Following from a safety first article
Limitations of fuel gravity feed. The altitude limitations linked to gravity feed are due to the application of Henry’s law. The law states that the concentration of a solute gas in a liquid is directly proportional to the partial pressure of that gas.Therefore, as the airplane climbs and as the atmospheric pressure decreases, so does the amount of air dissolved in the aircraft’s fuel. The excess air vents into the fuel tanks and engine fuel lines. At some point, the quantity of vapour present in the fuel, when it reaches the engine, may exceed the engine inlet maximum allowable vapour /liquid ratio and the operation of the engines is compromised.
This may give an idea that if an engine is handling higher volume of air may be it can handle more bubbling than the smaller one. But it is not authentic.