QUOTE(vin man @ Oct 18 2018, 11:38 AM)
Dual Dellortos - yes.
Checked the intake runners with carb cleaner while running.
I had Webers 44s and these are Dellorto 40s. I'm not certain of jet size. Would need to pull carb off again and pull it apart to inspect jet size.
The 3 vacuum ports on each carb are plugged.
How would I know vent size?
The "40" refers to the barrel size on the carb. The venturis are removable from within the barrel of the carb and probably look something like this:
They will be stamped somewhere with a number. For a 2056 you probably want a vent sized at around 28. Too big and you are going to get results like what you are seeing, too small and the engine will run out of breath at higher RPM.
You can get at your jets without pulling the carb all apart. At least you can with Webers, and I think you can with Dels. Your idle jet SHOULD be the brass screw with the red o-rings. 2 per carb. Your mains are visible if you remove the aircleaner. Again, take this with a grain of salt, as I was a Weber guy. They are similar but not the same.
The jets also need to be sized to work in concert with the vents. Again, too much air and not enough fuel will make it hard to start. You could try increasing your idle jet size to fatten up the mix at idle and transition.
And there is also that carbs just need a bit more gas to get going. Have you tried pumping the pedal a few times before start to get some gas in there? Then playing with the throttle until the car starts? Carbs that start easily when cold with have a very high idle when warm - which is why lots of cars came with chokes. Our webers and dells don't have the chokes, we have to manage that ourselves until the engine gets warm.
Zach