This is my site...
Yes, when heads are heating, they have thermal expansion, not at
the same speed for the links between each barrel.
So, idle tuning will not be always the same. Good in cold conditions
or good in hot conditions, but never good for both conditions...
Alfa tried to solve using aluminium links between each lever. Not enough!
The solution is to let a little gap between each
lever and the main aluminium rod (1 rod for 3 levers).
So no problem now with all my V6 with carbs...
I'm in the way to alterate a 24V engine to IDF 48 carbs.
Adding too ignition regulator on the front of engine, like Ferrari Dino V6.
I will do same job on a 3 liter Milano V6, with IDF 44 carbs.
Coming soon !!!