Tuning Webers for mpg. (weber vs spica)

[Kevin Trent <trentkc@domain.elided>]

It has been asserted that properly tuned Webers do not suffer drivability 
problems.  I agree.  Anyone want to provide advice on tuning Wbers for fuel 
economy?  Tuning webers requires considering the interactions of the 
emulsion tune, main, and air corrector jets, and the transition from the 
idle circuit's jet. There are lots of available choices for all of these 
jets.  When I try to maximize fuel economy, usually by reducing the main 
jet, or messing with the idle jet, I tend to suffer in "smooth" 
drivability. Yet I keep hearing claims of Webers that give 25-30 mpg.

Below are the various Weber jet specs (descending order of preference) I've 
used in 1750 and 2000 Berlinas, each with a 11 mm intake, and a 10 mm 
exhaust cam, 32 mm venturi.  I get 20-22 mpg with these setups; driving a 
Spica car on the same commute gives me 25-27.

emulsion/main/air-correction/idle (2000): F16/130 or 135/220/50F8 (1600 GTA 
45DCOE)

emulsion/main/air-correction/idle (1750): F9/130       /200 50F8 (stock 1750)

emulsion/main/air-correction/idle (1750): F34/130 or 135/210/55F8 (late 
euro 2000)

Any suggestions for a different jet setup to improve fuel economy?

Thanks, //Kct, Powell TN  (~1100 feet altitude)
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