Reply to "Holly ultra issues"

I run the floats low and adjusted the idle screws lean using a vacuum gauge - they are 3/4 to 1 turn out.

I've also added a Holley heat shield with a 1/4 inch plastic spacer AND insulated the fuellines.

I also tried to run the fuel bowls almost empty before shutting the motor down (I have a switch for the Electric pump) thinking that the fuel pressure is too high leading to fuel being pressed through the needle and seats(pressure gauge reads 3-4 psi with the engine running, but maybe reading incorrect as the pump is internally regulated for 6.5 psi).
I will add a regulator.

None of these mods has solved the hotstart problem.

The carb is brand new but it's possible that the acc. pumps need to be checked? As Hustler mention, it may also be a single plane thing I have to live with.

I'm adding a pantera Electronics engine controller which run the fuel pump at 50% reduced speed which should reduce pressure as well. It also generates more spark compared to my current MSD set-up so maybe that will help.