Hi Lynn,
do you have any ideas on methods to lean a weber, or any carb for that
matter, for altitude mixture adjustment. I have heard of a vacuum line
to the inlet manifold thru a needle valve to the fuel bowl, then vary
the pressure head in the fuel bowl. And, jetting the carb at sea level
with the choke on, and then backing off the choke as the airplane
climbs.
Any comments or suggestions?
BR, Dave McC

The vacuum line to the bowl works fine on the dyno. I have no data on the choke idea. The big Webers have no chokes.

 

Lynn E. Hanover