Tunnel Ram Tune

Ahhhh RB,
Your ignorance just grows & grows.....
I never said a bigger MAB would lean the curve at all speeds...or anything remotely like that.
The fuel curve in the mid range gets trimmed by the emulsion holes: their size, position & in some carbs like Webers, the number of holes. The MAB supplies the air & it does double duty by controlling when the system starts. Agree that smaller MAB richens the mixture at the higher rpms.

We are all still waiting to here about two straws, post #25.....