has anyone got or used 40idf webers on a stock 1800 kombi?any ideas on jet sizes or is this a bit of overkill?thanks

I have 40mm drla dellortos on a stock 1800 motor. They came with the vehicle when purchased so I have no idea on jet sizes. They give better low down grunt and acceleration than stock solexes but are a bit more thirsty. Try this web site for webber tuning info
http://www.redlineweber.com/html/Tech/Table_of_contents.htm 

regards john

thanks john,looks like im up for a few fiddly hours with a handful of jets.