Been playing with my twin 45 Webers...
I started having an issue with Eugene 'spluttering' on fast/sharp right handers/corners, but as it was a progressive issue I didn't really think much of it to start with - just assumed it was normal with 'carbs'.
Anyway, decided to give the carbs a check over, and spend a lot of time chatting with Webcon.
They suggested 2 possible issues - incorrect float height, and the possibility that the 'cold start' circuit was dumping petrol into the manifold due to high G forces in right hand corners (right hand as I have a Zetec with the carbs on the driver's side/right hand side.)
So, ordered 2x DCOE cold start device elimination kit as the first step, and fitted: http://www.webcon.co.uk/shopexd.asp?id=15057
While fitting this kit I also looked into the float height, and became concerned that the method used to set the height is a lot less than ideal, so started looking into ways to actually measure the fuel height in the float chamber, as that is really what you are setting...
And after a bit of Googling found this:
But, working out the actual height of the fuel inlet holes 25mm would have the fuel running down the jets just about all the time...
So, a bit more Googling found comments on the ideal fuel height being 29mm from the top of the float chamber, not 25mm: http://www.classiczcars.com/topic/44512-setting-weber-dcoe-fuel-level-with-caliper/
And then found this pdf document, also stating 29mm: https://centerlinealfa.com/sites/centerlinealfa.com/assets/files/default/dcoe_setup.p df
So, I tested both, and 25mm cause a lot of spluttering and hesitation, while 29mm cured everything!
Obviously, removing the cold start devices may have helped, but the result is a very happy Eugene, running better than I can remember.
(Also check out the Air/Fuel Ratio thread: http://www.7-dna.com/forums/index.php?action=vthread&forum=2&topic=1109
and the Spark Plug thread: http://www.7-dna.com/forums/index.php?action=vthread&forum=2&topic=440)