[Mikemuir]

Hi guys
Thanks for your help
I guess I am interpreting too much into this and cam should be ok
Any other reasons the vacuum is low?
If I slowly move throttle and keep vacuum above 5 the car runs perfectly with no bog or hesitation/backfire and loves the revs 😃
Over or above 1/4 throttle Definitely bog and hesitation when secondaries open / high velocity through carbs so yes believe I need some more enrichment
There is definitely no vacuum leaks around manifold on top,I have rechecked with carb clean
I did put the black springs in (heaviest) but still the same as above.
Installed new gaskets on intake manifold with gasket seal as well so should imagine they should be good.
Excuse my lack of knowledge with these carbs but everyday we learn something new

Help appreciated
Cheers