I've got a pair of 40IDF webers I want to try on 1mm oversize 1800 type 4 with a mild cam.

Currently has 28mm venturi's in it
Any rough ideas on jetting for this engine? After lowdown torque as its in a Baja bug

This helped me alot.

http://www.aircooled.net/vw-carburetors-jetting-102/ 

1.25 x body size for idles (40 x 1.25 = 50)
4.2 x vent size for mains (28 x 4.2 = 120

I would lean toward 55 idles
120-125 on the mains should be close

Thanks guys