Downpipes and physics

[noggythenog]

So........im confused :lol




Maybe i'm on the wrong thread.




Phil..on basis of your experiment...if it applies to exhausts then would decrease friction & therefore increase flow....or in exhaust terms be more free flowing exhaust.




But flow surely differs to pressure & i am led to believe that the pressure in an exhaust system is equally important, back pressure etc etc......






So would oval pipes also be bad for pressure or is that purely a case of if there is the same internal area then the pressure will be the same regardless of the shape?????








Just found something else out too......circular pipes can withstand large pressure differences between the inside and outside without experiencing any significant distortion......so your funny shaped pipes could get squished under heavy load.