and a 
few ruined carbs).

Padgett