TTi shorty headers v ministarter

Sorry- I’m late to this question:
1) heat adds resistance to electrical.
2) what size battery cables are you running? Too small of a cable can affect crank speed.
3) timming also effects load on the starter. Too much and the starter is fighting to start.
4) float setting off? Sound weird right? But if the float is off when hot it can allow fuel to drip out. Evaporates by the time car cools off. Smell oil on dipstick for smell of gas.
5) Bad starter windings. New does not matter. So much chay-na parts in side now that are garbage (they tend to use cheaper thinner wire for the windings to save money)