Originally Posted by xzero117
on a car equipped with a double pumper carb settup
is it better to drive around at say 2000rpm in third gear at 30mph with the gas pedal pressed down 25% of the way
or to drive around at 1200 rpm in 4th gear at 30 mph with the gas pedal pressed down 50% of the way ?
in which scenario would I achieve the best mpg's
it's always recommended to stay in as high a gear as possible for fuel economy, but does that still apply if you're dogging it ?
More RPM on less throttle in this case. It does two things, it keeps the air velocity up in the primaries which meters better; it keeps the manifod vacuum up preventing the power valve from coming on.