Okay I get it I am just looking for a rough idea as I was getting 13mpg with the carb in its stock setting and knew I should be getting higher. I have apart from an offenhauser 4 barrel intake a stock engine In my 65 Chevelle which is essentially hte same as the Pontiac Lemans' which came with the OHC engines.
On a Different note. To achieve better fuel economy do I generally want a larger or smaller total fuel area in the primaries?
