Connecting Fuel Pressure gauge

[Vilhelm]

I have a 3-in-1 instrument. ( Electric oil temperatur and mechanical oil and fuel pressure.) Now there are two ports for fuel pressure. One pressure and one vent. I was just thinking to connect the vent port to a short tube 4 or 5 Inches long downwards. But then Tony Bingelis recommends in one of his books, that the vent tube should be a long one terminating in the carburetor inlet.
Is that important and does it make a noticable difference in the instrument reading ?? If it is not significant I would rather prefer the short tube.

 

[wassbiplane]

 

[darylat8750]

 

[Vilhelm]

 

[Neil]

 

[Dennis Flamini]

 

[Vilhelm]