When flow is the main thing you're needing in a fuel system...anything that impedes it is of course a bad thing.

And it's harder for a liquid to flow than air.

It may look nice, and if the fitting internals are of large enough size then that will help. But from a flow perspective it is a bad design.


Seems silly everyone wanting lovely shiny colourful fittings, smooth bore elbows, nice hose etc...only to use lots of 90deg banjo type fittings where flow is most important.

it may not always make a huge difference, but every little helps.