Why are some fuel rails rectangular in shape?

[Haya94]

Question 1

Which type of port fuel-injection system uses a fuel temperature and/or fuel-pressure sensor?
◦ All port fuel-injected engines
◦ TBI units only
◦ Electronic returnless systems
◦ Demand delivery systems

Question 2

Why are some fuel rails rectangular in shape?
◦ Increases fuel pressure
◦ Helps keep air out of the injectors
◦ Reduces noise
◦ Increases the speed of the fuel through the fuel rail

[xoxo123]

Answer 1

Electronic returnless systems

Answer 2

Reduces noise

[Haya94]

Great answer, keep it coming

[xiazhe]

Thanks for the timely response, appreciate it